Does anybody know how to extend a swap volume for mirroring? The commands I use fail for some reason but I can't understand why this is,as PE seems fine.
SMAR6:root> swapinfo -t Kb Kb Kb PCT START/ Kb TYPE AVAIL USED FREE USED LIMIT RESERVE PRI NAME dev 1572864 0 1572864 0% 0 - 1 /dev/vg00/lvol2 dev 8912896 0 8912896 0% 0 - 1 /dev/vg00/lvol9 reserve - 3012892 -3012892 total 10485760 3012892 7472868 29% - 0 -
SMAR6:root> lvextend -m 1 /dev/vg00/lvol9 lvextend: Not enough free physical extents available. Logical volume "/dev/vg00/lvol9" could not be extended. Failure possibly caused by strict allocation policy Failure possibly caused by strict allocation policy
SMAR6:root> lvdisplay -v /dev/vg00/lvol9 | more --- Logical volumes --- LV Name /dev/vg00/lvol9 VG Name /dev/vg00 LV Permission read/write LV Status available/syncd Mirror copies 0 Consistency Recovery MWC Schedule parallel LV Size (Mbytes) 8704 Current LE 2176 Allocated PE 2176 Stripes 0 Stripe Size (Kbytes) 0 Bad block off Allocation strict/contiguous IO Timeout (Seconds) default
--- Distribution of logical volume --- PV Name LE on PV PE on PV /dev/dsk/c2t6d0 2176 2176
--- Logical extents --- LE PV1 PE1 Status 1 00000 /dev/dsk/c2t6d0 00050 current 00001 /dev/dsk/c2t6d0 00051 current 00002 /dev/dsk/c2t6d0 00052 current 00003 /dev/dsk/c2t6d0 00053 current 00004 /dev/dsk/c2t6d0 00054 current
Hi Gerard, The above is not quite clear ... Can you post the output of "vgdisplay -v vg00" ? The way I understand the above, you're trying to mirror to the same disk ?
Regards, Tom Geudens
A life ? Cool ! Where can I download one of those from ?
Swap *must* have contiguous strict extents, you can't just allocate anything to it. You can only extend an existing swap volume if there is sufficient logical extents available immediately after the last used extent of the volume. The best way is to either create a new volume (not a bad idea for spreading the load) or create an ignite tape and extending it from booting from tape and making the changes that way.
You have less than 2176 "contigous" PE on your mirror disk,
Assuming you have two boot disks and all your Lvols are mirrored except for the additional swap then you need to rearrange the mirror disk a little. To make the available extents contiguous. (i.e. break mirror and remirror).
Check using pvdisplay -v on the mirror disk to see what is where on the mirror disk.
You need to specify the disk to which you are mirroring swap. # lvextend -m 1 /dev/vg00/lvol9 /dev/dsk/cxtydz Make sure disk /dev/dsk/cxtydz is in vg00 has continuous 2176 PE.
1.- Reduce alls lv on c1t6d0 for i in 1 2 3 4 5 6 7 8 do lvreduce -m 0 /dev/vg00/lvol"$i" /dev/dsk/c1t6d0 done for i in 1 2 3 4 5 6 7 8 9 do lvextend -m 1 /dev/vg00/lvol"$i" done
It seems like vg00/lovl9 is 2176 PEs on c2t6d0. c1t6d0 has 2519 PEs available, more than enough. I can't imagine why it won't fit, even given the strict/contiguous. Normally, space is allocated from the beginning of the disk, so that 2519 should be contiguous at the end of the disk... The only way it wouldn't be contiguous is if someone created two mirror LVs and then remove the first one.
Get a pvdisplay -v /dev/dsk/c1t6d0 and see if you can figure out what is where.
What are the commands i need to run to resolve this so the mirroring command can then work and what would cause such a gap and is this the reason with the mirror command will not work?
you can do that anytime you want, just need to know that you are removing disk mirrors.
So in case your remaining boot disk breaks while you are doing this, i.e. *before* you have setup the mirrors again and they are sync'd, you'll be in trouble!
lvextending a mirror and syncing 3-4 GB will take a few minutes... don't get nervous.
If you want to be on the safe side and have a tape drive attached to the system it would be a good idea to create an Ignite image before you break those mirrors.
