Step-by-step procedure for ufsdump and ufsrestore of VM encapsulated root disk
Document Body:
PROCEDURE FOR UFSDUMP AND RESTORE OF VM ENCAPSULATED ROOT DISK
assumptions:
1. /etc/vx/reconfig.d/disk.d/cxtxdx/vtoc has been recorded.
OR:
2. A copy of the pre-encapsulation partition map has been recorded.
3. There is a local tape drive
4. Partitions are:
/ 0
swap 1
/usr 5
/var 6
/opt 7
Dump all filesystems to a single tape:
Boot into single-user mode
ok> boot -s
As root:
# ufsdump 0uf /dev/rmt/0n /
# ufsdump 0uf /dev/rmt/0n /usr
# ufsdump 0uf /dev/rmt/0n /var
# ufsdump 0uf /dev/rmt/0 /opt
The above commands will create four ufsdump files on the tape.
SECTION 1- RESTORING FILESYSTEMS FROM TAPE
IN THE EVENT OF A CATASTROPHIC ROOT DISK FAILURE USE THE FOLLOWING
TO RESTORE THE FILESYSTEMS AND BOOT THE SYSTEM.
The following is a quick routine for restoring your file system. This
procedure assumes that you saved your root file system using ufsdump.
This document also assumes that your root filesystem is on c0t3d0s0.
1. Load your Solaris CD-ROM into your CD-ROM player.
2. Boot the CDROM in single-user mode:
ok boot cdrom -sw
3. When you get the Bourne shell prompt, repartition your root file
system using the previously saved pre-encapsulation partition map.
a. use "format" to partition your drive as it was before encapsulation
/etc/vx/reconfig.d/disk.d/cxtxdx/vtoc holds this information
b. use "newfs" to create a file system on c0t3d0s0
example" newfs /dev/rdsk/c0t3d0s0
4. Check your new root file system:
# fsck /dev/rdsk/c0t3d0s0
5. Mount the root file system at your /a mount point:
# mount /dev/dsk/c0t3d0s0 /a
6. Start your restore, but first change directory to the new root file system:
a. cd /a
b. ufsrestore rvf /dev/rmt/0
b. vxrestore -crvf /dev/rmt/0
7. When the restore has completed, remove the restore symbol table and
unmount the new root partition:
a. rm restoresymtable
b. cd /
c. umount /a
8. Check the new root partition one more time:
# fsck /dev/rdsk/c0t3d0s0
9. Install the boot block:
# For Solaris 2.5, 2.5.1, 2.6, 7, or 8
a. cd /usr/platform/
b. To get
easier, embed it in the cd command like this:
* cd /usr/platform/`uname -i`/lib/fs/ufs
* Make sure you are using back quotes around the command.
c. installboot bootblk /dev/rdsk/c0t3d0s0
To restore other filesystem partitions ( usr, var, etc...), follow
steps 3.b-8
SECTION 2 - USING THE MT COMMAND TO FIND THE APPROPRIATE FILES ON TAPE:
TO ACCESS EACH FILE ON THE TAPE YOU MUST ISSUE THE FOLLOWING COMMANDS
WITH THE *n* (no rewind) SWITCH
to access the second file:
# mt -f /dev/rmt/0n fsf 1
(this skips the first file and stops
at the bennining of the second file)
# mt -f /dev/rmt/0 rewind
(to rewind tape to the beginning)
I rewind after each restore so that I don't lose track of which
data I am accessing.
# mt -f /dev/rmt/0n fsf 2
(to access the third file...and so on)
Restore and check each filesystem
DO NOT REBOOT YET!
SECTION 3 - REMOVE THE FILESYSTEMS FROM VOLUME MANAGER CONTROL
Unencapsulate the newly restored disk
Still booted from cdrom......
# mount /dev/dsk/c0t3d0s0 /a
# vi /a/etc/system
remove all rootdev statements
# touch /a/etc/vx/reconfig.d/state.d/install-db
# rm /a/etc/vx/reconfig.d/state/root-done
# cp /a/etc/vfstab.prevm /a/etc/vfstab
VERIFY THAT THE PARTITION MAP IS THE ORIGINAL PRE-ENCAPSULATION MAP
AND THAT /ETC/VFSTAB IS CORRECT.
# umount /a
# fsck /dev/rdsk/c0t3d0s0
REBOOT
# reboot
SECTION 4 - RE-ENCAPSULATE THE ROOT DISK THEN RE-MIRROR
Procedure for encapsulating the rootdisk without going through the
sometimes lengthy process of running 'vxinstall'.
This procedure should NOT be used if you have an existing rootdg
diskgroup that you want to preserve, since this procedure creates
a *new* rootdg diskgroup containing only the encapsulated root disk.
Document Body: Top
MANUALLY ENCAPSULATING THE ROOT DISK - FROM THE COMMAND LINE
# vxiod set 10
For ver 3.2 you will need to modload vxdmp:
# modload /kernel/drv/vxdmp
or
# modload /kernel/drv/sparcv9/vxdmp
# vxconfigd -m disable -k
# vxdctl init
# vxdg init rootdg
# /usr/lib/vxvm/bin/vxencap rootdisk=c#t#d#
* If there was another disk in rootdg, use fmthard to remove the
public and private regions (be very careful with fmthard):
# fmthard -d 4:0:0:0:0 /dev/rdsk/c#t#d#s2
# fmthard -d 3:0:0:0:0 /dev/rdsk/c#t#d#s2
# init 0
* Make sure your boot-device is set correctly
ok boot
-------------------------------------------------------------------------------------------------------------------------------------------------------------
SOLARIS - opções do boot (ok) - SPARC
ok> boot -> boot normal no disco default de root
ok> boot -r -> reconfiguração dos devices (/dev e /devices)
ok> boot -x -> boot fora do modo de cluster
ok> boot -a -> boot interativo
ok> boot -v -> boot em modo verbose
ok> boot -m verbose -> mostra passo-a-passo os processos iniciados pelo SMF
Essas opções podem ser combinadas: boot -arvm verbose
Nenhum comentário:
Postar um comentário