Hey All,
So I have a *really* strange issue here. I was recently given a Dell T620 server, and I'm having issues with getting it to play nice with some SATA drives I've dropped into it.
I should start off by saying they are not dell certified drives, they're cheap second hand refurbished 1TB 2.5" Toshiba drives I'm sticking in one big RAID5 array with a hot spare. Presently there are 5 drives in the array.
One of the drives comes up fine, but four of them are exhibiting strange behaviour. They work ... but .....
When showing in the RAID controller, they have a disk id of "--:--:08" and "--:--:09", etc, and are flashing orange on the status light. The disks can be added to arrays not a problem, there are no SMART errors and for all intents and purposes they work fine, there's just this annoying flashing yellow light on them. The drives work with no errors in other devices, just something about the Dell is off. The error the box is throwing is a PDR1001 error which, as best I can tell usually represents a SMART imminent failure error, however there is no such error on the actual drives themselves.
Here comes the interesting part. I had given up on finding a fix for this, and just, to let the orange lights flash, but, when I set up the iDRAC today, I found, that it may not be a problem with the RAID controller or the drives after all, but something that the SAS/SATA enclosure is doing strangely. When looking in the iDRAC web interface, the ports that contain the drives that are "faulting" are reporting as empty. The one drive of this type that isn't faulting is reporting as being there. I can remove and reinsert the drives as many times as I want, the enclosure still believes the drives are not inserted. If I juggle them around, the one drive that reports as there, reports in any slot that I insert it into. I'm assuming there must be something slightly different about this drive (other than the serial number) to make it not throw an error, but I'm damned if I can figure out what.
All drives are of the same make and model, all running the same firmware revision.
So, does anybody have any idea why my enclosure might think there are no drives present in the slot, when there actually are, despite the fact that they show up in the controller and can be added into a functioning array?