NAS326 problem - part 2 - help is needed - Volume is down
![Janikovo](https://us.v-cdn.net/6029482/uploads/avatarstock/nW2K7KBVBE0HN.png)
Janikovo
Posts: 24
Freshman Member
![](https://www.zyxel.com/library/assets/zyxel-forum/freshman_member.png)
Hello all,
and especially @Mijzelf
You probably know my problem with one faulty disk on NAS326 (linear, jbod).
Look here: https://homeforum.zyxel.com/discussion/3827/nas326-problem/p1
Problem is how to "assemble" NAS volume (or array back) without losing data.
So, I managed with ddrescue copied 99.999% of that faulty disk to the news HDD same size.
Installed the new disk to NAS, but the situation is as follows:
![](https://us.v-cdn.net/6029482/uploads/editor/jr/vuyy0vvi4sa0.jpg)
![](https://us.v-cdn.net/6029482/uploads/editor/gd/nvuy6056yy9l.jpg)
![](https://us.v-cdn.net/6029482/uploads/editor/tu/27woqgq60lji.jpg)
![](https://us.v-cdn.net/6029482/uploads/editor/pp/6ipzld20bdnq.jpg)
![](https://us.v-cdn.net/6029482/uploads/editor/vp/pvahkw2xyg7u.jpg)
![](https://us.v-cdn.net/6029482/uploads/editor/uw/jg86nfzh5yvd.jpg)
![](https://us.v-cdn.net/6029482/uploads/editor/k8/ebybw59ehq5z.jpg)
![](https://us.v-cdn.net/6029482/uploads/editor/b0/ic6gs85rhimn.jpg)
![](https://us.v-cdn.net/6029482/uploads/editor/hu/wd8zowvfvgcz.jpg)
![](https://us.v-cdn.net/6029482/uploads/editor/1w/6q0i688naeyb.jpg)
What should I do now ?
Please an advice
and Thanks.
#NAS_June_2020
and especially @Mijzelf
You probably know my problem with one faulty disk on NAS326 (linear, jbod).
Look here: https://homeforum.zyxel.com/discussion/3827/nas326-problem/p1
Problem is how to "assemble" NAS volume (or array back) without losing data.
So, I managed with ddrescue copied 99.999% of that faulty disk to the news HDD same size.
Installed the new disk to NAS, but the situation is as follows:
![](https://us.v-cdn.net/6029482/uploads/editor/jr/vuyy0vvi4sa0.jpg)
![](https://us.v-cdn.net/6029482/uploads/editor/gd/nvuy6056yy9l.jpg)
![](https://us.v-cdn.net/6029482/uploads/editor/tu/27woqgq60lji.jpg)
![](https://us.v-cdn.net/6029482/uploads/editor/pp/6ipzld20bdnq.jpg)
![](https://us.v-cdn.net/6029482/uploads/editor/vp/pvahkw2xyg7u.jpg)
![](https://us.v-cdn.net/6029482/uploads/editor/uw/jg86nfzh5yvd.jpg)
![](https://us.v-cdn.net/6029482/uploads/editor/k8/ebybw59ehq5z.jpg)
![](https://us.v-cdn.net/6029482/uploads/editor/b0/ic6gs85rhimn.jpg)
![](https://us.v-cdn.net/6029482/uploads/editor/hu/wd8zowvfvgcz.jpg)
![](https://us.v-cdn.net/6029482/uploads/editor/1w/6q0i688naeyb.jpg)
What should I do now ?
Please an advice
and Thanks.
#NAS_June_2020
0
All Replies
-
The array is assembled, but it fails to mount. So try running fsck:e2fsck /dev/md20
-
OK,
i tried add -n to e2fsck
and it show this:~ # e2fsck -n /dev/md2e2fsck 1.42.12 (29-Aug-2014)Warning! /dev/md2 is in use.ext2fs_open2: Bad magic number in super-blocke2fsck: Superblock invalid, trying backup blocks...e2fsck: Bad magic number in super-block while trying to open /dev/md2The superblock could not be read or does not describe a valid ext2/ext3/ext4filesystem. If the device is valid and it really contains an ext2/ext3/ext4filesystem (and not swap or ufs or something else), then the superblockis corrupt, and you might try running e2fsck with an alternate superblock:e2fsck -b 8193 <device>ore2fsck -b 32768 <device>
btw:
mdadm --stop /dev/md2:~ # mdadm --stop /dev/md2mdadm: Cannot get exclusive access to /dev/md2:Perhaps a running process, mounted filesystem or active volume group?So, I cant stop md2
How could I assemble volume (array) without losing data ?0 -
So, I cant stop md2
You can't stop md2, because it's busy. md2 is not mounted, so there must be something else. I should have looked further, apart from md2 there is also a dm-1 in /proc/partitions, which is slightly smaller than md2. So inside your raid array there is a 'logical volume', and that logical volume is the one containing the file system.
So try
e2fsck /dev/dm-1
I am not sure if that dm-1 devicenode is inside /dev/. If /dev/dm-1 cannot be found, try
find /dev/ grep dm
to find the path to the devicenode.
0
Categories
- All Categories
- 414 Beta Program
- 2.2K Nebula
- 130 Nebula Ideas
- 88 Nebula Status and Incidents
- 5.4K Security
- 166 USG FLEX H Series
- 255 Security Ideas
- 1.4K Switch
- 71 Switch Ideas
- 999 Wireless
- 36 Wireless Ideas
- 6.2K Consumer Product
- 233 Service & License
- 370 News and Release
- 77 Security Advisories
- 24 Education Center
- 5 [Campaign] Zyxel Network Detective
- 2.9K FAQ
- 34 Documents
- 34 Nebula Monthly Express
- 80 About Community
- 69 Security Highlight