Public bug reported:
When using a USB 2.0 external hard disc, fdisk does not appear to create
valid partition tables.
-------snip--------
[EMAIL PROTECTED]:~$ sudo fdisk -l /dev/sdc
Disk /dev/sdc: 300.0 GB, 300069052416 bytes
255 heads, 63 sectors/track, 36481 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk /dev/sdc doesn't contain a valid partition table
[EMAIL PROTECTED]:~$ sudo fdisk /dev/sdc
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF
disklabel
Building a new DOS disklabel. Changes will remain in memory only,
until you decide to write them. After that, of course, the previous
content won't be recoverable.
The number of cylinders for this disk is set to 36481.
There is nothing wrong with that, but this is larger than 1024,
and could in certain setups cause problems with:
1) software that runs at boot time (e.g., old versions of LILO)
2) booting and partitioning software from other OSs
(e.g., DOS FDISK, OS/2 FDISK)
Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-36481, default 1):
Using default value 1
Last cylinder or +size or +sizeM or +sizeK (1-36481, default 36481):
Using default value 36481
Command (m for help): p
Disk /dev/sdc: 300.0 GB, 300069052416 bytes
255 heads, 63 sectors/track, 36481 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdc1 1 36481 293033601 83 Linux
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
[EMAIL PROTECTED]:~$ sudo fdisk -l /dev/sdc
Disk /dev/sdc: 300.0 GB, 300069052416 bytes
255 heads, 63 sectors/track, 36481 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk /dev/sdc doesn't contain a valid partition table
-------snip--------
/var/log/syslog says:
-------snip--------
31.08.2006 13:36:59 localhost kernel [17191377.892000] SCSI device
sdc: 586072368 512-byte hdwr sectors (300069 MB)
31.08.2006 13:36:59 localhost kernel [17191377.892000] sdc: assuming
drive cache: write through
31.08.2006 13:36:59 localhost kernel [17191377.892000] sdc: unknown
partition table
-------snip--------
The hardware setup is a Lenovo 3000 N100 Laptop, the external USB drive a 300
GB TrekStor.
Stephan
Note: the original reporter indicated the bug was in package 'fdisk';
however, that package was not published in Ubuntu.
** Affects: Ubuntu
Importance: Untriaged
Status: Unconfirmed
--
fdisk doesn't write partition table
https://launchpad.net/bugs/58331
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