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netgear readynas 316no volume exists. Netgear recommends that you create volume before configuring
Hello ,
I am getting the error netgear readynas 316 no volume exists. Netgear recommends that you create volume before configuring other settings.
I have a readyNAS 316 with 6 disks each 3TB and on RAID 5. Disk 4 degraded and i have to look for a new disk in a period of 2 weeks. On replacement, I switched off the NAS, removed the degraded disk and inserted the new 3TB disk. After booting, the NAS was giving the above error. Suddently Disk 1 was showing missing. I rebooted the NAS but was still showing the above error.
How do you go about it in order not to lose data? Does it mean the new disk is faulty?
The device is still recognising 13.2 storage. 6 disks by 3tb should be 18TB.
Can someone help me kindly
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Storage industry is using decimal, not binary TB, 3,000,000,000,000 bytes (decimal) so 6 x 2.7 TB (binary), grand total of 16.2 TB before the RAID overhead, correctly shown for your ST3000 HDD. In case you might have very old real 3 TB disks - check the Web UI mouse over ... it will show it accordingly.
schumaku , this is well explained.
Dan-Wabwile wrote:
The device is still recognising 13.2 storage. 6 disks by 3tb should be 18TB.
The capacity rule for single redundancy XRAID is "sum the disks and subtract the largest" - in your case that is 15 TB (using 1000*1000*1000*1000 bytes per TB). The remaining 3 TB is used for parity blocks, which allows any single disk to be reconstructed from all of the others.
15 TB is the same as ~ 13.62 TiB (1024*1024*1024*1024 bytes). Which is what your screen shows.
As far as the missing disk 1 and 4 goes, it is difficult to tell what is happening from the screenshot. The best strategy now is to power down the NAS and test the disks in a Windows PC using seatools. Label the disks as you remove them from the NAS, so you can put them back in the correct slots. Don't power up the NAS until all disks are back in place.
I can also take a look at the log zip if you like. If you are interested in that, send me a private message (PM) that includes a download link for the log zip (saving the zip in dropbox, google drive, etc). Make sure the link permissions are set so that anyone with the link can download.
Dan-Wabwile wrote:
How do you go about it in order not to lose data? Does it mean the new disk is faulty?
FWIW, I always test new disks in a PC before putting them into the NAS. I do the full (long) non-destructive read test, and then follow that up with a full erase test. I have had some new disks that pass one of these tests, but fail the other.
As far as replacement goes, I hot swap the disks (removing the old one and inserting the new one with the NAS running).
Still, your data is more vulnerable to loss during a disk replacement than at other times. So I do recommend making sure your backup is up to date before manipulating disks.
It sounds likely that the stress of a re-sync caused drive 1 to fail during the sync of the new drive. If it did, then you only have 4 drives of a 6-drive RAID5, and the volume cannot be assembled. There are possible solutions (though most will result in some data loss), so follow the advice of StephenB to determine exactly where you stand so a forward plan can be devised.
If you do have a current backup, then the easiest thing to do is just replace all the bad drives (which may be just drive 1 at this point), restore the data, and mush on.
If you filled your NAS with drives prior to putting it in use, what you are experiencing is all too common because all the drives are the same age and subject to failure in a similar timeframe. That's why I always recommend users start with what they need now and expand later as needed. That spreads out their ages as well as not all being of the same lot (in the event there was a lot issue). The beauty of XRAID is that that's really easy. BTW, I didn't start giving that advice until I came really close to that happening to me. A second drive failed within two weeks of the first, but I was lucky enough that the sync was complete and I just had to replace the drive. At the time, I was backing up to multiple USB devices (the ones I retired in favor of the NAS), so some share backups were not up to date and I would have been very unhappy if I lost the volume. The experience also made me invest in a second NAS (an NV+), which became my primary and I relegated the older one (an Infrant NV) to backup duty.
StephenB Actually I have enslaved the new disk on the desktop but it was not able to be detected nor be read. I have connected externally on my laptop but still no detection. So i suspect the NAS could not rebuilt the data while on 4 disks. So my worry is if the data is lost. I shutdown the NAS since i never wanted any further damages. Am getting a new disk then share the feedback with you.
Dan-Wabwile wrote:
Actually I have enslaved the new disk on the desktop but it was not able to be detected nor be read.
FYI, Windows can't mount the disks due to the linux formatting, but the vendor tools (seatools in this case) can still detect them. Also, they should show up in the Windows Disk Manager.
So if you didn't check with those tools, it is worth another look.
If the new disk has failed out of the box, I suggest exchanging it for a Seagate Ironwolf instead of another surveillance-purposed drive.
Hello StephenB
I got a new disk, connected to 3.5 Disk reader and was able to read it on the laptop. The storage is 2.75. I have replaced the disk in slot 4 but still could not rebuilt.
Disk 1 still appears missing.
Attached are the screenshots and logs.
How do i go about to for this disk 4 to be active
You can't restore the volume (or sync disk 4) without disk 1. Your RAID redundancy only handles one failure, not two. I suggest you try testing disk 1 in a PC next.
Did the original disk 4 completely fail? If not, do you still have it (intact)?
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