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mksysb advice
- Thread starter desbo
- Start date
hi,
a mksysb is not a snapshot of your system in a istant:
it is built in 3 essential steps
1) write boot image on tape ( no problem if user ... )
2) build image.data ( no relevant if user ... )
3) make a list of all files ( find / > /tmp/list )
4) an oper as: cat /tmp/list | backup -ivpf /dev/rmt0
more or less !
If between step 3 and 4 user create or delete files,
in mksysb will not go new files (no error report),
and some error will be reported becouse file in /tmp/list
are not found on system.
Conclusion:
A) a mksysb with user working is better than nothing
B) a mksysb with: no user, errclear 0,... is the best.
BYE
a mksysb is not a snapshot of your system in a istant:
it is built in 3 essential steps
1) write boot image on tape ( no problem if user ... )
2) build image.data ( no relevant if user ... )
3) make a list of all files ( find / > /tmp/list )
4) an oper as: cat /tmp/list | backup -ivpf /dev/rmt0
more or less !
If between step 3 and 4 user create or delete files,
in mksysb will not go new files (no error report),
and some error will be reported becouse file in /tmp/list
are not found on system.
Conclusion:
A) a mksysb with user working is better than nothing
B) a mksysb with: no user, errclear 0,... is the best.
BYE
hi,
also it is best to backup just the root filesystem when doing a mksysb rather than the whole lot i.e. other filesystems etc.. to avoid this you can create a file in
/etc/ called exclude.rootvg ( more info do man mksysb)
so you back up / , tmp , home , usr, var
But as victorv has sais its is best if no users are on the system , so they don't have opened files .
also it is best to backup just the root filesystem when doing a mksysb rather than the whole lot i.e. other filesystems etc.. to avoid this you can create a file in
/etc/ called exclude.rootvg ( more info do man mksysb)
so you back up / , tmp , home , usr, var
But as victorv has sais its is best if no users are on the system , so they don't have opened files .
- Thread starter
- #4
When I said "all files" I was only referring to the system files. I have only ever backed up rootvg during a mksysb.
If I understand the replies correctly, a mksysb "on the fly" will restore the operating system and every file in rootvg but may throw up a few errors.
As long as I can restore an working OS and rootvg back to where it was in the event of failure and get my users back online straight away, I will be happy. If there are small problems to sort out later then that's OK.
If I understand the replies correctly, a mksysb "on the fly" will restore the operating system and every file in rootvg but may throw up a few errors.
As long as I can restore an working OS and rootvg back to where it was in the event of failure and get my users back online straight away, I will be happy. If there are small problems to sort out later then that's OK.
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