Re: Partitions not detected

[Jim Meyering]

Ignaz Forster wrote:
> I fear I need some help with Parted.
> The two partitions of a disk are not detected, instead a message about
> a third partition is printed:
>
>
>> # parted /dev/sdc unit s print
>> No Implementation: Partition 3 isn't aligned to cylinder boundaries.
>> This is still unsupported.
>
>
> If I remember correctly the disk was partitioned using cfdisk, using
> byte values (instead of sectors) to specify the partition sizes. fdisk
> reports the following layout:
>
>
>> # fdisk -l -u /dev/sdc
>>
>> Disk /dev/sdc: 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: 0x14762e21
>>
>>    Device Boot      Start         End      Blocks   Id  System
>> /dev/sdc1              63   976559219   488279578+  83  Linux
>> /dev/sdc2       976559220  1953520064   488480422+  83  Linux
>
>
> The first partition contains a XFS, the second one a JFS filesystem.
>
> If my calculation is right at least the first partition should be
> aligned to cylinder boundaries, but temporarily deleting the second
> partition did not help either.
> Any hint why Parted doesn't see those partitions?

Thanks for the report, but what version of parted are you using?

If you're using a relatively recent version of parted,
then the fact that you're seeing that diagnostic means
that device has a PC98 partition table (or at least that
parted detects it as such -- which may be a bug in parted).

If you're not using parted-2.2 or 2.3,
I suggest you upgrade and try again.

If you are using one of those, please make a copy of
the first few sectors of your disk and send them to this list.
I.e., you could run this and then attach the file F:

    dd if=/dev/sdc count=34 > F