汇总restore和recover 辨析.docx
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汇总restore和recover辨析
GuidelinetorestorerecoveraTru645
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Guidelinetorestore/recoveraTru645.1BClusterfromadisaster（data/storagearegone）
（Thisprocedurecanalsobeusedforstoragemigration）
Reasonofthisdocument
ThisdocumentdescribesoneofthepossibleproceduresusedtorecoveraTru64Unixcluster（actuallybesideVMStheonlyrealone）formatotaldatalosslet’ssaythewholestorageandordataisgone.
Therequiredresourcesarethenewstoragehardwareandnotnecessarybutmakesiteasier,thelocalinstallationdiskcontainingabootableTru64Unixoperatingsystem.Andofcoursetheactuallbackups.
Prerequesites
Forasucessfullrestoreoftheclusterthefollowingbackupsindetailarerequiredonalocaltapecartridge.
Backupmadebyvdumpofthefollowingfilesystems
/
/usr
/var
/cluster/members/member1/boot_partition,
/cluster/members/member2/boot_partition
andofcoursethedatasofyourapplications.
Forsuretarordumpwouldalsowork（yesLegato,Vertiasoranyotherbackupworksaswell,butyouneedtoinstalltherequiredclientonyourInst.diskfirst）
Alistof#hwmgr-viewdevicestofigureoutthemajor,minornumbersofthedisksattachedtothefunctionalcluster.Bythewayit’sallwaysagoodideatohaveanuptodatesys_checkoutput.
Acopyoftheshellscriptcleanup_hwdb.shonthelocalbootableUnixsystemdisk.
BootingtheinstallationdiskandwippingouttheoldHWdatabase
Bootyourlocaldisk（alsoknownastheclusterinstdiskinmostcasesaninternaldiskofclustermember1）
>>>bdkx0
Ifyoudon’thaveanymoreyourinstallationdisk,installtheUnixtoanewdiskandskipthecleanup_hwdbpart
Copyorifalreadythereexecutethescriptcleanup_hwdb.sh（cleansupthedevicedBonthelocalbootdisk）
#./cleanup_hwdb.sh
Thesystemwillbeshutdownbythescript.
BootgenvmunixtosingleusermodethisstepwillcreateanewHWdatabase
>>>bdkx0-figenvmunix-fls
#mountroot（createsallthedevicefiles）
#hwmgr-showscsi
IdentifyandwritedowntheinfosofthenewQuorumdiskandthebootdisks.
Movingthenewdiskstothedisknamestheyhadonthecluster:
#dsfmgr-mdskxdsky
#hwmgr-delcomp-idxx
Writingthedefaultdisklabeltothenewdisks:
#disklabel-wrdsk1（boot-member1）
#disklabel-wrdsk2（boot-member2）
#disklabel-wrdsk3（cluster-rootcluster-usrcluster-var）
#disklabel-wrdsk4（Quorum-disk）
Modifyingthecluster_root,cluster_usrandcluster_varpartitionforyourrequirements（infosfromanuptodatesys_checkoutput）:
Mountusrandvarofyourinstallationdisk
#mount/usr
#mount/var
Settheenvironmentalvariablesrequiredforvi
#exportTERM=vt100
#exportEDITOR=vi
#disklabel-edsk3（adjustthepartitiontoyourrequirements）
Creatingthedomainsforcluster_root,cluster_usrandcluster_varmountingthemandrestoringthevdumps.
Ifthedomaindirectoriesalreadyexists（ontheinstallationdisktheydo）removethemfirst,orusethe-foption.
#mkfdmn/dev/disk/dsk3acluster_root
#mkfsetcluster_rootroot
#mkdir/cluster_rootifnotalreadyexists
#mountcluster_root#root/cluster_root
#vrestore-xf/dev/ntape/tape0-D/cluster_root
#mkfdmn/dev/disk/dsknxcluster_usr
#mkfsetcluster_usrusr
#mkdir/cluster_usrifnotalreadyexists
#mountcluster_usr#usr/cluster_usr
#vrestore-xf/dev/ntape/tape0-D/cluster_usr
#mkfdmn/dev/disk/dsknxcluster_var
#mkfsetcluster_varvar
#mkdir/cluster_varifnotalreadyexists
#mountcluster_var#var/cluster_var
#vrestore-xf/dev/ntape/tape0-D/cluster_var
AdjustingtheAdvFSdomainlinksifthedevicenamingoftherestoredclusterisn’tanymoreasitwasontheoriginalcluster:
#cd/cluster_root/etc/fdmns/cluster_root
#rm*
#ln-s/dev/disk/dsk3a
#cd/cluster_root/etc/fdmns/cluster_usr
#rm*
#ln-s/dev/disk/dsk3d
#cd/cluster_root/etc/fdmns/cluster_var
#rm*
#ln-s/dev/disk/dsk3e
#cd/cluster_root/etc/fdmns/root1_domain
#rm*
#ln-s/dev/disk/dsk1a
#cd/cluster_root/etc/fdmns/root2_domain
#rm*
#ln-s/dev/disk/dsk2a
Creatingtheboot_disks:
Weneedtocreatethebootpartitiona:
theswappartitionb:
andthenCNXpartitionh:
onthenewbootdisks.
#clu_bdmgr-cdsk11
#clu_bdmgr-cdsk22
Restoringandmodifyingmember_boot_partitionofmember1:
#mkdir/root1
#mountroot1_domain#root/root1
#vrestore-xf/dev/ntape/tape0-D/root1
Gettheinfosneededforthememberbootdisksysconfigtab:
#file/dev/disk/dsk1h（member1cnxpartition）/dev/disk/dsk1h:
blockspecial（19/63）
#file/dev/disk/dsk5h（quorumcnxpartition）/dev/disk/dsk5h:
blockspecial（19/111）
#file/dev/disk/dsk3a（clusterrootpartition）/dev/disk/dsk3a:
blockspecial（19/135）
Modify/root1/etc/sysconfigtab:
swapdevice=/dev/disk/dsk1b
cluster_seqdisk_minor=63
cluster_qdisk_minor=111
Restoringandmodifyingmember_boot_partitionofmember2:
#mkdir/root2
#mountroot2_domain#root/root2
#vrestore-xf/dev/ntape/tape0-D/root2
Gettheinfosneededforthememberbootdisksysconfigtab:
#file/dev/disk/dsk2h（member2cnxpartition）/dev/disk/dskxh:
blockspecial（19/64）
#file/dev/disk/dsk5h（quorumcnxpartition）/dev/disk/dskxh:
blockspecial（19/111）
#file/dev/disk/dsk3a（clusterrootpartition）/dev/disk/dskxb:
blockspecial（19/35）
Modify/root2/etc/sysconfigtab:
swapdevice=/dev/disk/dsk2b
cluster_seqdisk_minor=64
cluster_qdisk_minor=111
Adjustingtheclu_bdmgrconfigfile,forthenewcluster_rootdisk:
#cat/root1/etc/clu_bdmgr.conf
#clu_bdmgrconfigurationfile
#DONOTEDITTHISFILE
:
:
TYP:
m:
CFS:
/dev/disk/dskxb:
:
#vi/root1/etc/clu_bdmgr.conf（changedskxntodsk3a）
#vi/root2/etc/clu_bdmgr.conf（changedskxntodsk3a）
DumpingthenewconnectionmanagerinfostothememberbootdisksCNXpartitions:
#clu_bdmgr-hdsk1/root1/etc/clu_bdmgr.conf
#clu_bdmgr-hdsk2/root2/etc/clu_bdmgr.conf
Deletingtheoldmember1specifichwdbonmember1bootdiskandtherestoredcluster_root:
#rm/root1/etc/dec*
#rm/root1/etc/ddr*
#rm/cluster_root/etc/dfsc*
#rm/cluster_root/etc/dec_unid_db*
#rm/cluster_root/etc/dec_hwc_cdb*
#rm/cluster_root/etc/dccd*
#rm/cluster_root/etc/dcdd*
#rm/cluster_root/cluster/members/member1/.Booted
#rm/cluster_root/cluster/members/member1/etc/dfsl*
#rm/cluster_root/cluster/members/member1/etc/cfginfo
#rm/cluster_root/cluster/members/member1/dev/tty0*
#rm/cluster_root/cluster/members/member1/dev/lp*
#rm/cluster_root/cluster/members/member1/dev/kevm*
#rm/cluster_root/cluster/members/member1/dev/scp*
#rm/cluster_root/cluster/members/member1/dev/disk
#rm/cluster_root/cluster/members/member1/dev/rdisk
#rm/cluster_root/cluster/members/member1/dev/ntape
#rm/cluster_root/cluster/members/member1/dev/tape
#rm-R/cluster_root/devices/disk
#rm-R/cluster_root/devices/rdisk
#rm-R/cluster_root/devices/tape
#rm-R/cluster_root/devices/ntape
Copyingtheadjustedhwdbfromtheinstallationdisktothemember1bootdiskandthecluster_rootdisk:
#cp/etc/dfsc*/cluster_root/etc/
#cp/etc/dec_unid_db*/cluster_root/etc/
#cp/etc/dec_hwc_cdb*/cluster_root/etc/
#cp/etc/dccd*/cluster_root/etc/
#cp/etc/dcdd*/cluster_root/etc/
#cp/etc/ddr*/root1/etc/
#cp/etc/dec_devsw*/root1/etc/
#cp/etc/dec_hw_db*/root1/etc/
#cp/etc/dec_hwc_ldb*/root1/etc/
#cp/etc/dec_scsi*/root1/etc/
#cp/etc/dfsl*/cluster_root/cluster/members/member1/etc/
#cp/etc/cfginfo/cluster_root/cluster/members/member1/etc/
Modifyingthedisklabelsonthebootdisksfortheswappartitions:
Ifyourdecidedswapsizeislargerthan8GByoumayneedtoadjustpartitionb:
ofyournewmemberbootdisks
Shutdownthesystemandbootthesystemfromthemember1bootdisk1:
I’msureyouneedtoadjustyourWWIDMGRconfigifyouuseFiberstorage:
wwidmgr-quicksetandsoon…
#shutdown-hnow
>>>b-fl"is"-figenvmunixdkxn
PressReturntobootdefaultkernel'genvmunix':
genvmunixclubase:
cluster_expected_votes=1
clubase:
cluster_qdisk_votes=0
Ignoresomeerrormessagesaboutmagicnumbersandthenotfoundswappartition
#mountroot
#dsfmgr-vFV（verifiesandfixesHWdBfiles）
#mount-a（Ignoreerrormessagesaboutthefilesystemsnormallycontainingyourapplicationdatas.
#init3
Logintosystem:
#clu_get_info
#clu_quorum
Deletingtheoldmember2specifichwdbonmember2bootdiskandtherestoredcluster_root:
#mountroot2_domain#root/mnt
#rm/mnt/etc/dec*
#rm/cluster/members/member2/.Booted
#rm/cluster/members/member2/etc/dfsl*
#rm/cluster/members/member2/etc/cfginfo
#rm-rf/cluster/members/member2/dev/[a-z]*
#cd/cluster/members/member2/dev/
#./MAKEDEVstd
Creatingandmovingthegenesisdatabaseformember2tomemberbootdisk
Saveboot1cnxpartitiontoafile
#clu_bdmgr-ddsk1>/tmp/dsk1.bd
Dumpthefiletocnxpartitionofmember2
#/usr/sbin/cluster/clu_partmgr-mg/tmp/dsk1.bddsk2
Copythegenesisdatabasetomember2bootdisk
#mv/etc/dec_hwc_genesis*/mnt/etc/
Bootingmember2genvmunix
#cd/
#umount/mnt
>>>b-fl"is"-figenvmunixdkxy
PressReturntobootdefaultkernel'genvmunix':
genvmunixclubase:
cluster_expected_votes=1
clubase:
cluster_qdisk_votes=0
youmaysafelyignoremessagesaboutenumerateadvfsdevts
#mountrootcreatesthelocaldevices
#dsfmgr-K
#dsfmgr-vFV
#hwmgrshowscsi（verifythedevices）
#^d（bootsystemto
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