error during raid config

error during raid config

[gannan10]

From:  gannan10@comcast.net  [ Save Address ]  
To:  linux-raid@vger.rutgers.edu 
Subject:  error during raid config 
Date:  Fri, 16 Jan 2004 05:27:40 +0000 


Hello,

I get the following error when I tried to setup my raid:

# mkraid /dev/md0
handling MD device /dev/md0
analyzing super-block
disk 0: /dev/hda1, 489951kB, raid superblock at 489856kB
/dev/hda1 is mounted
mkraid: aborted, see the syslog and /proc/mdstat for potential clues.

Here is my config information:

# cat /proc/mdstat
Personalities :
read_ahead not set
unused devices: <none>

cat /etc/raidtab
# Persistent raid-1 configuration - md0
raiddev                 /dev/md0
raid-level              1
nr-raid-disks           2
nr-spare-disks          0
persistent-superblock   1
chunk-size              4

device                  /dev/hda1
raid-disk               0

device                  /dev/hdb1
raid-disk               1

# Persistent raid-1 configuration - md1
raiddev                 /dev/md1
raid-level              1
nr-raid-disks           2
nr-spare-disks          0
persistent-superblock   1
chunk-size              4

device                  /dev/hda3

raid-disk               0

device                  /dev/hdb3
raid-disk               1

# Persistent raid-1 configuration - md2
raiddev                 /dev/md2
raid-level              1
nr-raid-disks           2
nr-spare-disks          0
persistent-superblock   1
chunk-size              4

device                  /dev/hda5
raid-disk               0

device                  /dev/hdb5
raid-disk               1

# Persistent raid-1 configuration - md3
raiddev                 /dev/md3
raid-level              1
nr-raid-disks           2
nr-spare-disks          0
persistent-superblock   1
chunk-size              4

device                  /dev/hda6
raid-disk               0

device                  /dev/hdb6
raid-disk               1

# Persistent raid-1 configuration - md4
raiddev                 /dev/md4
raid-level              1
nr-raid-disks           2
nr-spare-disks          0
persistent-superblock   1
chunk-size              4

device                  /dev/hda7

raid-disk               0

device                  /dev/hdb7
raid-disk               1


# fdisk -l /dev/hda

Disk /dev/hda: 255 heads, 63 sectors, 4111 cylinders
Units = cylinders of 16065 * 512 bytes

   Device Boot    Start       End    Blocks   Id  System
/dev/hda1   *         1        61    489951   fd  Linux raid autodetect
/dev/hda2            62       122    489982+  82  Linux swap
/dev/hda3           123       495   2996122+  fd  Linux raid autodetect
/dev/hda4           496      4111  29045520    5  Extended
/dev/hda5           496      1700   9679131   fd  Linux raid autodetect
/dev/hda6          1701      2905   9679131   fd  Linux raid autodetect
/dev/hda7          2906      4111   9687163+  fd  Linux raid autodetect

# fdisk -l /dev/hdb

Disk /dev/hdb: 255 heads, 63 sectors, 4865 cylinders
Units = cylinders of 16065 * 512 bytes

   Device Boot    Start       End    Blocks   Id  System
/dev/hdb1             1        61    489951   fd  Linux raid autodetect

/dev/hdb2            62       122    489982+  82  Linux swap
/dev/hdb3           123       495   2996122+  fd  Linux raid autodetect
/dev/hdb4           496      4111  29045520    5  Extended
/dev/hdb5           496      1700   9679131   fd  Linux raid autodetect
/dev/hdb6          1701      2905   9679131   fd  Linux raid autodetect
/dev/hdb7          2906      4111   9687163+  fd  Linux raid autodetect

Re: error during raid config

[Steven Ihde]

On Fri, Jan 16, 2004 at 06:18:07PM +0000, gannan10@comcast.net wrote:
> Hello,
> 
> I get the following error when I tried to setup my raid:
> 
> # mkraid /dev/md0
> handling MD device /dev/md0
> analyzing super-block
> disk 0: /dev/hda1, 489951kB, raid superblock at 489856kB
> /dev/hda1 is mounted
> mkraid: aborted, see the syslog and /proc/mdstat for potential clues.

I use mdadm, not mkraid, but it appears the problem is right there:
"/dev/hda1 is mounted".  Probably if you have a mounted filesystem on
/dev/hda1, you cannot add it to the raid array.  Once you've created
the raid array you can mount /dev/md0 instead of /dev/hda1.

-Steve

Re: error during raid config

[gannan10]

so what do I do now???
> On Fri, Jan 16, 2004 at 06:18:07PM +0000, gannan10@comcast.net wrote:
> > Hello,
> > 
> > I get the following error when I tried to setup my raid:
> > 
> > # mkraid /dev/md0
> > handling MD device /dev/md0
> > analyzing super-block
> > disk 0: /dev/hda1, 489951kB, raid superblock at 489856kB
> > /dev/hda1 is mounted
> > mkraid: aborted, see the syslog and /proc/mdstat for potential clues.
> 
> I use mdadm, not mkraid, but it appears the problem is right there:
> "/dev/hda1 is mounted".  Probably if you have a mounted filesystem on
> /dev/hda1, you cannot add it to the raid array.  Once you've created
> the raid array you can mount /dev/md0 instead of /dev/hda1.
> 
> -Steve
> 
> 
> 

RE: error during raid config

[Guy]

Give output of df command.  If hda1 is listed, then unmount it!

-----Original Message-----
From: linux-raid-owner@vger.kernel.org
[mailto:linux-raid-owner@vger.kernel.org] On Behalf Of gannan10@comcast.net
Sent: Friday, January 16, 2004 3:14 PM
To: Steven Ihde
Cc: linux-raid@vger.kernel.org
Subject: Re: error during raid config

so what do I do now???
> On Fri, Jan 16, 2004 at 06:18:07PM +0000, gannan10@comcast.net wrote:
> > Hello,
> > 
> > I get the following error when I tried to setup my raid:
> > 
> > # mkraid /dev/md0
> > handling MD device /dev/md0
> > analyzing super-block
> > disk 0: /dev/hda1, 489951kB, raid superblock at 489856kB
> > /dev/hda1 is mounted
> > mkraid: aborted, see the syslog and /proc/mdstat for potential clues.
> 
> I use mdadm, not mkraid, but it appears the problem is right there:
> "/dev/hda1 is mounted".  Probably if you have a mounted filesystem on
> /dev/hda1, you cannot add it to the raid array.  Once you've created
> the raid array you can mount /dev/md0 instead of /dev/hda1.
> 
> -Steve
> 
> 
> 

-
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: error during raid config

[gannan10]

the command worked for other md(1 - 4) and the cat /proc/mdstat looks like the following:

# cat /proc/mdstat
Personalities : [raid1]
read_ahead 1024 sectors
md4 : active raid1 hdb7[0]
      9687040 blocks [2/1] [U_]

md3 : active raid1 hdb6[0]
      9679040 blocks [2/1] [U_]

md2 : active raid1 hdb5[0]
      9679040 blocks [2/1] [U_]

md1 : active raid1 hdb3[0]
      2996032 blocks [2/1] [U_]

md0 : inactive
unused devices: <none>


Now when I use mkraid for md0 I get the following error:

# mkraid --really-force /dev/md0
DESTROYING the contents of /dev/md0 in 5 seconds, Ctrl-C if unsure!
handling MD device /dev/md0
analyzing super-block
disk 0: /dev/hdb1, 489951kB, raid superblock at 489856kB
disk 1: /dev/hda1, failed
mkraid: aborted, see the syslog and /proc/mdstat for potential clues.

the syslog shows this:

---Jan 16 14:16:17 adobea kernel: md: array md0 already exists!

I alos tried mounting it and I get the following error:

~# mount -t ext2 /dev/md0 /mnt
mount: wrong fs type, bad option, bad superblock on /dev/md0,
       or too many mounted file systems
       (could this be the IDE device where you in fact use
       ide-scsi so that sr0 or sda or so is needed?)


Please help..   I am using procedure at: http://tldp.org/HOWTO/Boot+Root+Raid+LILO-4.html

Thanks
Gordon.


> On Fri, Jan 16, 2004 at 06:18:07PM +0000, gannan10@comcast.net wrote:
> > Hello,
> > 
> > I get the following error when I tried to setup my raid:
> > 
> > # mkraid /dev/md0
> > handling MD device /dev/md0
> > analyzing super-block
> > disk 0: /dev/hda1, 489951kB, raid superblock at 489856kB
> > /dev/hda1 is mounted
> > mkraid: aborted, see the syslog and /proc/mdstat for potential clues.
> 
> I use mdadm, not mkraid, but it appears the problem is right there:
> "/dev/hda1 is mounted".  Probably if you have a mounted filesystem on
> /dev/hda1, you cannot add it to the raid array.  Once you've created
> the raid array you can mount /dev/md0 instead of /dev/hda1.
> 
> -Steve
> 
> 
> 

RE: error during raid config

[Guy]

md1-4 all have 1 disk missing!  Maybe that is a clue!
Is your disk hda bad?

Most people say mkraid is bad.  You should use mdadm.  I agree.

-----Original Message-----
From: linux-raid-owner@vger.kernel.org
[mailto:linux-raid-owner@vger.kernel.org] On Behalf Of gannan10@comcast.net
Sent: Friday, January 16, 2004 3:19 PM
To: Steven Ihde
Cc: linux-raid@vger.kernel.org
Subject: Re: error during raid config

the command worked for other md(1 - 4) and the cat /proc/mdstat looks like
the following:

# cat /proc/mdstat
Personalities : [raid1]
read_ahead 1024 sectors
md4 : active raid1 hdb7[0]
      9687040 blocks [2/1] [U_]

md3 : active raid1 hdb6[0]
      9679040 blocks [2/1] [U_]

md2 : active raid1 hdb5[0]
      9679040 blocks [2/1] [U_]

md1 : active raid1 hdb3[0]
      2996032 blocks [2/1] [U_]

md0 : inactive
unused devices: <none>


Now when I use mkraid for md0 I get the following error:

# mkraid --really-force /dev/md0
DESTROYING the contents of /dev/md0 in 5 seconds, Ctrl-C if unsure!
handling MD device /dev/md0
analyzing super-block
disk 0: /dev/hdb1, 489951kB, raid superblock at 489856kB
disk 1: /dev/hda1, failed
mkraid: aborted, see the syslog and /proc/mdstat for potential clues.

the syslog shows this:

---Jan 16 14:16:17 adobea kernel: md: array md0 already exists!

I alos tried mounting it and I get the following error:

~# mount -t ext2 /dev/md0 /mnt
mount: wrong fs type, bad option, bad superblock on /dev/md0,
       or too many mounted file systems
       (could this be the IDE device where you in fact use
       ide-scsi so that sr0 or sda or so is needed?)


Please help..   I am using procedure at:
http://tldp.org/HOWTO/Boot+Root+Raid+LILO-4.html

Thanks
Gordon.


> On Fri, Jan 16, 2004 at 06:18:07PM +0000, gannan10@comcast.net wrote:
> > Hello,
> > 
> > I get the following error when I tried to setup my raid:
> > 
> > # mkraid /dev/md0
> > handling MD device /dev/md0
> > analyzing super-block
> > disk 0: /dev/hda1, 489951kB, raid superblock at 489856kB
> > /dev/hda1 is mounted
> > mkraid: aborted, see the syslog and /proc/mdstat for potential clues.
> 
> I use mdadm, not mkraid, but it appears the problem is right there:
> "/dev/hda1 is mounted".  Probably if you have a mounted filesystem on
> /dev/hda1, you cannot add it to the raid array.  Once you've created
> the raid array you can mount /dev/md0 instead of /dev/hda1.
> 
> -Steve
> 
> 
> 

-
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html