October 23, 20169 yr I came across an issue while upgrading my server. I had a cache pool with 2 1TB drives. While transferring my drives to the new case, I was short 1 sata power cable, so I figured I'd just leave one of the cache drives disconnected. I figured that my cache drive would be fine with just one drive, but it would not mount (it was drive 2 out of 2) I have since just converted it to a single drive and changed the filesystem to xfs. Did I miss something when trying to run the cache pool with 1 drive missing?? I would like to set it up as a pool again once I get my cable, but this should actually work with a drive failure..
October 23, 20169 yr Community Expert Did you ever set up the cache pool with 2 drives connected? If not then I suspect that is your problem as the cache could never be initialised with a missing drive. Note that if you want to later go back to 2 drives in the cache this will mandate using the BTRFS format so you might want to use this even with a single drive so you can simply add the second drive later.
October 23, 20169 yr Author Did you ever set up the cache pool with 2 drives connected? If not then I suspect that is your problem as the cache could never be initialised with a missing drive. Note that if you want to later go back to 2 drives in the cache this will mandate using the BTRFS format so you might want to use this even with a single drive so you can simply add the second drive later. Yes, it was originally installed with 2 drives.. I only moved everything to a new case and couldnt connect one of the cache drives.. I figured it would work with one of the cache drives disconnected, but it did not for some reason.. It should just work, or would I have do something to work with one missing drive?
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