replacing multiple disks(ssa-raid - data on them) with new disks

[perpetua1]

can someone pls let me know what the safest procedure to follow

thanks much

 

[Chapter11]

It depends on what RAID type, and how many disks are involved.

If you are using a RAID5 and have lost more disks than number_of_hotspares+1, then you've already lost data.

The general rule I use is one at a time: swap it out, let the RAID or LVM mirroring catch up that drive, do the next one.

 

[Guest_imported]

We have raid 5 configuration(1 parity, 1hotspare) .

we have not lost data yet
What we are trying to accomplish:

we have 6-36G drives as well.
We want to swap our 6-18G drives with 6-72G drives. I'm looking for instructions on this. I'm not an AIX expert!
I'm not going to touch the 6-36G on the ssa-tower,just the 6-18G.

Remove them and replace them with 6-72G. hoping to create more space for our tsm application and its database.

Thanks for your tme

 

[AIXSPadmin]

If you can install the new drives into the tower along with the others, then you could migrate the data from the smaller disks to the new disks using `migratepv`, otherwise, if you have to remove the smaller disks before you can install the larger disks, and the data is not mirrored onto a disk in the tower, then a restore of the data would be necessary.