I've been having random issues with a particular drive in my server. Disk5 will work perfectly fine one day, then after powering down the server for some time and powering it back up, it'll boot up with the drive in an error state. No read errors or anything. The first time it happened I powered down the array, removed the disk, started the array back up and then powered down and reconnected the drive. Powered back up, assigned the disk to Disk5 and rebuilt the data onto the drive. No issues while the server was up for about a week. I powered down, as part of routine maintenance, and here we are again after booting it back up. I've attached a copy of the syslog.
I see instances of "Synchronize Cache" failing on sdb, then sdc, then sdd. Could this be an instance where the power supply is going bad? It's an older 500w Corsair CX500.
hurtadoserver-syslog-20200722-2040.zip