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9.5

Best way to perform full system backup for a Solaris with Mirror Setup

Asked by frankcheong in Sun Solaris, Backup & Restore Software, Disaster Recovery

I have to perform a full system backup for a Solaris 8 machine (SUNFire 280R) with mirror setup on all partitions and would like to know what is the best way to perform a full system backup on such system such that we can use this full system backup tape as DR in the future. Pls find below the system setting FYI:-

root@server # df -k
Filesystem            kbytes    used   avail capacity  Mounted on
/dev/md/dsk/d0       2033311 1620541  351771    83%    /
/proc                      0       0       0     0%    /proc
mnttab                     0       0       0     0%    /etc/mnttab
fd                         0       0       0     0%    /dev/fd
swap                 15247032      32 15247000     1%    /var/run
swap                 15247000       0 15247000     0%    /tmp
/dev/md/dsk/d3       10327372 9967329  256770    98%    /u01
/dev/md/dsk/d5       17734538 17525339   31854   100%    /u03
/dev/md/dsk/d4       10327372 6770750 3453349    67%    /u02
/dev/md/dsk/d6       17734538 9787650 7769543    56%    /u04

root@server # metadb -i
        flags           first blk       block count
     a m  p  luo        16              8192            /dev/dsk/c1t0d0s7
     a    p  luo        8208            8192            /dev/dsk/c1t0d0s7
     a    p  luo        16              8192            /dev/dsk/c1t1d0s7
     a    p  luo        8208            8192            /dev/dsk/c1t1d0s7
 r - replica does not have device relocation information
 o - replica active prior to last mddb configuration change
 u - replica is up to date
 l - locator for this replica was read successfully
 c - replica's location was in /etc/lvm/mddb.cf
 p - replica's location was patched in kernel
 m - replica is master, this is replica selected as input
 W - replica has device write errors
 a - replica is active, commits are occurring to this replica
 M - replica had problem with master blocks
 D - replica had problem with data blocks
 F - replica had format problems
 S - replica is too small to hold current data base
 R - replica had device read errors

root@server # cat md.cf
# metadevice configuration file
# do not hand edit
d6 -m d16 d26 1
d16 1 1 c1t0d0s6
d26 1 1 c1t1d0s6
d5 -m d15 d25 1
d15 1 1 c1t0d0s5
d25 1 1 c1t1d0s5
d4 -m d14 d24 1
d14 1 1 c1t0d0s4
d24 1 1 c1t1d0s4
d3 -m d13 d23 1
d13 1 1 c1t0d0s3
d23 1 1 c1t1d0s3
d1 -m d11 d21 1
d11 1 1 c1t0d0s1
d21 1 1 c1t1d0s1
d0 -m d10 d20 1
d10 1 1 c1t0d0s0
d20 1 1 c1t1d0s0

Pls comment which of the method below is the best way to perform full system backup for such a system such that we can use this full system backup tape as DR in the future.

Method 1.
Boot to single user mode using CD (boot cdrom -s) and execute the below script.
---SCRIPT---
#!/usr/bin/sh
# Backup replicas
/usr/sbin/ufsdump 0ucf /dev/rmt/0n /dev/rdsk/c1t0d0s7
/usr/sbin/ufsdump 0ucf /dev/rmt/0n /dev/rdsk/c1t1d0s7
# Backup /
/usr/sbin/ufsdump 0ucf /dev/rmt/0n /dev/rdsk/c1t0d0s0
# Backup /u01
/usr/sbin/ufsdump 0ucf /dev/rmt/0n /dev/rdsk/c1t0d0s3
# Backup /u02
/usr/sbin/ufsdump 0ucf /dev/rmt/0n /dev/rdsk/c1t0d0s4
# Backup /u03
/usr/sbin/ufsdump 0ucf /dev/rmt/0n /dev/rdsk/c1t0d0s5
# Backup /u04
/usr/sbin/ufsdump 0ucf /dev/rmt/0n /dev/rdsk/c1t0d0s6
---SCRIPT---

Method 2.
Boot to single user mode (boot -s) and execute the below script.
---SCRIPT---
#!/usr/bin/sh
# Backup replicas
/usr/sbin/ufsdump 0ucf /dev/rmt/0n /dev/rdsk/c1t0d0s7
/usr/sbin/ufsdump 0ucf /dev/rmt/0n /dev/rdsk/c1t1d0s7
# Backup /
/usr/sbin/ufsdump 0ucf /dev/rmt/0n /dev/md/rdsk/d0
# Backup /u01
/usr/sbin/ufsdump 0ucf /dev/rmt/0n /dev/md/rdsk/d3
# Backup /u02
/usr/sbin/ufsdump 0ucf /dev/rmt/0n /dev/md/rdsk/d4
# Backup /u03
/usr/sbin/ufsdump 0ucf /dev/rmt/0n /dev/md/rdsk/d5
# Backup /u04
/usr/sbin/ufsdump 0ucf /dev/rmt/0n /dev/md/rdsk/d6
---SCRIPT---

Method 3.
Offline the mirror and perform full backup using the script below. But what about the root partition? From the DiskSuite Administrator Guide, it told me that I cannot offline the mirror for root parition. What should I do then?
---SCRIPT---
#!/usr/bin/sh
# Lock the file system from write access for /u01
/usr/sbin/lockfs -w /u01
# Lock the file system from write access for /u02
/usr/sbin/lockfs -w /u02
# Lock the file system from write access for /u03
/usr/sbin/lockfs -w /u03
# Lock the file system from write access for /u04
/usr/sbin/lockfs -w /u04
# Offline the metamirror for /u01
/usr/sbin/metaoffline /dev/md/dsk/d13
# Offline the metamirror for /u02
/usr/sbin/metaoffline /dev/md/dsk/d14
# Offline the metamirror for /u03
/usr/sbin/metaoffline /dev/md/dsk/d15
# Offline the metamirror for /u04
/usr/sbin/metaoffline /dev/md/dsk/d16
# Backup replicas
/usr/sbin/ufsdump 0ucf /dev/rmt/0n /dev/rdsk/c1t0d0s7
/usr/sbin/ufsdump 0ucf /dev/rmt/0n /dev/rdsk/c1t1d0s7
# Backup /u01
/usr/sbin/ufsdump 0ucf /dev/rmt/0 /dev/md/rdsk/d13
# Backup /u02
/usr/sbin/ufsdump 0ucf /dev/rmt/0 /dev/md/rdsk/d14
# Backup /u03
/usr/sbin/ufsdump 0ucf /dev/rmt/0 /dev/md/rdsk/d15
# Backup /u04
/usr/sbin/ufsdump 0ucf /dev/rmt/0 /dev/md/rdsk/d16
### What should I do about the root parition? Is this the right way to perform full backup? Any advantage over other? Why DiskSuite Administrator Guide refer to this method over the others in the backup section?
# Unlock the file system from write access for /u01
/usr/sbin/lockfs -u /u01
# Unlock the file system from write access for /u02
/usr/sbin/lockfs -u /u02
# Unlock the file system from write access for /u03
/usr/sbin/lockfs -u /u03
# Unlock the file system from write access for /u04
/usr/sbin/lockfs -u /u04
# Online the metamirror for /u01
/usr/sbin/metaonline /dev/md/dsk/d13
# Online the metamirror for /u02
/usr/sbin/metaonline /dev/md/dsk/d14
# Online the metamirror for /u03
/usr/sbin/metaonline /dev/md/dsk/d15
# Online the metamirror for /u04
/usr/sbin/metaonline /dev/md/dsk/d16
---SCRIPT---

[+][-]10/06/09 09:54 PM, ID: 25512304Accepted Solution

Your question has an Asker Certified™ answer! frankcheong verified that this solution worked for them--which means it will likely work for you, too. Click to view the solution free for 30-days now.

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Zones: Sun Solaris, Backup & Restore Software, Disaster Recovery
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Solution Provided By: expone
Participating Experts: 1
Solution Grade: A
 
[+][-]10/06/09 10:05 PM, ID: 25512349Author Comment

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