Sun Fire V445 Server Administration Guide - SCN Research

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About RAID Technology VERITAS Volume Manager and Solstice DiskSuite software support RAID technology to optimize performance, availability, and cost per user. RAID technology reduces recovery time in the event of file system errors, and increases data availability even in the event of a disk failure. There are several levels of RAID configurations that provide varying degrees of data availability with corresponding trade-offs in performance and cost. This section describes some of the most popular and useful of those configurations, including: ■ Disk concatenation ■ Disk striping (RAID 0) ■ Disk mirroring (RAID 1) ■ Disk striping with parity (RAID 5) ■ Hot-spares Disk Concatenation Disk concatenation is a method for increasing logical volume size beyond the capacity of one disk drive by creating one large volume from two or more smaller drives. This lets you create arbitrarily large partitions. Using this method, the concatenated disks are filled with data sequentially, with the second disk being written to when no space remains on the first, the third when no space remains on the second, and so on. 114 Sun Fire V445 Server Administration Guide • August 2006
RAID 0 – Disk Striping Disk striping (RAID 0) is a technique for increasing system throughput by using several disk drives in parallel. In nonstriped disks the OS writes a single block to a single disk. In a striped arrangement, each block is divided and portions of the data are written to different disks simultaneously. System performance using RAID 0 will be better than using RAID 1 or 5, but the possibility of data loss is greater because there is no way to retrieve or reconstruct data stored on a failed disk drive. RAID 1 – Disk Mirroring Disk mirroring (RAID 1) is a technique that uses data redundancy – two complete copies of all data stored on two separate disks – to protect against loss of data due to disk failure. One logical volume is duplicated on two separate disks. Whenever the OS needs to write to a mirrored volume, both disks are updated. The disks are maintained at all times with exactly the same information. When the OS needs to read from the mirrored volume, it reads from whichever disk is more readily accessible at the moment, which can result in enhanced performance for read operations. RAID 1 offers the highest level of data protection, but storage costs are high, and write performance compared to RAID 0 or RAID 5 is reduced since all data must be stored twice. Chapter 6 Managing Disk Volumes 115
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Sun Fire V445 Server Administratio
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Contents Preface xxi 1. System Over
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Ways of Reaching the sc> Prompt 32
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Memory Interleaving 70 Independent
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▼ To Enable the Hardware Watchdog
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Reference for Estimating System Boo
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About Sun Management Center 204 How
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Reference for Clearance and Service
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Figures FIGURE 1-1 Front Panel Feat
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Tables TABLE 1-1 Sun Fire V445 Serv
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Preface The Sun Fire V445 Server Ad
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Typographic Conventions TABLE P-1 T
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http://www.sun.com/hwdocs/feedback
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CHAPTER 1 System Overview This chap
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TABLE 1-1 Feature Sun Fire V445 Ser
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RAID 0,1 Internal Hard Drives Inter
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technology enables Sun systems to a
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For information about front panel c
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For hard disk drive indicator descr
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SAS Disk Drives The system has up t
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Locating Back Panel Features The il
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PCI0 PCI1 PCI6 PCI7 PCI2 PCI3 PCI5
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Serial Management Port The serial m
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Reliability, Availability, and Serv
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CHAPTER 2 Configuring the System Co
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TABLE 2-1 Ways of Communicating Wit
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Default System Console Connection T
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Access Through the Network Manageme
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About the sc> Prompt The ALOM syste
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About the ok Prompt A Sun Fire V445
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L1-A (Stop-A) Keys or Break Key Whe
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System Console ok NET MGT or SERIAL
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4. Refer to TABLE 2-2 for instructi
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Note - The network management port
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
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2. To cause the changes to take eff
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3. In a shell tool window on the Su
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Modifying the /etc/remote File This
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Accessing the System Console With a
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If you have redirected the system c
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6. Obtain the ok prompt. For more i
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CHAPTER 3 Powering On and Powering
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Powering On the Server Locally Do n
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Caution - Applications running on t
Page 89 and 90: the OS to recognize the configurati
Page 91 and 92: If the system encounters a problem
Page 93 and 94: CHAPTER 4 Configuring Hardware This
Page 95 and 96: 1 0 1 0 DIMM group 1 DIMM group 0 F
Page 97 and 98: DIMM Configuration Rules ■ ■
Page 99 and 100: Caution - Although access to the AL
Page 101 and 102: ■ your configuration requires a h
Page 103 and 104: PCI0 PCI1 PCI6 PCI7 PCI3 PCI2 PCI5
Page 105 and 106: About the SAS Backplane The Sun Fir
Page 107 and 108: For additional information, see “
Page 109 and 110: The Solaris Volume Manager software
Page 111 and 112: A power supply can be hot-swapped o
Page 113 and 114: FIGURE 4-7 System Fan Trays and Fan
Page 115 and 116: About the USB Ports The system fron
Page 117 and 118: CHAPTER 5 Managing RAS Features and
Page 119 and 120: power supplies, fan trays, and USB
Page 121 and 122: detects the failure and generates a
Page 123 and 124: (striping with interleaved parity).
Page 125 and 126: For instructions on connecting to t
Page 127 and 128: Viewing Environmental Information U
Page 129 and 130: ● From the ALOM system controller
Page 131 and 132: 4. To view console output as the sy
Page 133 and 134: TABLE 5-1 Device Identifiers and De
Page 135 and 136: ▼ To Enable the Hardware Watchdog
Page 137 and 138: CHAPTER 6 Managing Disk Volumes Thi
Page 139: Sun StorEdge Traffic Manager A newe
Page 143 and 144: Caution - Creating or restoring a d
Page 145 and 146: 2. Type the following command: # ra
Page 147 and 148: 3. To confirm that you have deleted
Page 149 and 150: 4. To check the status of a RAID re
Page 151 and 152: Note that while you can use the Sol
Page 153 and 154: 6. To verify that the new disk driv
Page 155 and 156: CHAPTER 7 Managing Network Interfac
Page 157 and 158: Attaching a Twisted-Pair Ethernet C
Page 159 and 160: During installation of the Solaris
Page 161 and 162: The name of the file you create sho
Page 163 and 164: CHAPTER 8 Diagnostics This chapter
Page 165 and 166: TABLE 8-1 Summary of Diagnostic Too
Page 167 and 168: TABLE 8-2 Component What ALOM Monit
Page 169 and 170: About Status Indicators For a summa
Page 171 and 172: ■ ■ diag-switch? parameter has
Page 173 and 174: TABLE 8-3 OpenBoot Configuration Va
Page 175 and 176: Note that service mode does not cha
Page 177 and 178: When you are deciding whether to en
Page 179 and 180: If you specify settings for neither
Page 181 and 182: If you need to know the approximate
Page 183 and 184: The following sample shows the firm
Page 185 and 186: CODE EXAMPLE 8-1 Executing Power On
Page 187 and 188: System Reset skip_diag System Contr
Page 189 and 190: TABLE 8-6 Summary of Diagnostic Ope
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4. You can also run all tests, type
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To customize an individual test, yo
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The following is sample output from
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show-devs Command The show-devs com
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Use the following web site to inter
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# fmdump TIME UUID SUNW-MSG-ID Jul
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# fmstat module ev_recv ev_acpt wai
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Using the prtconf Command The prtco
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CODE EXAMPLE 8-7 prtdiag Command Ou
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CODE EXAMPLE 8-7 MB/FT0/F0 TACH oka
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The prtfru command can display this
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CODE EXAMPLE 8-12 prtfru -c Command
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When used with the -p option, this
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▼ To View and Set OpenBoot Config
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Using the probe-ide Command To Conf
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If the kernel hangs and the watchdo
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Error Handling Summary Error handli
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Automatic System Restoration User C
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About SunVTS SunVTS is a software s
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TABLE 8-12 SunVTS Test vmemtest env
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TABLE 8-14 Feature Sun Management C
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Interoperability With Third-Party M
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CHAPTER 9 Troubleshooting This chap
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■ ■ Sun System Handbook - A doc
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About Sun Remote Services Net Conne
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Remote Troubleshooting Capabilities
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core dump directory to another loca
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4. Type the df -k1 command to ident
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APPENDIX A Connector Pinouts This a
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Network Management Connector Diagra
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Reference for the USB Connectors Tw
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APPENDIX B System Specifications Th
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TABLE B-2 Electrical Specifications
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Reference for Clearance and Service
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APPENDIX C OpenBoot Configuration V
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TABLE C-1 OpenBoot Configuration Va
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Index Symbols /etc/hostname file, 1
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dual inline memory modules (DIMMs),
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configuring IP address, 41 configur
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SEAM (Sun Enterprise Authentication
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W watchdog, hardware, See hardware
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