Re: Running slower after raid0
On Tue, 2005-11-01 at 11:05 -0200, Bruno Diniz wrote:
> Hi all,
>
> I have a system with two S-ATA hard disks and I configured raid0 with
> them using mdadm. Each HD has 200GB of capacity. What is weird is that
> after configuring the raid, the newly created device (/dev/md0) is
> slower than each of the disks individually. Look at the numbers:
>
[snip]
>
> cat /etc/mdadm/mdadm.conf
>
> DEVICE partitions
> ARRAY /dev/md1 level=raid0 num-devices=2
> UUID=b659b438:39b787dc:02f341ed:480bddf3
> devices=/dev/sdc3,/dev/sdd2
> ARRAY /dev/md0 level=raid0 num-devices=2
> UUID=4d999bad:c9c3cf0e:91fd35b1:57f5529c
> devices=/dev/sda1,/dev/sdb1
>
> The /dev/md1 array is working correctly, and its bandwidth is twice as
> much as each individual disk bw. The only difference between md0 and
> md1 is their capacity and that md0 is formatted with XFS, while md1
> uses Reiserfs.
>
> What could be the problem? Could it be XFS?
I'd make the partitions as exactly alike as possible, including
the filesystems.
--
-----------------------------------------------------------------
Ron Johnson, Jr.
Jefferson, LA USA
PGP Key ID 8834C06B I prefer encrypted mail.
"It's springtime for Hitler, and Germany..."
Reply to: