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Lucent Technologies 585-210-940 manual Introduction to Disk Mirroring, d13 d12, d17 d16, swap

Models: 585-210-940

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d13

Introduction to Disk Mirroring	CentreVu CMS Release 3 Version 8 Disk-Mirrored Systems
How CMS implements disk mirroring	6

In a CMS computer system with /cms mirrored, root is also mirrored. The root mirror is d13; its submirrors are d11 and d12. For example:

/ (root)

d11

c0t0d0s0

d13

d12

c0t1d0s0

If your computer system is running CMS r3v8, your swap partition is also mirrored. The swap mirror is d17; its submirrors are d15 and d16. For example:

swap

d15

c0t0d0s4

d17

d16

c1t4d0s4

Image 12

Lucent Technologies 585-210-940 manual Introduction to Disk Mirroring, d13 d12, d17 d16, swap

Contents

585-210-940Comcode 108502352 Issue 1 December CentreVu Call Management SystemRelease 3 Version Disk-MirroredSystems Copyright  1999 Lucent Technologies Table of Contents Page Index Page Introduction to Disk Mirroring1 Disk mirroring definedMetadevices Concatenated metadevicesIntroduction to Disk Mirroring Mirrors State databasesIntroduction to Disk Mirroring Solstice DiskSuiteHow CMS implements disk mirroring Introduction to Disk Mirroringd21 d20 Introduction to Disk Mirroring d13 d12d17 d16 swapMirror layouts Enterprisecomputer Enterprise computerIntroduction to Disk Mirroring Required software Additional referencesIntroduction to Disk Mirroring How CMS implements disk mirroringInstalling Mirrored Systems Disk drive slotsIncreasing system capacity Step 1 Identify mirror devicesInstalling Mirrored Systems Installing Mirrored Systems Step 2 Install the mirror disks on an systemEnterprise Installing Mirrored Systems Step 4 Partition the mirror disks Installing Mirrored SystemsInstalling Mirrored Systems Step 5 Create the state database replicas Step 6 Create the md.tab table entriesInstalling Mirrored Systems d x y 1 device Installing Mirrored SystemsInstalling Mirrored Systems hostname login root Password password ##metaroot d13 # /usr/sbin/shutdown -i6 -g0 -yStep 8 Set up the mirrors for the swap space Installing Mirrored SystemsInstalling Mirrored Systems Step 9 Set up the /cms mirror Installing Mirrored SystemsStep 10 Verify disk space Installing Mirrored SystemsDisk Space Verification Step 11 Create an alternate boot device Installing Mirrored SystemsInstalling Mirrored Systems Step 1 Install the hardware Step 2 Install the operating systemEnterprise EnterpriseStep 3 Install the application software Step 4 Check the disk.type file Installing Mirrored SystemsInstalling Mirrored Systems Step 6 Run the setup scripts Installing Mirrored SystemsStep 7 Verify disk space Installing Mirrored SystemsInstalling Mirrored Systems Disk Space VerificationStep 9 Create an alternate boot device Step 8 Install the CMS softwareInstalling Mirrored Systems Installing Mirrored Systems Installing Mirrored Systems Using the alternate boot device Maintaining Mirrored SystemsCanceling chkDisks Maintaining the chkDisks crontabActivating chkDisks Verifying chkDisks Changing the scheduled run timeDoing a CMSADM backup on a mirrored system Step 2 Run the backupStep 1 Print the vfstab file hostname login rootStep 3 Label and store the tapes Maintaining Mirrored SystemsRestoring from a CMSADM Backup Maintaining Mirrored SystemsRestoring from a CMSADM Backup Maintaining Mirrored SystemsRepairing or rebuilding the /cms file system Repairing /cmsRebuilding /cms Maintaining Mirrored Systems Maintaining Mirrored Systems Restoring a mirrored system from a CMSADM backup Step 1 Power off the systemStep 2 Install the new drives Step 3 Boot the system from the compact disk Maintaining Mirrored SystemsTask ActionStep 4 Identify the system Maintaining Mirrored SystemsTask ActionStep 5 Set the Name Service options Maintaining Mirrored SystemsTask ActionStep 6 Set the date and time Maintaining Mirrored SystemsTask ActionMaintaining Mirrored Systems TaskAction ResultStep 9 Set up the disk partitions Step 8 Select the hard disksSlice numbers Names inSizes in this columnStep 10 Install the operating system Maintaining Mirrored SystemsTask ActionStep 11 Complete the OS installation Maintaining Mirrored SystemsTask ActionStep 13 Restore the backup Step 14: Reestablish the disk mirrorshostname login root 8.Set up the root mirror 9. Get to the boot promptMaintaining Mirrored Systems 5.Create md.tab.newhostname login root Password root password Maintaining Mirrored SystemsRestoring specific files from a CMSADM backup Maintaining Mirrored SystemsAdding new disks to a standard mirrored system hostname login root Maintaining Mirrored SystemsMaintaining Mirrored Systems Adding new disks to a nonstandard mirrored system Maintaining Mirrored SystemsMaintaining Mirrored Systems Maintaining Mirrored Systems Replacing a faulty disk Step 1 Identify the faulty diskStep 2 Identify the submirrors Maintaining Mirrored SystemsStep 3 Detach the submirrors metadetach metamirror submirrorStep 5 Replace the faulty disk drive Maintaining Mirrored SystemsStep 6: Recreate the state database replicas Maintaining Mirrored SystemsStep 8 Reboot the system boot disks only Step 7 Reattach the submirrorsSetting up replicas Replacing replicas State Database ReplicasPartitioning disks with the format command Maintaining Mirrored Systems Maintaining Mirrored Systems b.Edit the /etc/opt/SUNWmd/md.tab fileRoot Metadevice Device Names MetadeviceExamples of valid system files Valid vfstab filesValid md.tab files Troubleshooting4 Excessively long resyncSolstice DiskSuite problems The system fails to recognize all disk drives Troubleshootingprobe-scsi-all probe-fcal-allok setenv auto-boot?true ok boot -rconsole login root Password Unit 0 Disk SEAGATE ST34371W SUN4.2G74629737K6748Fixing “needs maintenance” messages TroubleshootingBoot problems Primary boot device is not availableTrying to boot from the wrong device Excessive reboot time TroubleshootingLog files TroubleshootingFile Name DescriptionError messages TroubleshootingError Messages Message Explanation ResponseTroubleshooting Error Messages ContinuedMessage Explanation Response Message Explanation ResponseTroubleshooting Troubleshooting filename restored from filebackup TroubleshootingTroubleshooting Error Messages ContinuedMessage Response Message ResponseTroubleshooting Error Messages ContinuedMessage Explanation Response Message ResponseTroubleshooting Error Messages ContinuedMessage Response Message Explanation ResponseTroubleshooting Symbols Indexpartitioning tape drivesupgrading and increasing system capacityHow Are We Doing?