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Forum Discussion
ReadyNAS Ultra 4 dead
Hi, my ReadyNAS Ultra 4 which i use as a backup for my primary NAS was showing increasing SMART errors on disk 4 since some weeks... As i was about to leave for vacation, it was "only" a backup s...
Hello Max_1968,
If you haven't removed the disks yet, please download RAIDar 6.0 and install. This will give you an option to download the logs.
Regards,
Thanks both,
JennC - I have downloaded the logs before i posted here, basically SMART logs for all disks except #4 were fine, and my volume was dead due to double disk failure. I didnt find anything about what happened to #2, but didnt look in detail
StephenB - I followed your proposal, shut down the NAS, took out all disks, numbered them and run them through Seatools. Results as follows:
- Disk #1 - SMART Test - PASS
- Disk #1 - Short Test - PASS
- Disk #2 - Did neither show up in BIOS nor (obviously) in Seatools
- Disk #3 - SMART Test - PASS
- Disk #3 - Short Test - PASS
- Disk #4 - SMART Test - PASS (this surprised me as the Ultra reported it as failed due too to many SMART errors)
- Disk #4 - Long Test - FAIL right at the start
I then did a "full repair" with Seatools on disk #4, followed by another long test on it - This time result was PASS
So it seems now I have the following situation:
- Disk #1 OK
- Disk #2 FAIL
- DIsk #3 OK
- Disk #4 seems OK from a PC perspective, but might either fail right away in the ReadyNAS or again after a short period of time, not tried yet in NAS after repair
(BTW, these are Seagate ST3000DM001 drives about 2.5 years old - I never liked them, but I got the Ultra with them at a very reasonable price and thought for a backup system they are OK...)
My plan now is to clone disk #4 on the PC to the one replacement disk i already have (same type), hopefully get the Ultra and the volume up again, and then replace all disks one by one with 4 TB WD red drives starting with disk #2 to regain redundancy asap. I'd also like to figure out what happened to disk #2, but that has no importance now...
Does that sound like a good plan, any other recommendations ?
Thx,
Max
Max_1968 wrote:
I'd also like to figure out what happened to disk #2, but that has no importance now...
About 35% of all disks fail with no warning (no SMART alerts, etc).
Max_1968 wrote:
My plan now is to clone disk #4 on the PC to the one replacement disk i already have (same type), hopefully get the Ultra and the volume up again, and then replace all disks one by one with 4 TB WD red drives starting with disk #2 to regain redundancy asap.
Sounds right. I agree that cloning drive 4 makes sense, the "repair" facilities in the diags reallocate the bad sectors, but really don't repair anything. If the clone doesn't work you might need a recovery contract (or maybe per-incident support) with Netgear.
If it does work, then back up what you can before you add the WD Red. Rebuilding the array will stress the remaining drives.
Hello Max_1968,
This appears it needs data recovery. Disk cloning is part of it but it does not end there as you will have to rebuild the RAID with the still working disks and cloned disk. It is best you contact support center. Data recovery contract is needed for this concern.
Regards,
JennC: seems you are right, even with the cloned disk it still shows "dead" - I've opened a ticket through the link you sent me last Thursday, but have neither received a confirmation email nor a response. At the end of the ticketing process i was shown my ticket number and some phone numbers to call, am i supposed to contact them by phone and there is no support by mail ? As it seems you are working for Netgear - This NAS is a backup of a remote system and thus has less importance for me, i still do have the data on the main NAS. After looking at the logs and command line tools it seems i "just" need to add the cloned disk to the system using mdadm tools, after this it should be able to rebuild - Can someone please let me know the costs for this by PM ?
Hello Max_1968,
Try contacting NETGEAR support via phone.
To give you an idea, please see ReadyNAS Data Recovery Diagnostics - Scope of Service article.
Regards,
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