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Lucent Technologies 585-210-940 manual Replace the faulty disk drive, Maintaining Mirrored Systems

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Step 5: Replace the faulty disk drive

Maintaining Mirrored Systems	CentreVu CMS Release 3 Version 8 Disk-Mirrored Systems
Replacing a faulty disk	72

Step 4: Remove state database replicas (boot disks only)

When you replace a boot disk, you must remove the state database replicas from the old disk and recreate them on the new one. A boot disk is one that is a member of metadevice d11 or d12 (see “Step 2: Identify the submirrors” on page 70).

If you fail to remove old replicas, the software will have an inaccurate picture of the replicas existing on your system and will attempt to write to nonexistent database replica files.Match up the device description lines to determine which disk drive has problems.

In general, the procedure is a three-step process:

1.Issue a metadb -icommand to find out which replicas to remove.

2.Issue a metadb -dcommand to do the actual deletion.

3.Issue another metadb -icommand to verify the deletion.

If the faulty disk were c0t1d0, for example, the replica deletion might resemble the following series of commands and responses:

#metadb -i

flags			first blk	block count
a m	p	luo	16	1034	/dev/dsk/c0t0d0s1
a	p	luo	1050	1034	/dev/dsk/c0t0d0s1
a	p	luo	2084	1034	/dev/dsk/c0t0d0s1
a	p	luo	3118	1034	/dev/dsk/c0t0d0s1
a	p	luo	16	1034	/dev/dsk/c1t4d0s1
a	p	luo	1050	1034	/dev/dsk/c1t4d0s1
a	p	luo	2084	1034	/dev/dsk/c1t4d0s1

#metadb -d c1t4d0s1

#metadb -i

	flags		first blk	block count
a m	p	luo	16	1034	/dev/dsk/c0t0d0s1
a	p	luo	1050	1034	/dev/dsk/c0t0d0s1
a	p	luo	2084	1034	/dev/dsk/c0t0d0s1
a	p	luo	3118	1034	/dev/dsk/c0t0d0s1

Step 5: Replace the faulty disk drive

1.Remove the faulty disk drive.

2.Install the new disk drive into the same slot the faulty drive came out of. For installation instructions, see the documentation that came with the disk drive or the Lucent hardware installation manual.

3.Partition the new disk using the format command. See “Partitioning disks with the format command” on page 76 . Make sure you partition the new disk drive!

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Lucent Technologies 585-210-940 manual Replace the faulty disk drive, Maintaining Mirrored Systems

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 d17 d16 Introduction to Disk Mirroringd13 d12 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 #metaroot d13 hostname login rootPassword password # # /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 Enterprise Step 1 Install the hardwareStep 2 Install the operating system 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 SystemsActivating chkDisks Verifying chkDisks Canceling chkDisksMaintaining the chkDisks crontab Changing the scheduled run timeStep 1 Print the vfstab file Doing a CMSADM backup on a mirrored systemStep 2 Run the backup 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 Task Step 3 Boot the system from the compact diskMaintaining Mirrored Systems ActionTask Step 4 Identify the systemMaintaining Mirrored Systems ActionTask Step 5 Set the Name Service optionsMaintaining Mirrored Systems ActionTask Step 6 Set the date and timeMaintaining Mirrored Systems ActionAction Maintaining Mirrored SystemsTask ResultStep 9 Set up the disk partitions Step 8 Select the hard disksSizes in Slice numbersNames in this columnTask Step 10 Install the operating systemMaintaining Mirrored Systems ActionTask Step 11 Complete the OS installationMaintaining Mirrored Systems ActionStep 13 Restore the backup Step 14: Reestablish the disk mirrorshostname login root Maintaining Mirrored Systems 8.Set up the root mirror9. Get to the boot prompt 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 Root Metadevice Device Names Maintaining Mirrored Systemsb.Edit the /etc/opt/SUNWmd/md.tab file MetadeviceExamples of valid system files Valid vfstab filesValid md.tab files Troubleshooting4 Excessively long resyncSolstice DiskSuite problems probe-scsi-all The system fails to recognize all disk drivesTroubleshooting probe-fcal-allconsole login root Password ok setenv auto-boot?trueok boot -r 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 TroubleshootingFile Name Log filesTroubleshooting DescriptionError Messages Error messagesTroubleshooting Message Explanation ResponseMessage Explanation Response TroubleshootingError Messages Continued Message Explanation ResponseTroubleshooting Troubleshooting filename restored from filebackup TroubleshootingMessage Response TroubleshootingError Messages Continued Message ResponseMessage Explanation Response TroubleshootingError Messages Continued Message ResponseMessage Response TroubleshootingError Messages Continued Message Explanation ResponseTroubleshooting Symbols Indexupgrading partitioningtape drives and increasing system capacityHow Are We Doing?