OK since there is no RAID involved run some diagnostics on the HDD/s to see if they are working correctly. The Drive Maker has a testing Utility available for Download from their Web Site to do this and you should use the one from the Drive Maker that makes the affected HDD.
Of course if there is a problem reported with the drive that doesn't mean that the HDD itself is faulty but it is a good starting point so you can remove that HDD and test in another [b]Known Good[/b] system to see if you get the same results. If you do it's the HDD and if you don't it's the HDD controller that is at fault.
So depending on the system it can either be a Faulty HDD or the HDD controller which is generally part of the M'Board unless you have a Plug In Card to support more HDD's and then it will be the Plug In Card at fault.
Of course always test with a [b]Known Good[/b] Data Lead and check the power lead for possible problems. With some of the currently available Connectors the Power Pins can & do push out of the connector and Data Leads can become defective if they are constantly being plugged in and pulled out. It's also possible with some of the IBM servers to have a faulty Hot Swap SCSI Socket so this should be checked as well when you test the drive.
Col
