> The Restropect version is 6.1.138 using the “Retrospect 6.1 Driver Update”
- What version of the RDU? That information is written to the log each time Retrospect launches.
-Retrospect Driver Update, version 188.8.131.52
> *Thinking there might be a problem with the drive, I tried another Western Digital “My Book
> Premium Edition II” drive. The same problem occurred.
- Did you use the same power supply?
- What happens when you try with a different make of external drive?
-No, I used two totally different power supplies; the ones that came with the drives.
-I don't have an alternative at the moment.
> *I installed the WD Button Manager, since some people reported the drives sleeping and
> not properly waking up
You installed a third party kext onto an XServe running OS X Server?
-Yes, that is what Western Digital recommended: Western Digital Support
If you've got a simple FireWire external hard drive that requires a system level kernel extension for proper operation, I'd suggest that you've made a bad choice in hardware.
-I didn't get to choose the hardware.
Is there a slot free in the XServe for an eSATA card?
-Yes, I believe only slot 2 is in use by our Fiber Channel card.
> We are attempting to backup to a Western Digital “My Book Premium Edition II” 2 Terabyte Drive...
The 2 terabytes are achieved by striping two 1 TB drives into a RAID. Problem is, two drives have twice the likelihood of suffering a mechanical failure then one drive has. And if one drive fails, you loose all the contents stored on both drives. (compare that to a twin engine plane, which also has twice the likelihood of suffering an engine failure, except the plane is designed to allow for operation and safe landing with the remaining single engine)
-Yes, I totally understand and agree that this is not the ideal way to do backups; however, this is what I was presented with and I'm trying to make it work.
So you've got two issues; the first is that the backup scenario you're attempting does not provide the most fault tolerant data protection that it could/should. The second is that you've got a hardware problem of some sort, either the FW bus in the XServe, the cable you're using, or the make/model of the device you've selected to use.
-Both drives came with their own firewire 800/ firewire 400 / USB cables and power adapter.
If the problem is with these external drives, then I have the opportunity to propose a better solution.
Thank you very much for helping me narrow down the possible cause of this problem and your suggestions.