I wanted to test performance in a RAID10 with a "damaged drive". To simulate this situation I've set a single drive to "Offline" by using this command:
MegaCli -PDOffline -PhysDrv [45:12] -aAll
The drive went offline but directly with this command another drive switched to "failed". I checked the status of all drives before performing this command. All were marked as online.
Does setting a drive "offline" puts a lot of pressure on the hardware so the risk of damaging a disk increases heavily? Is this behaviour common?
I'm using MegaRAID SAS 9280-4i4e and SATA drives.