asked on Change defect drive in RAID 5. Hotswap "live" or shut down - swap- turn on?
Hi.
Have a HP ML 350G6 with a P410i Raid controller and 3 x 146 GB hotswap SAS drives.
One is defect.
Have swap theese drives many times (have many customers with this server type)
Some times hot-swapped while server is running and checked in Array config util that all is good.
And other times, I have shut the server down and swapped.
One way better\ safer than the other?
Thanx
Have a HP ML 350G6 with a P410i Raid controller and 3 x 146 GB hotswap SAS drives.
One is defect.
Have swap theese drives many times (have many customers with this server type)
Some times hot-swapped while server is running and checked in Array config util that all is good.
And other times, I have shut the server down and swapped.
One way better\ safer than the other?
Thanx
SBSServer HardwareStorage
Last Comment
Andrew Davis
I never shut down a server to change a hotswap drive. for me is the safer way. Its a feeling. But there`s no difference between this two alternative.
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ASKER
Thank you all
given that everything is good, either method is good. But my personal preference is to always do hot swap where i can as it is better for the end users. Having said that i ALLWAYS ensure that i have a current up to date and verified backup.
Reason
during a rebuild the drives must work hard to rebuild the data, so it stands to reason that if you have a second drive about to fail this is going to stress test it, and should it fail while the first is rebuilding then you now have a dead array (depending on the type of array, but assume raid 5 as mentioned in header). My backups are incremental so they will not wqork the drive nearly as hard as a rebuild, and then i have piece of mind. also remember that if you are doing this during working hours then changes since the backup will be lost, and regardless of that the rebuild will have a performance hit on the array so i allways leave it till the quietest time to put the new drive in and let the rebuild do it thing.
cheers
Andrew
Reason
during a rebuild the drives must work hard to rebuild the data, so it stands to reason that if you have a second drive about to fail this is going to stress test it, and should it fail while the first is rebuilding then you now have a dead array (depending on the type of array, but assume raid 5 as mentioned in header). My backups are incremental so they will not wqork the drive nearly as hard as a rebuild, and then i have piece of mind. also remember that if you are doing this during working hours then changes since the backup will be lost, and regardless of that the rebuild will have a performance hit on the array so i allways leave it till the quietest time to put the new drive in and let the rebuild do it thing.
cheers
Andrew