[CentOS] Disk partitions and LVM limits
Ross S. W. Walker
rwalker at medallion.com
Fri Feb 8 19:48:11 UTC 2008
Peter Blajev wrote:
>
> Hi,
>
> I've got a DAS DELL MD1000 with a bunch of SATA drives in
> RAID 5 configuration
> with total space of 5.4TB. This box is attached to a CentOS5
> system (kernel
> 2.6.18-53.1.6.el5).
>
> Any idea how to make this space usable?
> Is there a limit how big a partition can be? What is the work around?
> Is there a limit how big a file system ca be?
>
> I've tried to partition it but no matter how bug partition I
> create fdisk
> spits out these messages on the console:
> ---
> sdb: very big device. try to use READ CAPACITY(16).
> SCSI device sdb: 10248519680 512-byte hdwr sectors (5247242 MB)
> sdb: Write Protect is off
> ---
>
> I decided to not partition the drive and use LVM but the
> physical volume
> stopped at 2TB.
>
> So, right now I can't use LVM because of this 2TB limit and
> I'm not sure if I
> partition the drive how good these partitions are because of
> the the message
> from fdisk.
>
> Any help or idea is highly appreciated.
Undo the LVM config, wipe out any MBR or disklabels on the drive,
then pvcreate the raw disk (/dev/sdb) it should be able to handle
the whole 5.4TB.
-Ross
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