March 18, 201610 yr I just expanded my system from 12TB to 18TB a few weeks ago by adding another SATA controller and two 3TB drives. This morning at 4:40am unRAID reports that it lost contact with those new drives. Syslog reports it keeps trying to hard reset the connection, but getting nowhere. I was a little odd from the main web GUI how it still showed the drives as green?!? I rebooted the system to see if it would clear the error. Now it comes up and complains that it can't reach those two new drives. Even tried powering down, waiting a minute and firing it up again. Still, no joy. Pretty sure that controller is just dead in the water (IOCrest SI-PEX40064). I guess I will head out to Fry's this evening to see if they have something so that I can get this back online quick. I'm hoping that once I resolve the controller issue the drives will be back and things will be happy again. Will definitely run a parity scan once that is stable. I took a snapshot of the screen with the devices are their locations. Anything else that I should be on the lookout for when bringing this back online?
March 18, 201610 yr Community Expert If neither of the two disks redballed, replacing the controller should bring back the array online, then as you mentioned, you should run a parity check.
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