Re: Can't mount RAID 5: "Can't find ext3 filesystem"

On Wed, Feb 25, 2009 at 08:20:57AM +0100, Jose Legido wrote:
On Wed, Feb 25, 2009 at 3:33 AM, Alex Samad <alex@xxxxxxxxxxxx> wrote:
On Tue, Feb 24, 2009 at 07:29:12PM -0500, Jose Legido wrote:
On Tue, Feb 24, 2009 at 7:09 PM, Alex Samad <alex@xxxxxxxxxxxx> wrote:
On Tue, Feb 24, 2009 at 06:53:54PM -0500, Jose Legido wrote:
Hello!
I have one IDE hard disk hda with the system (debian testing)
I have a RAID5 with devices sda,b,c,d. My raid works fine.
One day, I reboot and my hda is converted to sda.

you upgraded your kernel ?  at some point in time the kernel started to
address sata devices as sd instead of the old way of hd.

No, I don't upgrade my kernel.

anything else change


My changes are made in /boot/initrd.img-2.6.26-1-686


start using LABEL or UUID instead of device paths like /dev/hda1.  check
/etc/fstab and your grub menu if you use grub of lilo

I change this later


as for the raid, check out the /etc/mdadm/mdadm.conf, make sure your md
devices are not defined with device, but with UUID's

My mdadm.conf
ARRAY /dev/md0 level=raid5 num-devices=4
UUID=0768075c:5ca2c100:d4d8cd15:f227f389

How can I know md0 filesystem?

what i would do is

reboot the system but with the kernel options init=/bin/bash (you can
edit a grub stanza at boot up time so no need to make it permanent)

then I would have a look at the system from the kernels perspective see
what drives are available hd's or sd's. work out the problem from there.

Then look at the raid device, I would try and assemble them (not
recreate them) and see what the problem is, have a look at dmesg and
syslog.


Too late.... I recreate, there are any diference in assemble and
recreate? Excuse me my ignorance....

recreate creates a new md device - blank, although there are some
options to make a create look like a assemble.

assemble is what the system does when it put the device together to make
the mdX device



Thanks!


I would work it from there.




Alex

I loaded an old kernel. Know, when I try to mount my RAID i get this error:
#  mount -t ext3 /dev/md0 /mnt/raid/
 VFS: Can't find ext3 filesystem on dev md0.

What can I do?

Thanks!!!!


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