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Forum Discussion
BMuuN
Jan 27, 2021Aspirant
Remove inactive volumes to use the disk. Disk #1,2,3,4.
Wondering if someone can help... I can't access any of the 4 hard drives in my ReadyNAS 104. As a result all network shares are inaccessible. I'm running firmware v6.10.4 and the admin web inte...
StephenB
Jan 27, 2021Guru - Experienced User
BMuuN wrote:
This post suggests performing a factory default. Can anyone clarify if this will format the drives?
Yes, it will.
BMuuN wrote:
there are 4 x 4TB Western Digital drives in the NAS and as you can see from the above screenshot there's 10.90TB of data used, so it's over 80% consumption.
The information in your screenshot tells you nothing about free space.
- The free space indication is meaningless when the volume is not mounted.
- The 10.9 TiB indication is the total volume size, not the amount of space used. The NAS reports space in TiB (1024*1024*1024*1024 bytes) - even though it uses a TB label. 10.9 TiB is the same as 12 TB - which is the size of a 4x4TB RAID-5 volume.
BMuuN wrote:
You are trying to repair the wrong volume. md0 is the OS partition, and md1 is the swap partition. Neither uses btrfs. Your data volume should be md127, so maybe try that.
But you are risking making things worse. Another option is to use Netgear paid support, which would greatly reduce the chance of data loss.
BMuuN
Jan 28, 2021Aspirant
Thanks for getting back to me StephenB
A factory reset is out of the question as I'd like to recover as much of the data as possible.
StephenB wrote:
You are trying to repair the wrong volume. md0 is the OS partition, and md1 is the swap partition. Neither uses btrfs. Your data volume should be md127, so maybe try that.
But you are risking making things worse. Another option is to use Netgear paid support, which would greatly reduce the chance of data loss.
When I run `ls -la /dev` I don't see `md127`. Is this because the drive is not mounted?
By the sounds of it running `btrfs check --repair /dev/md127` will do more harm than good? Is my only option here Netgear support?
- StephenBJan 28, 2021Guru - Experienced User
BMuuN wrote:
When I run `ls -la /dev` I don't see `md127`. Is this because the drive is not mounted?
Likely yes. You might need to do a btrfs device scan before you try the repair.
BMuuN wrote:
By the sounds of it running `btrfs check --repair /dev/md127` will do more harm than good? Is my only option here Netgear support?
Your data is definitely at risk, and if you don't know what you are doing (which honestly is the case) you can certainly do more damage.
You could use paid Netgear support. There are other recovery services out there (I can't recommend any, since I've never used them).
If you can connect all the disks to a Windows PC, you could also use RAID recovery software. ReclaiMe is one package that folks here have used with success. If you use something else, you need to make sure that it support btrfs.
- mdgmJan 29, 2021Virtuoso
# for i in /dev/sd[a-z]3; do echo $i; mdadm -E $i | egrep "Creat|Update|State|Raid"; done; # mdadm --examine /dev/sd[a-z]3 | egrep -i 'sd|event|uuid|recovery|super|role|update'
If you want to check the state of the RAID running one of the above commands should indicate the state of the data volume RAID for each disk. It sounds like you probably have at least three different update times or multiple disks with each of at least 2 update times.
- BMuuNJan 29, 2021Aspirant
Appreciate you all taking the time to get back to me.
I don't want to risk loosing any of the data so I'm going to attach all 4 drives to my main PC and run a recovery software as suggested by StephenB. If the data can be recovered I'll backup the data to a new NAS which I'll order over the weekend.
mdgm I've ran your scripts and as you correctly mentioned the "Update Time" is different on 2 of the disks. It also appears that some disks think the array state is missing a disk:
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