NETGEAR is aware of a growing number of phone and online scams. To learn how to stay safe click here.
Forum Discussion
Solved
X-RAID (RAID 5) Recovery Problems - ReadyNAS NV+ (RND4210) #27270843
My ReadyNAS had 3x 2TB HDD's and was working fine. It was configured for X-RAID and my understanding is that with 3 hard drives it behaves as a RAID 5 configuration where any one of the three drives...
Disk 2 (your SeaGate disk) is the dedicated parity disk.
However it looks like this problem may be simpler than I thought.Your OS partition is 100% full (this is probably why it was still stuck on booting even after replacing the failed disk)
# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/hdc1 1.9G 2.0G 560k 100% /
# du -csh /var/log/frontview/error.log
1.4G /var/log/frontview/error.log
That log was last updated back in June and contains errors related to the http/s service. It's typically not a very important log so I just emptied it.
Yes, when I try booting with only drives 1 and 2 installed it still get stuck at "BOOTING..."
One weird thing, it seems to remember the old configuration (pre-breakage) - on the front of the NAS itself I get solid green LEDs on Drive 1 and Drive 2 and a blinking green LED on Drive 3, and in RAIDar it shows all 3 drives (drive 3 shown on RAIDar is the old one that died) and a UPS that is no longer hooked up. This behavior is the same whether I have 3 drives installed or when I just tested with only 2 drives installed.
A few other notes that might be helpful for a better diagnosis - I have tried several things hoping to remedy the problem already.
- Tried OS Reinstall (no change)
- Tried USB Boot (no change)
- One of tech support calls had me put it in Tech Support Mode (which gave current and proper readings in RAIDar)
- Removed all drives and put in a different single HD I had (essentially a factory reset using that new HD - everything worked PERFECTLY - except of course for my missing data which is on the other drives)
So as far as I can tell my ReadyNAS unit itself is just fine. If I had a proper backup, I'm pretty sure I could do a factory reset and everything would work again. But since I don't have a proper backup I'd really like to try to salvage the data.
I'm not familiar with RAID 4 - if that is what my unit is using, what are my options from here?
guy1074 wrote:
I'm not familiar with RAID 4 - if that is what my unit is using, what are my options from here?
RAID-4 has the same concept of RAID-5 (xor parity blocks), but the parity blocks are all placed on one disk instead of spread out over all of them. In the case of your NV+, the parity blocks are on an area of the disk that looks unformatted to standard linux tools.
Your options are
(a) pay a reputable data recovery service. Netgear offers one, Seagate does also. Western Digital doesn't (last I checked) but they do recommend some partners who do.
(b) attempt to recover the data yourself. There are some paid tools you could try - generally they are free downloads, so you can see what they might recover before you purchase.
If this is a science project/learning experience then you could go for (b). If the data is important, and you want to maximize your chance of success then go for (a).
Disk 2 (your SeaGate disk) is the dedicated parity disk.
However it looks like this problem may be simpler than I thought.Your OS partition is 100% full (this is probably why it was still stuck on booting even after replacing the failed disk)
# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/hdc1 1.9G 2.0G 560k 100% /
# du -csh /var/log/frontview/error.log
1.4G /var/log/frontview/error.log
That log was last updated back in June and contains errors related to the http/s service. It's typically not a very important log so I just emptied it.
NETGEAR Academy
Boost your skills with the Netgear Academy - Get trained, certified and stay ahead with the latest Netgear technology!
Join Us!
