RE: Problems adding ext3 file system to software raid

["James D. Parra" <JamesP MusicReports com>]

Thanks Steve,

It looks like I have created a big mess. The original RAID was set up during
the install and mounted as /raid.  After adding another ide drive, I edited
the 'raidtab' file to reflect what we needed; that is, changed from 3 drives
at raid 0, to 4 drives at raid 5 with one drive set as a spare. I did not
alter the 'fstab' file which may have been my undoing.

Currently the /raid directory appears under / and issuing "fuser -m /raid"
dumps the following;

/raid:                   1     1r     1c     1e     2     2r     2c     3
3r 
     3c     4     4r     4c     5     5r     5c     6     6r     6c     7
7r 
     7c     8     8r     8c    13    13r    13c    92    92r    92c   185
185r 
   185c   186   186r   186c   187   187r   187c   568   568r   568c   568e
573 ...etc

I've truncated the remainder for brevity.  "fuser -m /dev/md0" returned
nothing. 'umount' shows /raid unmounted.

Here is the 'raidtab';

raiddev             /dev/md0
raid-level                  5
nr-raid-disks               3
chunk-size                  64k
persistent-superblock       1
nr-spare-disks              1
    device          /dev/hde1
    raid-disk     0
    device          /dev/hdf1
    raid-disk     1
    device          /dev/hdg1
    raid-disk     2
    device          /dev/hdh1
    spare-disk    1

And cat /proc/mdstat shows;
Personalities : [raid0] 
read_ahead not set
unused devices: <none>

and 'fstab';

LABEL=/                 /                       ext3    defaults        1 1
none                    /dev/pts                devpts  gid=5,mode=620  0 0
LABEL=/home             /home                   ext3    defaults        1 2
none                    /proc                   proc    defaults        0 0
none                    /dev/shm                tmpfs   defaults        0 0
#LABEL=/raid            /raid                   ext3    defaults        1 2
LABEL=/usr              /usr                    ext3    defaults        1 2
LABEL=/var              /var                    ext3    defaults        1 2
/dev/hda6               swap                    swap    defaults        0 0
/dev/cdrom              /mnt/cdrom              iso9660
noauto,owner,kudzu,ro 0 0
/dev/fd0                /mnt/floppy             auto    noauto,owner,kudzu 0
0


The '#LABEL=/raid' was commented out so we could reboot the server, which
would hang running the auto fsck.

Also, 'mkraid' gives the following error;

handling MD device /dev/md0
analyzing super-block
/dev/hde1: device too small (0kB)
mkraid: aborted.
(In addition to the above messages, see the syslog and /proc/mdstat as well
 for potential clues.)

All four drives are 20 Gb.

At this point, I'd like to start from scratch, but not do a reinstall. Any
sugestions?

Thank you,

James D. Parra
JamesP MusicReports com


-----Original Message-----
From: Stephen Gevers [mailto:steve gevers5 com]
Sent: Monday, July 01, 2002 11:21 AM
To: redhat-list redhat com
Subject: Re: Problems adding ext3 file system to software raid


The problem may be that there is one or more processes which have open 
files (including the working directory) which are preventing you from 
unmounting the device.  I don't think that the raid has anything to do 
with it.  Try entering the command "fuser -m /dev/md0" to get a list of 
process ids of processes using the md0 device.

How do you have it formatted now?  What are the results of a "mount" 
command?  It should tell you what file systems are mounted (including 
/raid) and what file system type the device is.

Once you manage to get the device unmounted, you can simply invoke the 
command "mkfs -t  ext3 /dev/md0" to make an ext3 filesystem on it.

Steve

James D. Parra wrote:

>Hello,
>
>I am getting an error attempting to unmount a raid on /dev/md0. 
>
>umount /raid: device is busy.
>
>I tried stopping the raid, with 'raidstop', but still can't 'umount' the
>raid.
>
>
>After creating an ide raid with raid5 and one spare, how does one format
the
>raid, /dev/md0, with an ext3 file system.
>
>Currently 'fstab' shows the following for the raid:
>
>LABEL=/raid	/raid 	ext3 defaults	1 2
>
>
>Any help would be greatly appreciated.
>
>James D. Parra
>JamesP MusicReports com
>
>
>
>_______________________________________________
>Redhat-list mailing list
>Redhat-list redhat com
>https://listman.redhat.com/mailman/listinfo/redhat-list
>  
>





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