Comments on: Upgrading Linux software RAID-1 array

By: Daniel Kahn Gillmor

Daniel Kahn Gillmor — Mon, 09 Feb 2009 22:09:38 +0000

It seems to me like the above process is more painful than it needs to be today.

* you can run grub-install /dev/sda && grub-install /dev/sdb before the second reboot. that way, if your BIOS is capable of booting from the second disk, you shouldn’t need to wrestle with the rescue CD

* you can resize ext3 filesystems while they’re mounted today (as long as they’re growing, not shrinking) — no need to drop to single-user mode.

By: Darrell Vermaak

Darrell Vermaak — Thu, 15 May 2008 09:20:29 +0000

Thanks for the article – very useful!

I was using a Reiserfs on RAID1 – had to resize the raid after repartitioning the disks and hot adding them to the raid by using
mdadm –grow /dev/md1 –size=max
then unmount the /dev/md1
then run resize_reiserfs /dev/md1
this resyncs the disks/raid – to speed up the process I used
echo 200000 > /proc/sys/dev/speed_limit_max
echo 200000 > /proc/sys/dev/speed_limit_min