fdisk expert print lists wrong start sector for logical partitions

fdisk expert print lists wrong start sector for logical partitions

[Phillip Susi]

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The expert print function shows all logical partitions as having the
same start sector as the extended partition that contains them.

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Re: fdisk expert print lists wrong start sector for logical partitions

[Karel Zak]

On Wed, Nov 13, 2013 at 11:06:24AM -0500, Phillip Susi wrote:
> The expert print function shows all logical partitions as having the
> same start sector as the extended partition that contains them.

Normal mode:

 Device    Boot     Start       End Blocks  Id System
 /dev/sdb1           2048     22527  10240  83 Linux
 /dev/sdb2          22528   1228799 603136   5 Extended
 /dev/sdb5          24576    229375 102400  83 Linux
 /dev/sdb6         231424   1228799 498688  83 Linux

Expert mode:

 Nr AF   Hd Sec Cyl   Hd Sec Cyl     Start      Size Id
  1 00   32  33   0  102  37   1      2048     20480 83
  2 00  102  38   1  124  48  76     22528   1206272 05
  3 00    0   0   0    0   0   0         0         0 00
  4 00    0   0   0    0   0   0         0         0 00
  5 00  135   7   1   70  56  14      2048    204800 83
  6 00  103  26  14  124  48  76      2048    997376 83

It's correct, although probably it seems strange at a first glance.

It dumps MBR and EBR tables, nothing else. It means that you can
see all the values as stored on the device without any calculation.

I agree that this info is not too useful. Maybe we can change this old
thing and describe the whole chain of the MBR->EBR->EBR... in more
readable and more precise way. Not sure, but I guess nobody cares
about this output backward compatibility.

    Karel


-- 
 Karel Zak  <kzak@redhat.com>
 http://karelzak.blogspot.com

Re: fdisk expert print lists wrong start sector for logical partitions

[Phillip Susi]

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On 11/14/2013 6:57 AM, Karel Zak wrote:
> It's correct, although probably it seems strange at a first
> glance.
> 
> It dumps MBR and EBR tables, nothing else. It means that you can 
> see all the values as stored on the device without any
> calculation.

So it isn't saying the partition starts at sector 2048, but rather it
is 2048 sectors from the EBR?


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Re: fdisk expert print lists wrong start sector for logical partitions

[Karel Zak]

On Thu, Nov 14, 2013 at 11:24:31AM -0500, Phillip Susi wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> On 11/14/2013 6:57 AM, Karel Zak wrote:
> > It's correct, although probably it seems strange at a first
> > glance.
> > 
> > It dumps MBR and EBR tables, nothing else. It means that you can 
> > see all the values as stored on the device without any
> > calculation.
> 
> So it isn't saying the partition starts at sector 2048, but rather it
> is 2048 sectors from the EBR?

 Yep.
    Karel

> 
> 
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-- 
 Karel Zak  <kzak@redhat.com>
 http://karelzak.blogspot.com