I recently lost 10H of work because fdisk did something very bad: it created
multiple partitions starting in the same place, and when I mkfs'ed sda2, it
overwrote enough of sda4 to trash it beyond repair as well as killed linux by
writing over its swap on sda3
This is what my partitions looked like before I lost my system:
Disk /dev/sda: 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: 0x0b8ccbaa
Device Boot Start End Blocks Id System
/dev/sda1 2048 1050623 524288 83 Linux
/dev/sda2 1050624 105908223 52428800 0 Empty
/dev/sda3 1050624 34605055 16777216 82 Linux swap / Solaris
/dev/sda4 34605056 1953525167 959460056 83 Linux
Sure enough, it's reproduceable.
I'm kind of very late and should go to bed (doing a full restore of my laptop now from
backup). Would you be able to pass this to the right folks?
gandalfthegreat:~# dpkg -l util-linux
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-===================-==============-==============-============================================
ii util-linux 2.20.1-5.5 amd64 Miscellaneous system utilities
gandalfthegreat:~# fdisk -v
fdisk (util-linux 2.20.1)
gandalfthegreat:~#
(I'm using -H32 -S32 here, but last time, I ran fdisk without them)
gandalfthegreat:/var/tmp# fdisk -H32 -S32 /dev/sda
Command (m for help): p
Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
32 heads, 32 sectors/track, 1907739 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: 0x0b8ccbaa
Device Boot Start End Blocks Id System
/dev/sda1 2048 1050623 524288 83 Linux
/dev/sda2 1050624 105908223 52428800 0 Empty
Command (m for help): n
Partition type:
p primary (1 primary, 0 extended, 3 free)
e extended
Select (default p): p
Partition number (1-4, default 3):
Using default value 3
First sector (1050624-1953525167, default 1050624): 105908224 << eek default is bad
Last sector, +sectors or +size{K,M,G} (105908224-1953525167, default 1953525167): +16G
Command (m for help): n
Partition type:
p primary (2 primary, 0 extended, 2 free)
e extended
Select (default p): p
Selected partition 4
First sector (1050624-1953525167, default 1050624): << eek default is bad again
Using default value 1050624
Last sector, +sectors or +size{K,M,G} (1050624-105908223, default 105908223):
Using default value 105908223
Command (m for help): p
Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
32 heads, 32 sectors/track, 1907739 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: 0x0b8ccbaa
Device Boot Start End Blocks Id System
/dev/sda1 2048 1050623 524288 83 Linux
/dev/sda2 1050624 105908223 52428800 0 Empty
/dev/sda3 105908224 139462655 16777216 83 Linux
/dev/sda4 1050624 105908223 52428800 83 Linux
This looks like a severe bug.
Kernel was 3.11 if that helps.
Disk is:
Device Model: Samsung SSD 840 EVO 1TB
Serial Number: S1D9NEAD934600N
LU WWN Device Id: 5 002538 85009a8ff
Firmware Version: EXT0BB0Q
User Capacity: 1,000,204,886,016 bytes [1.00 TB]
ATA Standard is: ATA-8-ACS revision 4c
Thanks,
Marc
--
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems ....
.... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/
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