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Old 11-25-2012, 06:25 AM   #1
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Registered: Jan 2012
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crazy partition puzzle (ext4+ntfs+ufs)

I have been trying to solve this problem for approximately a few days now, but neither coffee nor beer help...

The topic is as follows.

There are 2 hard drives: /dev/sda where safely nest win and backtrack,
and /dev/sdb that partitioned as:
  1. 119 Gb - ext4 (archive, named [New Volume])
  2. Extended partition, divided in
    • 107 Gb - ntfs
    • 88 Gb - ntfs
    • 5 Gb - unallocated
  3. 5 Gb - swap (probably belongs to no system but could be used as additional swap by debian from /dev/sda)
Gnome-disk-utility showed 119 Gb situated in the beginning of hard drive, as I could remember.

After installation of freebsd on that 107 Gb partition (facepalm...blonde...haven't thought ) and, moreover, merging of those 5 Gb partiotions into one 10 Gb of freebsd swap (during freebsd installation it asked about segment sizes but I told to keep them as is), 119 Gb disk was ok, freebsd booted from grub as hd1,2,a i.e. from 3rd partition of 2nd hard drive, /dev/sdb3, and was ok too, but 88 Gb disk disappeared as one should expect. Moreover, there appeared /dev/sdc1, /dev/sdc2,...,/dev/sdc6 respectivelly to amount of freebsd drives that were created during installation (/usr,/var,/tmp...).

Having thought something like "partition flew, nothing to worry about, we'll restore it..." I ran testdisk from /dev/sda's backtrack. 88Gb disk appeared and worked fine, but... all other partitions disappeared.

Next testdisk resulted, if to believe to gnome-disk-utility and testdisk, in the mixed mosaic of partitions on 2nd hard drive in the order like:
sdc1-sdb1-sdc2-sdb2-sdc3...or even other words, it mixed all the disks on /dev/sdb and those begins from some of ufs disk instead of ext4 [New Volume].

Now testdisk shows it like:
Disk /dev/sdb - 320 GB / 298 GiB - CHS 38914 255 63
     Partition               Start        End    Size in sectors
>D Linux Swap               0   1  1   126 254 47    2040176
 D Linux                    0  32 33 14480 241 33  232634368 [New Volume]
 D HPFS - NTFS           1427   1  1 14480 254 63  209712447
 D Linux                 7073  55 23 21554   9 23  232634368 [New Volume]
 D FreeBSD              14480 241 34 27534 253 62  209713295
 D HPFS - NTFS          14481   1  1 27534 254 63  209712447
 D HPFS - NTFS          27535   1  1 38258  49 54  172268073
 D HPFS - NTFS          27535   1  1 38912 254 63  182787507
 D Linux Swap           38258  69 20 38913  69 52   10522608
 D Linux Swap           38878  22 57 38913  69 52     565232
root@bt:~# fdisk -l /dev/sdb

Disk /dev/sdb: 320.1 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x891f2998

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1            7074       21555   116317184   83  Linux
The thing that I don't like the most is that [New Volume] starts not at the beginning of /dev/sdb and there is a space before it.

So, what types should be assigned to partitions to everything work fine? And why did that /dev/sdc occured as a separated unit? I've stucked with this stuff... , any suggestions how to solve this puzzle? I don't care already about the rest of partitions, I only want the 119 Gb disk is to returned.
Old 11-25-2012, 07:08 AM   #2
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Registered: Jan 2012
Posts: 26

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Well, fine, another overdose of coffee led to deleting all the partitions and creating of 119 Gb by force specially at the very beginning of drive, despite I was not sure about direct size in bytes of it. Booted from dvd to be sure that none of /dev/sdb's parts is in use. It mounts. Haven't checked the structure of files yet but if mounts I believe that could be read? Then the question remains if there is a possibility to assign "right" types to the rest of partitions? And why did that "extra" /dev/sdc appear?

Last edited by deswarf; 11-25-2012 at 07:54 AM.
Old 11-26-2012, 08:38 AM   #3
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Registered: Jan 2012
Posts: 26

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Solved by forced repartitioning "by hands" without relying on testdisk. Files saved.


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