Found the error message "Vol C: is dead" on the front LED screen of my NAS this morning. It's a ReadyNAS NV+ v2 with 3x WD RED 4TB disks, can't remember if it's FlexRAID or XRAID2, all space as one volume, firmware 5.3.13 (as of a couple of months ago), unable to open shares/mapped drives, unable to browse admin web page, RAIDAR finds it on the network and says it's 'Healthy' and ticks on the three disks.
I've not restarted the unit yet.
Any pointers as to what to do next please?
Regards,
Kris.
Model: ReadyNAS RND4000v2|ReadyNAS NV+ v2 Chassis only
It does sound like a disk failure (or maybe two drives failed).
So I suggest testing the drives in a Windows PC using vendor tools (seatools for seagate, lifeguard for western digital). Label them by slot as you remove them (just in case the array isn't really dead).
Note that if the PC doesn't have accessible SATA ports, you can use a USB dock or adapter. Make sure the adapter handles 3.5" disks, some are 2.5" only.
So I restarted the NAS tonight and voila, back up and running. Any particular log files to check? I found this in the user.log file that may give a hint to a faulty disk but is this conclusive? Looks like it crashed a few days after the disk errors, even though it started and shutdown okay a couple of time.
Dec 9 09:01:47 ReadyNas RAIDiator: System is up. Dec 9 13:32:37 ReadyNas RAIDiator: Detected increasing reallocated sector count on disk 1 [-1, 0] Dec 9 13:32:37 ReadyNas RAIDiator: Reallocation event count: [-1, 0] Dec 9 13:32:37 ReadyNas RAIDiator: Detected increasing spin retry count on disk 1 [-1, 0] Dec 9 13:32:37 ReadyNas RAIDiator: Detected increasing pending sector count on disk 1 [-1, 0] Dec 9 13:32:37 ReadyNas RAIDiator: Detected increasing uncorrectable errors on disk 1 [-1, 0] Dec 9 13:32:37 ReadyNas RAIDiator: Current (temp, start_stop_cnt, power_on_hrs, power_cycle_cnt, load_cycle_cnt) = (-1, -1, -1, -1, -1) Dec 9 13:32:37 ReadyNas RAIDiator: Detected increasing reallocated sector count on disk 1 [0, -1] Dec 9 13:32:37 ReadyNas RAIDiator: Reallocation event count: [0, -1] Dec 9 13:32:37 ReadyNas RAIDiator: Detected increasing spin retry count on disk 1 [0, -1] Dec 9 13:32:37 ReadyNas RAIDiator: Detected increasing pending sector count on disk 1 [0, -1] Dec 9 13:32:37 ReadyNas RAIDiator: Detected increasing uncorrectable errors on disk 1 [0, -1] Dec 9 13:32:37 ReadyNas RAIDiator: Current (temp, start_stop_cnt, power_on_hrs, power_cycle_cnt, load_cycle_cnt) = (38, 5170, 10366, 1208, 4270) Dec 9 13:36:28 ReadyNas RAIDiator: Detected increasing reallocated sector count on disk 1 [0, -1] Dec 9 13:36:28 ReadyNas RAIDiator: Reallocation event count: [0, -1] Dec 9 13:36:28 ReadyNas RAIDiator: Detected increasing spin retry count on disk 1 [0, -1] Dec 9 13:36:28 ReadyNas RAIDiator: Detected increasing pending sector count on disk 1 [0, -1] Dec 9 13:36:28 ReadyNas RAIDiator: Detected increasing uncorrectable errors on disk 1 [0, -1] Dec 9 13:36:28 ReadyNas RAIDiator: Current (temp, start_stop_cnt, power_on_hrs, power_cycle_cnt, load_cycle_cnt) = (38, 5170, 10366, 1208, 4270) Dec 9 23:00:42 ReadyNas RAIDiator: System power-on scheduled for 12/10/2017 09:00 Dec 10 09:01:51 ReadyNas RAIDiator: System is up. Dec 10 23:00:18 ReadyNas RAIDiator: System power-on scheduled for 12/11/2017 18:00 Dec 11 18:01:49 ReadyNas RAIDiator: System is up. Dec 11 23:00:18 ReadyNas RAIDiator: System power-on scheduled for 12/12/2017 18:00 Dec 12 18:01:50 ReadyNas RAIDiator: System is up. Dec 15 17:33:43 ReadyNas RAIDiator: System is up.
Is it still advisable to check the disks on a PC with the WD tool?
I don't think the -1 to 0 count increases matter - I believe that sometimes the NAS will intialize counters to -1, and then of course the real SMART stats will look like an increase.
I think you should download the log zip file, and perhaps ask @mdgm-ntgr if he is willing to review it for you.
I wouldn't run disk diags now though. If your backup is out-of-date, I'd recommend taking care of that.
