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ReadyNAS NV+ disc replacement failure using identical disk type
My ReadyNAS NV+ is equipped with 4 identical 2 TB drives. Seagate Model ST2000DM001. I am running XRAID. Was receiving notices of increasing bad sectors, in increasing numbers on Drive 4. Purchased an identical drive online. Attempted hot swap failed. Attempted cold boot failed. Log messages both times showed ... "The disk attached to channel 4 could not be used. The most common reasons are RAID resync in progress, faulty drives, and disks that are too small to be added to the array." Health Status shows drive dead. Reformatted the drive NTFS, tried both procedures again. Same result both times. Eventually re-inserted original drive 4. Syncing process took 5 days but finally succeeded, as both log entry and email indicated. Unfortunately, drive 4 failed permanently 2 days later, so the warnings were valid all along. Purchased a 3 TB Seagate drive online. Model ST3000DM008. Tried both procedures again (hot, cold) but received same log message and status (Dead). Verified 3 TB storage capacity in Windows, reformatted NTFS, tried both procedures again. I have left the new drive in the Drive 4 slot, with the light blinking. I am considering data migration options but would like to get redundancy back on this unit. HELP!!!
GeorgeYYZ wrote:
The Ultra 4 is currently running under X-RAID2. I assume that this is equivalent to X-RAID...
Yes. On the Sparc NAS (NV+, etc) they called it X-RAID, then with Ultra/Pro they rebranded it to X-RAID2. With OS-6 they went back to XRAID.
In all cases it is "expandible raid", the details on expansion vary, depending on which platform you have.
GeorgeYYZ wrote:
but I will revise my upgrade plans to 4x4TB, since that is a suitable match for my Synology DS918+ .
It'd be sensible to match their capacities. You can then use one to back up the other (I use my older-but still working ReadyNAS as backups).
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GeorgeYYZ wrote:
Purchased a 3 TB Seagate drive online. Model ST3000DM008.
If your NAS runs 4.1.x firmware, then the max drive size is 2 TB. A 3 TB drive will appear much smaller and can't be added to the array.
Overall, Seagate DM drives don't have a good track record in RAID arrays. I'd suggest either a 2 TB WDC Red or a 2 TB Seagate Ironwolf. Both are NAS-purposed drives. I use a WD20EFRX in my own Duo v1.
Thanks for this information. My NAS is running 4.1.16 firmware, as you suspected. Are there later firmware versions for the NV+ that allow greater capacity than 2 TB per drive? That would also be welcome news to me.
I should say that I've had a good experience with these 4 Seagate DM drives until very recently, with over 5 years of use in 4 different locations. Nevertheless, I have just gambled on your advice and ordered a WD20EFRX online. I will report back with results after it has been installed.
In te meantime, do you have any advice on "drive preparation" when it arrives, or should I just put it in "hot" and pray for sync to begin? I have been unable to locate any advice on drive prep on the Netgear site, or in the Community pages. Thanks again for your help!
GeorgeYYZ wrote:
Are there later firmware versions for the NV+ that allow greater capacity than 2 TB per drive? That would also be welcome news to me.
Unfortunately not. The hardware design goes back to ~2007 or so, and simply wasn't designed to handle >2 TB drives .
GeorgeYYZ wrote:
I should say that I've had a good experience with these 4 Seagate DM drives until very recently, with over 5 years of use in 4 different locations.
The 3 TB version has a rather poor reputation ( https://www.backblaze.com/blog/3tb-hard-drive-failure/ ) and I've quite a few issues with that particular model posted here. In general, I recommend either NAS-purposed or enterprise-class drives for RAID. Years ago, desktop-class drives made sense, but NAS purposed drives are similar in price, and have the right features for RAID.
GeorgeYYZ wrote:
In te meantime, do you have any advice on "drive preparation" when it arrives, or should I just put it in "hot" and pray for sync to begin? I have been unable to locate any advice on drive prep on the Netgear site, or in the Community pages. Thanks again for your help!
The disk is formatted by the NAS when you insert it, so no prep is needed. You should probably test it with Western Digital's lifeguard utility in a PC before you use it though. For Seagates, you'd use Seatools.
I recommend hot-insertion of the new drive (with the NAS running).
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