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Forum Discussion
Unable to retrieve data from ReadyNAS Duo
Hi All,
I had a ReadyNAS duo which has, for want of better words, "blown up" on me!
I am trying to recover the data off the drive with little success despite vast amounts of reading on this forum, which has been very helpful.
Despite my efforts i seem unable to recover the data all though it appears I can access the system partition without issue.
Below is the output of fdisk -l on the drive in question:
I can mount /dev/sdb1 ok using: ~ $ sudo fuseext2 -o ro,allow_other /dev/sdb1 /mnt/foo/
Once this is mounted i can see the filesystem of the ReadyNAS but cant actually access any of my data:
applications, backup, media and private all come up as sym links to /c/<respective folder> but there is no data in the c folder.
Additionally, based on other posts, i have tried to do a vgscan, pvscan to try and change into volume group c however:
Would really appreciate if anyone could assist as I have years of photos on this device, please spare the have you got a backup!
Am i doing something wrong when I mount the filesystem? Should i be looking in one of the other partitions for my actual files?
Any help, anyone can offer will be greatly appreciated!
Thanks in advance :)
I had a ReadyNAS duo which has, for want of better words, "blown up" on me!
I am trying to recover the data off the drive with little success despite vast amounts of reading on this forum, which has been very helpful.
Despite my efforts i seem unable to recover the data all though it appears I can access the system partition without issue.
Below is the output of fdisk -l on the drive in question:
~ $ sudo fdisk -l /dev/sdb
Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xd80ce136
Device Boot Start End Blocks Id System
/dev/sdb1 2 4096001 2048000 83 Linux
/dev/sdb2 4096002 4608001 256000 82 Linux swap / Solaris
/dev/sdb3 4608002 1953092233 974242116 5 Extended
/dev/sdb5 4608003 1953092233 974242115+ 8e Linux LVM
I can mount /dev/sdb1 ok using: ~ $ sudo fuseext2 -o ro,allow_other /dev/sdb1 /mnt/foo/
Once this is mounted i can see the filesystem of the ReadyNAS but cant actually access any of my data:
$ ls /mnt/foo
applications c frontview lib mnt proc sbin USB
backup dev home lost+found opt ramfs sys usr
bin etc initrd media private root tmp var
applications, backup, media and private all come up as sym links to /c/<respective folder> but there is no data in the c folder.
Additionally, based on other posts, i have tried to do a vgscan, pvscan to try and change into volume group c however:
sudo vgscan
Reading all physical volumes. This may take a while...
No volume groups found
sudo pvscan
No matching physical volumes found
Would really appreciate if anyone could assist as I have years of photos on this device, please spare the have you got a backup!
Am i doing something wrong when I mount the filesystem? Should i be looking in one of the other partitions for my actual files?
Any help, anyone can offer will be greatly appreciated!
Thanks in advance :)
16 Replies
- Were you using X-RAID or Flex-RAID?
You've mounted the 2GB OS partition.
What's the output of the following?:
# df -h
# df -i - Hi mdgm, thanks for your reply!
I had two disk in the NAS and i believe i was using raid0, which i believe is X-RAID?
I have checked the other disk but there appears to be naff all on that one.
$ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda1 33G 4.6G 27G 15% /
none 4.0K 0 4.0K 0% /sys/fs/cgroup
udev 984M 4.0K 984M 1% /dev
tmpfs 200M 1.3M 199M 1% /run
none 5.0M 0 5.0M 0% /run/lock
none 998M 76K 998M 1% /run/shm
none 100M 32K 100M 1% /run/user
/dev/sdc1 466G 60G 407G 13% /media/bevan/430A-5764
/dev/sdb1 2.0G 364M 1.6G 19% /mnt/foo
df -i
Filesystem Inodes IUsed IFree IUse% Mounted on
/dev/sda1 2162688 186634 1976054 9% /
none 255391 2 255389 1% /sys/fs/cgroup
udev 251685 513 251172 1% /dev
tmpfs 255391 543 254848 1% /run
none 255391 2 255389 1% /run/lock
none 255391 4 255387 1% /run/shm
none 255391 15 255376 1% /run/user
/dev/sdc1 0 0 0 - /media/bevan/430A-5764
/dev/sdb1 128000 10210 117790 8% /mnt/foo
It appears that that partition is 2GB :? - No. RAID-0 is not X-RAID. RAID-0 is non-redundant RAID where if a single disk fails all data is lost.
Are both disks in your PC?
Did you use a single volume or multiple volumes? - No i only have one external docking station unfortuantely and i am using a laptop.
TBH i cant remeber the exact setup but im sure i selected the option where it copies to both disks it might have been raid-1 or raid-x.
Single or multiple volumes i have no idea....
# cat /mnt/foo/var/log/frontview/enclosure.log
$ cat /mnt/foo/var/log/frontview/enclosure.log
fan!!1!!status=ok::descr=1744RPM
ups!!1!!status=not_present::descr=
volume!!1!!status=ok::descr=Volume C: RAID Level X, Redundant. 280589 MB (29%) of 925 GB used
disk!!1!!status=ok::descr=Channel 1: SAMSUNG HD103UJ 931 GB, 34C/93F
disk!!2!!status=ok::descr=Channel 2: SAMSUNG HD103UJ 931 GB, 31C/87F
model!!0!!mode=home::descr=ReadyNAS Duo::arch=nsp- So you are using X-RAID.
It's not good that you can't find it using vgscan. That suggests a problem with the array.
Do you get any output from
# pvdisplay
# vgdisplay
# lvdisplay - Have entered all those commands:
pvdisplay returns nothing
$ sudo vgdisplay
No volume groups found
$ sudo lvdisplay
No volume groups found
One thing i do find odd is that when looking at one drive with gparted i have two partitions that are both 929.11GB on a 1TB drive. :?
/dev/sdb3 is extended and dev/sdb5 is ext2. Not sure if this has any bearing but does seem a little strange.
Thanks for all your help so far, really appreciated! - What is your dmesg output?
Sounds like you may need to consider paid data recovery options.
$ dmesg | tail
[ 5384.343292] sd 36:0:0:0: [sdb] Mode Sense: 28 00 00 00
[ 5384.348047] sd 36:0:0:0: [sdb] No Caching mode page found
[ 5384.348050] sd 36:0:0:0: [sdb] Assuming drive cache: write through
[ 5384.358571] sd 36:0:0:0: [sdb] No Caching mode page found
[ 5384.358574] sd 36:0:0:0: [sdb] Assuming drive cache: write through
[ 5384.375657] sdb: sdb1 sdb2 sdb3 < sdb5 >
[ 5384.413817] sd 36:0:0:0: [sdb] No Caching mode page found
[ 5384.413821] sd 36:0:0:0: [sdb] Assuming drive cache: write through
[ 5384.413823] sd 36:0:0:0: [sdb] Attached SCSI disk
[ 5385.089742] EXT3-fs (sdb1): error: bad blocksize 16384
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