January 9, 20242 yr Hello all. With increasing frequency, my array has been going down. Seemingly out of nowhere, all disks start returning read errors which causes all my dockers and VMs to stop working. Typically this is fixed by a reboot, or in some cases after a few reboots. The machine is a r720xd with RAID card flashed to IT mode, so all the array disks are connected via a backplane. Before I start replacing parts, would you folks be so kind as to review the diagnostics and see if there is anything else going on here? I've attached diagnostics from the past two occurrences. This used to occur maybe once a every few months, and now it's nearly every day. Thanks. marvin-diagnostics-20240108-1959.zip marvin-diagnostics-20240106-2330.zip
January 9, 20242 yr Community Expert No disks in those. Have you tried reseating the controller? How many disks do you have?
January 9, 20242 yr Community Expert OK, looks like you had 7 disks plus 2 parity and one cache before they all disappeared. Is that correct?
January 10, 20242 yr Author The disks don't show up in iDRAC, and they never have since I flashed the RAID card to IT mode. They do not show in the BIOS boot menu for the server, and never have. Perhaps I'm not looking in the right place. But they show up in Unraid, of course.
January 10, 20242 yr Community Expert Solution Disks are dropping offline, looks more like a power/connection issue.
January 19, 20242 yr Author Thanks all. I made a few changes that seem to have improved system stability. Recording them here for anyone else running a similar Dell server: State when I was experiencing drive dropouts: - No UPS - Two redundant power supplies installed, but wall power only supplied to one (I was simply storing the other redundant PSU inside the server) Note that with the above configuration, the server never powered down even when power was visibly (i.e. lights flickering) affected by things like hairdryers or starting another desktop PC on the same breaker. Current state that appears to be stable: - Purchased and installed UPS - Connected both redundant power supplies to UPS I have not had any drive droputs since making these changes. I will report back if the issue resurfaces. Again, thanks. Edited January 19, 20242 yr by artdepart
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