Re: Wrong disk size when partitioning

[Joel Granados]

----- "Raj Mathur" <address@hidden> wrote:

> On Tuesday 02 Dec 2008, Joel Granados wrote:
> > Hi Raj:
> >
> > What does `parted DEVCE print free` spit out?
> 
> Well, I rebooted into an Ubuntu live CD, which allowed me to view the
> 
> entire disk and make 15 partitions in a GPT partition table on it.  
> It's working fine.  However, see under...
> 
> > I'm wondering if it would help to just erase the partition table
> `dd
> > if=/dev/zero of=DEVICE bs=1024 count=20` and then create a new one
> > from scratch.
> 
> Oh damn, I thought the partition table was only the first 1024 bytes,
> 

Well, the count=20 is a bit of an overkill, but will ensure that you erase 
everything.  It would also be good to wipe out the last sector as there is 
where gpt stores its backup partition table.

> and had zeroed that out.  That hadn't helped.
> 
> In any case, there's still a potential problem with the other disks. 
> 
> Though they are working fine (15 partitions in a GPT each), no program
> 
> that I've tried is able to show the table (/dev/sdc is one of the
> other 
> 5 identical disks.  All of them show the same result):

So let me get this strait :)
/dev/{sda,sdb,sdc,sdd} show an error message. and /dev/sde gives the correct 
output?

what application did you use to partition the other disks?

> 
> parted /dev/sdc print
> Error: Unable to open /dev/sdc - unrecognised disk label.
> 
> While on the new disk (partitioned through parted on Ubuntu live):
> 
> parted /dev/sde print
> Disk /dev/sde: 750GB
> Sector size (logical/physical): 512B/512B
> Partition Table: gpt
> Number  Start   End     Size    File system  Name     Flags
>  1      17.4kB  50.0GB  50.0GB               primary  raid
>  2      50.0GB  100GB   50.0GB               primary  raid
>  3      100GB   150GB   50.0GB               primary  raid
>  4      150GB   200GB   50.0GB               primary  raid
>  5      200GB   250GB   50.0GB               primary  raid
>  6      250GB   300GB   50.0GB               primary  raid
>  7      300GB   350GB   50.0GB               primary  raid
>  8      350GB   400GB   50.0GB               primary  raid
>  9      400GB   450GB   50.0GB               primary  raid
> 10      450GB   500GB   50.0GB               primary  raid
> 11      500GB   550GB   50.0GB               primary  raid
> 12      550GB   600GB   50.0GB               primary  raid
> 13      600GB   650GB   50.0GB               primary  raid
> 14      650GB   700GB   50.0GB               primary  raid
> 15      700GB   750GB   50.2GB               primary  raid
> 
> This is on Debian Etch running kernel 2.6.18-5-686.  While it's not 
> currently impacting the system in any way, it's still a bit worrying
> to 
> think that I might not be able to view or change the partitions on the
> 
> other disks at a later stage in the running kernel.
> 
> Regards,
> 
> -- Raju
> -- 
> Raj Mathur                address@hidden     
> http://kandalaya.org/
>        GPG: 78D4 FC67 367F 40E2 0DD5  0FEF C968 D0EF CC68 D17F
> PsyTrance & Chill: http://schizoid.in/   ||   It is the mind that
> moves
> 
> 
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-- 
Joel Andres Granados
Red Hat / Brno Czech Republic