raidreconf success report

raidreconf success report

[Alistair Riddell]

I am happy to report successfully using raidreconf to grow a 7 x 73GB
RAID5 to 10 x 73GB RAID5.

The operation took around 16 hours. Machine is a 4-way xeon with 6GB RAM;
though the kernel on the CD I booted from only supported UP/1GB RAM. I'm
not sure whether the extra CPUs/memory would have helped performance.
Disks are 10kRPM scsi disks.

The sequence of commands was:

boot from cd (raid is root filesystem)
reiserfsck /dev/md0
raidstop /dev/md0
raidreconf -o oldraidtab -n newraidtab -m /dev/md0
go home and sleep!
reiserfsck /dev/md0
resize_reiserfs /dev/md0
reiserfsck /dev/md0
then reboot, and machine carried on as before!

No errors were reported at any stage.

All very impressive. Thanks for the good work!

-- 
Alistair Riddell - BOFH
IT Manager, George Watson's College, Edinburgh
Tel: +44 131 446 6070    Fax: +44 131 452 8594
Microsoft - because god hates us

Re: raidreconf success report

[Steve Brueggeman]

This is the first I've heard of raidreconf.  

Where is it, and can it be used to reduce a RAID-5 configuration???

Steve Brueggeman

On Sun, 3 Nov 2002 16:33:09 +0000 (GMT), you wrote:

>I am happy to report successfully using raidreconf to grow a 7 x 73GB
>RAID5 to 10 x 73GB RAID5.
>
>The operation took around 16 hours. Machine is a 4-way xeon with 6GB RAM;
>though the kernel on the CD I booted from only supported UP/1GB RAM. I'm
>not sure whether the extra CPUs/memory would have helped performance.
>Disks are 10kRPM scsi disks.
>
>The sequence of commands was:
>
>boot from cd (raid is root filesystem)
>reiserfsck /dev/md0
>raidstop /dev/md0
>raidreconf -o oldraidtab -n newraidtab -m /dev/md0
>go home and sleep!
>reiserfsck /dev/md0
>resize_reiserfs /dev/md0
>reiserfsck /dev/md0
>then reboot, and machine carried on as before!
>
>No errors were reported at any stage.
>
>All very impressive. Thanks for the good work!

Re: raidreconf success report

[Adam Luter]

Even if it can, I haven't heard of any filesystem resizers that could
reduce.  (But I could be easily wrong).

-Adam

On Tue, Nov 05, 2002 at 11:14:51AM -0600, Steve Brueggeman wrote:
> This is the first I've heard of raidreconf.  
> 
> Where is it, and can it be used to reduce a RAID-5 configuration???
> 
> Steve Brueggeman
> 
> On Sun, 3 Nov 2002 16:33:09 +0000 (GMT), you wrote:
> 
> >I am happy to report successfully using raidreconf to grow a 7 x 73GB
> >RAID5 to 10 x 73GB RAID5.
> >
> >The operation took around 16 hours. Machine is a 4-way xeon with 6GB RAM;
> >though the kernel on the CD I booted from only supported UP/1GB RAM. I'm
> >not sure whether the extra CPUs/memory would have helped performance.
> >Disks are 10kRPM scsi disks.
> >
> >The sequence of commands was:
> >
> >boot from cd (raid is root filesystem)
> >reiserfsck /dev/md0
> >raidstop /dev/md0
> >raidreconf -o oldraidtab -n newraidtab -m /dev/md0
> >go home and sleep!
> >reiserfsck /dev/md0
> >resize_reiserfs /dev/md0
> >reiserfsck /dev/md0
> >then reboot, and machine carried on as before!
> >
> >No errors were reported at any stage.
> >
> >All very impressive. Thanks for the good work!