I have a PCI SCSI RAID controller and the drives go offline during heavy loads
August 5th, 2009
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The most common reason for drives being marked offline is cabling/termination issues. Make sure the cabling is of the highest quality (twisted pair or Teflon ribbon) that’s within SCSI specifications as to maximum bus length, impedance matching, and maximum allowed devices.
For best results, use a system level SCSI terminator (LVD/SE) on the end of the cable, instead of using the last drive for termination. Make sure the hard drives are set to provide SCSI Termination Power, if supported. Rarely is drive firmware an issue more often a SCSI controller BIOS or ASPI driver update.
Try the following troubleshooting steps:
- Check all…