Zyxel 325v2 migration issue - raid 1 array down

Marvell Kirkwood based
DLe
Posts: 10
Joined: Fri Dec 29, 2017 3:02 pm

Re: Zyxel 325v2 migration issue - raid 1 array down

Post by DLe » Thu Feb 01, 2018 9:15 pm

Hello,

this seems very, VERY promising!

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~ # losetup /dev/loop3 -o 1048576 /dev/sda2
~ # mkdir -p /tmp/mountpoint
~ # mount -o ro /dev/loop3 /tmp/mountpoint
~ # cd ..
/ # cd /tmp/mountpoint
/tmp/mountpoint # ls -d */
Backup/            Foto-Video/        lost+found/        video/
BackupOld/         Hudba-Videoklipy/  music/
Data/              Ostatní/          photo/
Filmy/             admin/             public/
:D :D :D

But now how to move data from 2TB disc into first bay to 4TB disc into second bay? (I'm still Linux-almost-virgin)

My idea was to mount 4TB partition and copy directories from one mountpoint to second one from Putty through copy command ... but it didn't work:

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/tmp/mountpoint # fdisk -l

Disk /dev/sda: 2000.3 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x755def46

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1               1          64      514048+   8  AIX
/dev/sda2              65      243201  1952997952+  20  Unknown

WARNING: GPT (GUID Partition Table) detected on '/dev/sdb'! The util fdisk doesn't support GPT. Use GNU Parted.


Disk /dev/sdb: 4000.7 GB, 4000787030016 bytes
255 heads, 63 sectors/track, 486401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x00000000

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               1      267350  2147483647+  ee  GPT

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/tmp/mountpoint # mkdir /tmp/mountpoint4tb

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/tmp/mountpoint # mount -t ext3 -o ro /dev/sdb1 /tmp/mountpoint4tb
mount: /dev/sdb1 already mounted or /tmp/mountpoint4tb busy
/tmp/mountpoint # mount -t ext3 -o ro /dev/sdb2 /tmp/mountpoint4tb
mount: /dev/sdb2 already mounted or /tmp/mountpoint4tb busy
...already mounted or busy... does it mean, that 4TB disc's partitions are already mounted by system because 4TB disc is working and show healthy status? If yes, where are they mounted to? And how to move accessed data from 2TB disc to 4TB disc most effectively (is my idea correct way, or is there better way to accomplish this)?

This seems to be the one last step to get my data back into accessible form... Thanks a lot for your patience with me so far!

DLe
Posts: 10
Joined: Fri Dec 29, 2017 3:02 pm

Re: Zyxel 325v2 migration issue - raid 1 array down

Post by DLe » Thu Feb 01, 2018 10:01 pm

... after some "research" in another thread at this forum I came across info, that working disc's partitions are mounted into folder i-data/somestrangenumbers, so:

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/tmp/mountpoint # cd /i-data
/i-data # ls -la
drwxrwxrwx    4 root     root             0 Jan 26  2015 .
drwxr-xr-x   19 root     root             0 Jan  1  1970 ..
lrwxrwxrwx    1 root     root            19 Jan 29 03:10 .system -> /i-data/md0/         .system
lrwxrwxrwx    1 root     root            19 Jan 29 03:10 .zyxel -> /i-data/md0/.         system
drwxrwxrwx   10 root     root          4096 Jan 26  2015 a7c33296
drwxrwxrwx    2 root     root             0 Jan 29 03:10 fe0b8f56
lrwxrwxrwx    1 root     root            25 Jan 29 03:10 md0 -> /etc/zyxel/stora         ge/sysvol

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/i-data # df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/mtdblock6           48896     44376      4520  91% /zyxel/mnt/nand
/dev/sda1               497829    490380      7449  99% /zyxel/mnt/sysdisk
/dev/loop0              138829    122778     16051  88% /ram_bin
/dev/loop0              138829    122778     16051  88% /usr
/dev/loop0              138829    122778     16051  88% /lib/security
/dev/loop0              138829    122778     16051  88% /lib/modules
/dev/ram0                 5120         4      5116   0% /tmp/tmpfs
/dev/ram0                 5120         4      5116   0% /usr/local/etc
/dev/ram0                 5120         4      5116   0% /usr/local/var
/dev/mtdblock4           10240      1504      8736  15% /etc/zyxel
/dev/md1             3845217320    733324 3844483996   0% /i-data/a7c33296
/dev/md1             3845217320    733324 3844483996   0% /usr/local/zy-pkgs
/dev/md1             3845217320    733324 3844483996   0% /etc/zyxel/zy-pkgs
/dev/md1             3845217320    733324 3844483996   0% /usr/local/apache/htdocs/adv,/pkg
/dev/md1             3845217320    733324 3844483996   0% /usr/local/apache/web_framework/data/cache
/dev/mtdblock4           10240      1504      8736  15% /usr/local/apache/web_framework/data/config
/dev/md1             3845217320    733324 3844483996   0% /usr/local/apache/htdocs/adv,/res/imdb_poster
/dev/loop3           1922351504 1922132112    219392 100% /tmp/mountpoint
then:

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/i-data/a7c33296 # cp -r /tmp/mountpoint/ /i-data/a7c33296/Data4TB/
...and now I started to see first of my data flowing onto working NAS' 4TB disc:
Screenshot_1.jpg
Thanks a LOT Mijzelf! Hope this thread will help somebody in similar troubles.
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