Re: Can't access RAID - why?

[Rainer Clasen]

Hi!

Martin Schulze ([EMAIL PROTECTED]),
"Can't access RAID - why?":

> After that I added this MD device to the system:
> 
>   # mdadd /dev/md2
>   # cat /proc/mdstat
>   Personalities : [2 raid0]
>   read_ahead 8 sectors
>   md0 : active raid0 hda2 hdb2 819312 blocks 4k chunks
>   md1 : active raid0 hda4 hdb4 7405952 blocks 8k chunks
>   md2 : inactive sda2 sdb2 1984818 blocks
  

It isn't running.

Either supply "-r" to your mdadd command to add + run the device or
explicitly run it with mdrun /dev/md2 .



Rainer

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Can't access RAID - why?

[Martin Schulze]

Hi!

I've tried to access a third RAID0 in a system without any success but
a strange error message.

I've set up /dev/md2 with

# mdcreate -c8k raid0 /dev/md2 /dev/sda2 /dev/sdb2

which resulted in this line in /etc/mdtab:

# mdtab entry for /dev/md2
/dev/md2raid0,8k,0,0d445432 /dev/sda2 /dev/sdb2

After that I added this MD device to the system:

# mdadd /dev/md2
# cat /proc/mdstat
Personalities : [2 raid0]
read_ahead 8 sectors
md0 : active raid0 hda2 hdb2 819312 blocks 4k chunks
md1 : active raid0 hda4 hdb4 7405952 blocks 8k chunks
md2 : inactive sda2 sdb2 1984818 blocks
md3 : inactive

This looks ok so far.  However I'm unable to format  this new RAID
system:

# mke2fs /dev/md2
mke2fs 1.12, 9-Jul-98 for EXT2 FS 0.5b, 95/08/09
/dev/md2: Invalid argument passed to ext2 library while setting up 
superblock

I appreciate any hin wrt fixing this.  It sucks.

Regards,

Joey

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