ABCs of z/OS System Programming Volume 3 - IBM Redbooks

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3.10 Data sets eligible for EAV volumes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 3.11 EAV volumes and multicylinder units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 3.12 Dynamic volume expansion (DVE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 3.13 Using dynamic volume expansion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 3.14 Command-line interface (DSCLI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 3.15 Using Web browser GUI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78 3.16 Select volume to increase capacity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 3.17 Increase capacity of volumes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 3.18 Select capacity increase for volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81 3.19 Final capacity increase for volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 3.20 VTOC index with EAV volumes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 3.21 Device Support FACILITY (ICKDSF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 3.22 Update VTOC after volume expansion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 3.23 Automatic VTOC index rebuild - z/OS V1R11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89 3.24 Automatic VTOC rebuild with DEVMAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 3.25 EAV and IGDSMSxx parmlib member . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 3.26 IGDSMSxx member BreakPointValue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 3.27 New EATTR attribute in z/OS V1R11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 3.28 EATTR parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99 3.29 EATTR JCL DD statement example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 3.30 Migration assistance tracker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102 3.31 Migration tracker commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104 Chapter 4. Storage management software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107 4.1 Overview of DFSMSdfp utilities. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108 4.2 IEBCOMPR utility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110 4.3 IEBCOPY utility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112 4.4 IEBCOPY: Copy operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114 4.5 IEBCOPY: Compress operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116 4.6 IEBGENER utility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117 4.7 IEBGENER: Adding members to a PDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119 4.8 IEBGENER: Copying data to tape . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120 4.9 IEHLIST utility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121 4.10 IEHLIST LISTVTOC output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122 4.11 IEHINITT utility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123 4.12 IEFBR14 utility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125 4.13 DFSMSdfp access methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126 4.14 Access method services (IDCAMS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129 4.15 IDCAMS functional commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131 4.16 AMS modal commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133 4.17 DFSMS Data Collection Facility (DCOLLECT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135 4.18 Generation data group (GDG). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137 4.19 Defining a generation data group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139 4.20 Absolute generation and version numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141 4.21 Relative generation numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142 4.22 Partitioned organized (PO) data sets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143 4.23 PDS data set organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144 4.24 Partitioned data set extended (PDSE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146 4.25 PDSE enhancements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148 4.26 PDSE: Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150 4.27 Program objects in a PDSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152 4.28 Sequential access methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154 4.29 z/OS V1R9 QSAM - BSAM enhancements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156 iv ABCs of z/OS System Programming Volume 3
4.30 Virtual storage access method (VSAM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158 4.31 VSAM terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160 4.32 VSAM: Control interval (CI). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162 4.33 VSAM data set components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164 4.34 VSAM key sequenced cluster (KSDS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166 4.35 VSAM: Processing a KSDS cluster. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167 4.36 VSAM entry sequenced data set (ESDS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169 4.37 VSAM: Typical ESDS processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170 4.38 VSAM relative record data set (RRDS). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171 4.39 VSAM: Typical RRDS processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172 4.40 VSAM linear data set (LDS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173 4.41 VSAM: Data-in-virtual (DIV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174 4.42 VSAM: Mapping a linear data set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175 4.43 VSAM resource pool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176 4.44 VSAM: Buffering modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177 4.45 VSAM: System-managed buffering (SMB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179 4.46 VSAM buffering enhancements with z/OS V1R9 . . . . . . . . . . . . . . . . . . . . . . . . . . . 181 4.47 VSAM SMB enhancement with z/OS V1R11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184 4.48 VSAM enhancements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186 4.49 Data set separation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187 4.50 Data set separation syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188 4.51 Data facility sort (DFSORT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190 4.52 z/OS Network File System (z/OS NFS). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192 4.53 DFSMS optimizer (DFSMSopt) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194 4.54 Data Set Services (DFSMSdss) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196 4.55 DFSMSdss: Physical and logical processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198 4.56 DFSMSdss: Logical processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199 4.57 DFSMSdss: Physical processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201 4.58 DFSMSdss stand-alone services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203 4.59 Hierarchical Storage Manager (DFSMShsm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204 4.60 DFSMShsm: Availability management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205 4.61 DFSMShsm: Space management. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207 4.62 DFSMShsm: Storage device hierarchy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209 4.63 ML1 enhancements with z/OS V1R11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211 4.64 DFSMShsm z/OS V1R11 enhancements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213 4.65 ML1 and ML2 volumes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215 4.66 Data set allocation format and volume pool determination . . . . . . . . . . . . . . . . . . . . 217 4.67 DFSMShsm volume types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219 4.68 DFSMShsm: Automatic space management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221 4.69 DFSMShsm data set attributes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223 4.70 RETAINDAYS keyword. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225 4.71 RETAINDAYS keyword. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227 4.72 DFSMShsm: Recall processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229 4.73 Removable media manager (DFSMSrmm). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231 4.74 Libraries and locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233 4.75 What DFSMSrmm can manage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234 4.76 Managing libraries and storage locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237 Chapter 5. System-managed storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239 5.1 Storage management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240 5.2 DFSMS and DFSMS environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241 5.3 Goals and benefits of system-managed storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242 5.4 Service level objectives. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245 Contents v
Page 1: ibm.com/redbooks Front cover ABCs o
Page 4 and 5: Note: Before using this information
Page 8 and 9: 5.5 Implementing SMS policies. . .
Page 10 and 11: 7.29 Accessing a data set with DFSM
Page 12 and 13: Trademarks IBM, the IBM logo, and i
Page 14 and 15: Paul Rogers is a Consulting IT Spec
Page 16 and 17: xiv ABCs of z/OS System Programming
Page 18 and 19: 1.1 Introduction to DFSMS IBM 3494
Page 20 and 21: Network File System The Network Fil
Page 22 and 23: Using access methods, commands, and
Page 24 and 25: Distributed data management DFSMSds
Page 26 and 27: Shelf management DFSMSrmm groups in
Page 28 and 29: Availability management DFSMShsm ba
Page 30 and 31: key functions that enable multiple
Page 32 and 33: An access method is a DFSMSdfp comp
Page 34 and 35: including the operating system itse
Page 36 and 37: 2.3 DFSMSdfp data set types Data se
Page 38 and 39: 2.4 Types of VSAM data sets Types o
Page 40 and 41: Partitioned data set (PDS) Partitio
Page 42 and 43: ► Extended-addressability, which
Page 44 and 45: method writes data on the first vol
Page 46 and 47: SMS calculates the average preferen
Page 48 and 49: Restriction: The following types of
Page 50 and 51: ► REXX LISTDSI function ► CLIST
Page 52 and 53: Using CLIST OPENFILE INPUT/GETFILE
Page 54 and 55: 2.12 z/OS UNIX files Following are
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Logical records and blocks To an ap
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2.14 Locating an existing data set
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2.15 Uncataloged and cataloged data
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2.17 VTOC and DSCBs VTOC DSCBs Figu
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2.18 VTOC index structure VOLUME LA
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2.19 Initializing a volume using IC
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52 ABCs of z/OS System Programming
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3.1 Traditional DASD capacity 885 C
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Large volume support design conside
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DASD virtual visibility Traditional
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3.4 WLM controlling PAVs zSeries WL
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3.5 Parallel Access Volumes (PAVs)
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3.6 HyperPAV feature for DS8000 ser
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For each z/OS image within the sysp
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Note: With the 3390 Model A, the mo
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Note the following points regarding
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EAS non-eligible data sets An EAS-i
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same as for previous 3390 model dev
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3.13 Using dynamic volume expansion
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3.15 Using Web browser GUI Need a U
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3.17 Increase capacity of volumes F
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3.19 Final capacity increase for vo
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VTOC index changes The index block
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The documentation is in Device Supp
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free space available following the
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Note: The refresh of the index occu
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Updating the VTOC following volume
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USEEAV(YES|NO) YES This means that
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Generally, for VSAM data set alloca
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attributes can reside in the extend
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Other methods for EATTR specificati
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3.30 Migration assistance tracker T
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3.31 Migration tracker commands SET
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4.1 Overview of DFSMSdfp utilities
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4.2 IEBCOMPR utility Example 1 Exam
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4.3 IEBCOPY utility //COPY JOB ...
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4.4 IEBCOPY: Copy operation DATA.SE
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4.5 IEBCOPY: Compress operation DAT
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Copying to z/OS UNIX IEBGENER can b
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4.8 IEBGENER: Copying data to tape
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4.10 IEHLIST LISTVTOC output CONTEN
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Examples of IEHINITT In the example
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4.13 DFSMSdfp access methods DFSMSd
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physical blocks. QSAM also guarante
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The automatic class selection (ACS)
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Command Functions DEFINE PAGESPACE
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Note: These commands cannot be used
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► Capacity planning: Capacity pla
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A GDS has sequentially ordered abso
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The parameters are: NAME This speci
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4.21 Relative generation numbers A.
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4.23 PDS data set organization Adva
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4.24 Partitioned data set extended
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4.25 PDSE enhancements PDSE, two ad
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4.26 PDSE: Conversion Using DFSMSds
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4.27 Program objects in a PDSE Func
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4.28 Sequential access methods Sequ
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4.29 z/OS V1R9 QSAM - BSAM enhancem
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4.30 Virtual storage access method
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4.31 VSAM terminology Logical recor
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4.32 VSAM: Control interval (CI) LR
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4.33 VSAM data set components Clust
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4.34 VSAM key sequenced cluster (KS
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The sequence is as follows: 1. VSAM
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4.37 VSAM: Typical ESDS processing
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4.39 VSAM: Typical RRDS processing
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4.41 VSAM: Data-in-virtual (DIV) DI
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4.43 VSAM resource pool VSAM resour
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► CIs are discarded as soon as th
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SMB processing techniques If all of
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MSG=SMBBIAS When you specify MSG =
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4.47 VSAM SMB enhancement with z/OS
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4.48 VSAM enhancements Data compres
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4.50 Data set separation syntax Dat
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4.51 Data facility sort (DFSORT) Pa
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4.52 z/OS Network File System (z/OS
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4.53 DFSMS optimizer (DFSMSopt) Fig
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4.54 Data Set Services (DFSMSdss) /
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4.55 DFSMSdss: Physical and logical
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When to use logical processing Use
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When to use physical processing Use
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4.59 Hierarchical Storage Manager (
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Tasks for availability management f
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- Release of unused, over-allocated
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usually slower response time. Usual
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DATASSETSIZE(dssize) This specifies
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► Utilize OVERFLOW volumes for mi
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Before automatic secondary space ma
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For data sets larger than 58 K trac
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► Migration level 1 (ML1) volumes
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value of a user-specified RETPD or
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The second-newest version is treate
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If the version has a specified rete
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ACS routines For both automatic and
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- System-managed automated tape lib
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4.75 What DFSMSrmm can manage Remov
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You can also use the DFSMSrmm built
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z/OS V1R8 enhancements DFSMSrmm hel
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5.1 Storage management ISMF dss Fig
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5.3 Goals and benefits of system-ma
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Improved data availability manageme
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► Whether data sets are to be kep
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When the ACS routines are started a
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5.7 Assigning data to be system-man
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Even though data class is optional,
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You can use the ACCESSIBILITY attri
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If you do not explicitly assign a m
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5.12 Using storage groups DFSMShsm-
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5.13 Using aggregate backup and rec
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5.14 Automatic Class Selection (ACS
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5.15 SMS configuration An SMS confi
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5.16 SMS control data sets SMS Figu
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5.17 Implementing DFSMS Enabling th
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► Gain experience with the operat
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Specify SHAREOPTIONS(3,3) for the A
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Defining the SMS base configuration
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5.21 Creating ACS routines Storage
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5.22 DFSMS setup for z/OS IEASYSxx
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5.23 Starting SMS and activating a
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5.24 Control SMS processing with op
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5.25 Displaying the SMS configurati
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exception. If it is clear that a PD
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sets (see Figure 5-27 on page 287).
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Using a high level qualifier (HLQ)
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5.30 Establishing installation stan
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5.32 Data class attributes Data cla
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5.34 Simplifying JCL use Figure 5-3
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► The AVGREC attribute indicates
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Considerations when specifying spac
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5.38 SMS PDSE support SMS PDSE supp
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5.40 Allocating new PDSEs //ALLOC E
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Production batch refers to data cre
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tape are stored as a tape data set
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5.44 ISMF: Product relationships IS
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5.45 ISMF: What you can do with ISM
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5.46 ISMF: Accessing ISMF Panel Hel
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5.48 ISMF: Obtaining information ab
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5.49 ISMF: Data set option Figure 5
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5.51 ISMF: Management Class option
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5.53 ISMF: Storage Class option Fig
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6.1 Catalogs ICF structure 1 ICF st
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6.2 The basic catalog structure (BC
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6.3 The VSAM volume data set (VVDS)
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6.4 Catalogs by function SYSCAT VOL
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User catalogs The difference betwee
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Multilevel aliases You can augment
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Defining a cataloged data set When
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The example in Figure 6-9 on page 3
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6.8 Using multiple catalogs CATALOG
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If you need to share data sets acro
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► List a user catalog connector i
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Note: When you delete a data set, t
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DELET6 JOB ... //STEP1 EXEC PGM=IDC
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Note: The command will result in er
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You can later recover the backup co
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Aliases to the catalog can be defin
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► Physical errors The records on
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Because APF authorization is establ
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3. Use EXAMINE and DIAGNOSE to ensu
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5. Use REPRO MERGECAT to split the
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The two types of buffer are used to
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Catalog report output This MODIFY c
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Restarting the catalog address spac
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► MODIFY CATALOG,LIST The LIST co
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Recover from performance slow downs
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2. Define or alter your existing ca
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7.1 VSAM share options Share option
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7.2 Base VSAM buffering Three types
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7.3 Base VSAM locking Figure 7-3 Ex
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7.5 VSAM record-level sharing intro
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► Non-CICS jobs can have read-onl
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7.8 Buffering under VSAM RLS CICS R
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7.9 VSAM RLS locking control interv
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7.10 VSAM RLS/CICS data set recover
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7.11 Transactional recovery Commite
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7.13 VSAM RLS implementation Update
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Cache structures Coupling Facility
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7.15 Update PARMLIB with VSAM RLS p
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7.16 Define sharing control data se
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Tip: Place the SHCDSs on separate v
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Command ===> Figure 7-22 CF cache u
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7.18 Update data sets with log para
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7.19 The SMSVSAM address space RLS
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7.20 Interacting with VSAM RLS Inte
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To learn about other DISPLAY comman
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to use this specification or the sp
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► RECOVERY REQUIRED This field in
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DFSMStvs is a follow-on project/cap
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Like CICS, DFSMStvs does not perfor
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It is RRS that provides the means t
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7.27 Unit of work and unit of recov
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► Log of logs (optional, shared w
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7.30 Application considerations Bre
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7.31 DFSMStvs logging implementatio
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LABEL JOB ... //STEP10 EXEC PGM=IXC
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7.33 Update PARMLIB with DFSMStvs p
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7.34 The DFSMStvs instance CICSA R/
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Changes to parameters other than AK
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7.36 Summary Figure 7-48 Summary Ba
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8.1 Overview of DASD types Traditio
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8.2 Redundant array of independent
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8.3 Seascape architecture Powerful
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► Data copy sharing Data copy sha
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NVS cache NVS is used to store a se
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8.6 ESS major components Figure 8-6
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8.8 FICON host adapters FICON host
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8.9 ESS disks Eight-packs Set of 8
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8.10 ESS device adapters SSA 160 De
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8.11 SSA loops SSA operation 4 link
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8.12 RAID-10 RAID-10 configurations
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8.13 Storage balancing with RAID-10
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Peer-to-peer remote copy (PPRC) PPR
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8.15 ESS performance features Prior
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8.16 IBM TotalStorage DS6000 Enterp
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DS6000 expansion enclosure (Model 1
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support for one or two expansion fr
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The DS8300 models can support eithe
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consolidations where separate stora
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Copy Services include the following
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TotalStorage Expert helps storage a
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identifying the data set and descri
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Table 8-4 Types of labels Code Mean
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equired. Therefore, the resulting t
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Drive designed for automation solut
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3494 models and features IBM 3494 o
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Each FICON channel in the VTS can s
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In addition to the 3494 VTS compone
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► Consolidation Another benefit i
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Online resources ► z/OS DFSMShsm
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