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тАО10-13-2000 05:53 AM
тАО10-13-2000 05:53 AM
VG00 has 4 8GB drives
c1t3d0
c1t4d0
c1t5d0
c1t6d0
/usr filesystem is allocated in 2 groups of logical extents.
83 LE's on c1t6d0
67 LE's on c1t5d0
These have mirror copies allocated as follows:
83 LE's on c1t5d0
67 LE's on c1t4d0
Supposing I lose c1t5d0 which contains the 2nd extent of the primary copy and the mirror of the 1st extent. Would I be in danger of losing the /usr filesystem ?
Is it possible to have stale extents on primary and mirror copies and not lose data.
Solved! Go to Solution.
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тАО10-13-2000 05:59 AM
тАО10-13-2000 05:59 AM
SolutionI've seen this sort of thing before and I personally always change it.
I believe that if you lost c1t5d0, you would still be ok, you can have stale extents in both primary and mirror.
What I would do though is as follows:-
lvreduce -m 0 dev/vg00/lvol? /dev/dsk/c1t5d0
This will result in an unmirrored volume on c1t6d0 and c1t4d0.
Then lvextend -m 1 ....
to reinstate the mirror copy.
Regards,
John
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тАО10-13-2000 06:05 AM
тАО10-13-2000 06:05 AM
Re: LVM mirroring question
You forget c1t4d0. And with that your covered. But I prefer to put set up my HD mirrors and 'all mirror' I find it too dicey this way.
At least for me, this kind of situation becomes too confusing and also because setups like leave open a real easy way to make a mistake.
Regards,
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тАО10-13-2000 06:07 AM
тАО10-13-2000 06:07 AM
Re: LVM mirroring question
I agree with John & Rita. You're covered, but it is messy.
...JRF...
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тАО10-13-2000 06:39 AM
тАО10-13-2000 06:39 AM
Re: LVM mirroring question
What fast response! Thanks to all.
Dave