Re: sofware raid does not show the full partition size on disk

[Siju George <sgeorge.ml@gmail.com>]

On Thu, Jun 11, 2009 at 7:48 PM, martin f krafft<madduck@debian.org> wrote:
> Have you ever modified the partition table to increase the size of
> the partition?
>

yes I replaced the two 40 GB Disks with 2 80GB Disks

> Have you made a backup?
>

no

> Does it work if you unmount /var and then try
>
>  mdadm --grow --size=max /dev/md6
>
> and then xfs_grow or whatever it's called for XFS?
>

I ran

mdadm --grow --size=max /dev/md6

without unmounting /var

and the array showed the right size.

# mdadm -D /dev/md6
/dev/md6:
        Version : 00.90.01
  Creation Time : Thu Jan 11 22:49:09 2007
     Raid Level : raid1
     Array Size : 67159616 (64.05 GiB 68.77 GB)
    Device Size : 67159616 (64.05 GiB 68.77 GB)
   Raid Devices : 2
  Total Devices : 2
Preferred Minor : 6
    Persistence : Superblock is persistent

    Update Time : Fri Jun 12 15:04:17 2009
          State : clean
 Active Devices : 2
Working Devices : 2
 Failed Devices : 0
  Spare Devices : 0

           UUID : f6debdab:76d34e2d:7e8db578:e8db3dc4
         Events : 0.18775645

    Number   Major   Minor   RaidDevice State
       0       3        8        0      active sync   /dev/hda8
       1      22        8        1      active sync   /dev/hdc8


then I ran

#xfs_growfs /var

with /var mounted and now the file system also shows the correct size. :-)

~# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/md2              953M  519M  435M  55% /
tmpfs                 237M     0  237M   0% /lib/init/rw
tmpfs                 237M     0  237M   0% /dev/shm
/dev/md1              221M   11M  199M   6% /boot
/dev/md4              953M   39M  914M   5% /home
/dev/md5              1.9G  1.6M  1.9G   1% /tmp
/dev/md3              4.7G  1.1G  3.7G  23% /usr
/dev/md6               65G   23G   42G  36% /var

THANKS A MILLION MARTIN :-)))))))))))

--Siju