We look after a Fujitsu RX300 S4 server that has 6 x 500GB SATA drives in a RAID-6 array, running from an LSI MegaRAID card (built into the motherboard).
A couple of weeks ago, one hard drive flagged itself as being faulty (orange light on the drive bay, MegaRAIDcli software shows a firmware status of "Failed"). We ordered and replaced the drive, but after the rebuild started, a different drive flagged itself as faulty.
This has happened 3 times now - twice it flagged up different drives that had a fault, and once it has flagged up a drive that we have already replaced.
At the moment, two drives are showing faults - we don't know if the drives are actually failing, or whether the backplane or RAID card is at fault.
Has anyone experienced this before? Any tips on what to do next? We have a call into Fujitsu, but wondered if anyone out there had any pointers....