[linux-lvm] Re: Strange RAID2 behavier...

[me at vger.org]

Works with 1.0.4 so this is a bug with 1.1-rc2.

On Thu, 30 May 2002 me at vger.org wrote:

> Here is more info:
> --------------
> # /etc/init.d/raid2 start
> Starting RAID devices: /dev/md0 /dev/md1 /dev/md2 /dev/md3
> done.
> # /etc/init.d/raid2 stop 
> Stopping RAID devices: /dev/md0 /dev/md1 /dev/md2 /dev/md3
> done.
> # /etc/init.d/raid2 start
> Starting RAID devices: /dev/md0 /dev/md1 /dev/md2 /dev/md3
> done.
> # modprobe lvm-mod
> # vgscan
> vgscan -- reading all physical volumes (this may take a while...)
> vgscan -- found inactive volume group "data"
> vgscan -- "/etc/lvmtab" and "/etc/lvmtab.d" successfully created
> vgscan -- WARNING: This program does not do a VGDA backup of your volume group
> 
> # vgchange -ay
> vgchange -- volume group "data" successfully activated
> 
> # mount /dev/data/lvol1 /mnt
> # df
> Filesystem           1k-blocks      Used Available Use%
> Mounted on
> /dev/data/lvol1      ********        20 ********   1% /mnt
> # umount /mnt
> # vgchange -an
> vgchange -- volume group "data" successfully deactivated
> 
> # rmmod lvm-mod
> # /etc/init.d/raid2 stop
> Stopping RAID devices: /dev/md0 /dev/md1 /dev/md2: Device or resource busy
> /dev/md3: Device or resource busy
> done.
> # cat /proc/mdstat 
> Personalities : [linear] [raid0] [raid1] [raid5] [multipath] 
> 
> read_ahead 1024 sectors
> md3 : active raid0 hdl1[1] hdh1[0]
>       ******** blocks 4k chunks
>       
> md2 : active linear hdk1[0]
>       ******** blocks 4k rounding
>       
> unused devices: <none>
> # /etc/init.d/raid2 stop
> Stopping RAID devices: /dev/md2: Device or resource busy
> /dev/md3: Device or resource busy
> done.
> --------------
> 
> Going to switch to lvm-1.0.4 and try.
> 
> On Thu, 30 May 2002 me at vger.org wrote:
> 
> > No worry linux-kernel, this seams to be a lvm problem.
> > 
> > Hi linux-lvm,
> > 
> > In short, I got 4 md devices (md0-4) that I make one device with using
> > lvm. When I'm going to shutdown this device it seams that lvm locks md2-3.
> > 
> > Booting linux without lvm there is no problem what so ever to start and
> > stop the raid mds.
> > 
> > Also as you read the futher down, the reason I could stop md3 was because
> > I hadnt used lvm yet that time and hadnt made any VGs or LVs or mounted
> > them. Also, the way i stop lvm is as described in the documents "umount,
> > vgchange -an".
> > 
> > Im using lvm-1.1rc-2, 2.4.19-pre9 and debian testing dist.
> > 
> > Im going to try running lvm as module and unloading the module after
> > stopping the lvm VGs and see if it still locks the mds.
> > 
> > If you need more info, please send a mail.
> > 
> 
>