Sun Fire V445 Server Administration Guide - SCN Research

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On the Sun Fire V445 server, you can configure hardware disk mirroring using the SAS controller. This provides higher performance than with conventional software mirroring using volume management software. For more information, see: ■ “Creating a Hardware Disk Mirror” on page 118 ■ “Deleting a Hardware Disk Mirror” on page 120 ■ “Performing a Mirrored Disk Hot-Plug Operation” on page 121 RAID 5 – Disk Striping With Parity RAID 5 is an implementation of disk striping in which parity information is included with each disk write. The advantage of this technique is that if any one disk in a RAID 5 array fails, all the information about the failed drive can be reconstructed from the data and parity on the remaining disks. System performance using RAID 5 will fall between that of RAID 0 and RAID 1. However, RAID 5 provides limited data redundancy. If more than one disk fails, all data is lost. Hot-Spares In a hot-spares arrangement, one or more disk drives are installed in the system but are unused during normal operation. This configuration is also referred to as hot relocation. Should one of the active drives fail, the data on the failed disk is automatically reconstructed and generated on a hot-spare disk, enabling the entire data set to maintain its availability. About Hardware Disk Mirroring On the Sun Fire V445 server, the SAS controller supports internal hardware disk mirroring using the Solaris OS raidctl utility. A hardware disk mirror created under the raidctl utility behaves slightly differently than one created using volume management software. Under a software mirror, each device has its own entry in the virtual device tree, and read-write operations are performed to both virtual devices. Under hardware disk mirroring, only one device (the master) appears in the device tree. The mirrored device (the slave) is invisible to the OS, and is accessed only by the SAS controller. 116 Sun Fire V445 Server Administration Guide • August 2006
Caution – Creating or restoring a disk mirror destroys all data previously stored on the disk drive. About Physical Disk Slot Numbers, Physical Device Names, and Logical Device Names In order to perform a disk hot-plug procedure, you must know the physical or logical device name for the drive that you want to install or remove. If your system encounters a disk error, often you can find messages about failing or failed disks in the system console. This information is also logged in the /var/adm/messages file(s). These error messages typically refer to a failed hard disk drive by its physical device name (such as /devices/pci@1f,700000/scsi@2/sd@1,0) or by its logical device name (such as c1t1d0). In addition, some applications might report a disk slot number (0 through 3). You can use TABLE 6-1 to associate internal disk slot numbers with the logical and physical device names for each hard disk drive. Disk Slot Number TABLE 6-1 Logical Device Name * Disk Slot Numbers, Logical Device Names, and Physical Device Names Physical Device Name Slot 0 c1t0d0 /pci@1f,700000/pci@0/pci@2/pci@0/pci@8/LSILogic,sas@1/sd@0,0 Slot 1 c1t1d0 /pci@1f,700000/pci@0/pci@2/pci@0/pci@8/LSILogic,sas@1/sd@1,0 Slot 2 c1t2d0 /pci@1f,700000/pci@0/pci@2/pci@0/pci@8/LSILogic,sas@1/sd@2,0 Slot 3 c1t3d0 /pci@1f,700000/pci@0/pci@2/pci@0/pci@8/LSILogic,sas@1/sd@3,0 Slot 4 c1t4d0 /pci@1f,700000/pci@0/pci@2/pci@0/pci@8/LSILogic,sas@1/sd@4,0 Slot 5 c1t5d0 /pci@1f,700000/pci@0/pci@2/pci@0/pci@8/LSILogic,sas@1/sd@5,0 Slot 6 c1t6d0 /pci@1f,700000/pci@0/pci@2/pci@0/pci@8/LSILogic,sas@1/sd@6,0 Slot 7 c1t7d0 /pci@1f,700000/pci@0/pci@2/pci@0/pci@8/LSILogic,sas@1/sd@7,0 * The logical device names might appear differently on your system, depending on the number and type of add-on disk controllers installed. Chapter 6 Managing Disk Volumes 117
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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
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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 and 140: Sun StorEdge Traffic Manager A newe
Page 141: RAID 0 - Disk Striping Disk stripin
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
Page 191 and 192: 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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