Bohmer, Andre ten wrote:
> Hi,
>
> An older Proliant DL-145 server is installed using Linux software raid
> on a 40 (primary) and 80 gb disk (secondary). Strange and not an
> efficient setup, so we want to re-place the 40 GB disk with an 80 GB
> disk and also resize one partition to use the full 80 GB. After some
> googling and faq reading, this seems to be an option :
>
> - make sure grub is also setup on the old 80 gb disk
> - remove the 40 gb disk from the array with raidsetfaulty and
> raidhotremove
> - shutdown the system and replace the 40 gb disk with the new 80 gb disk
> - boot from CD and repartition the old 80 gb disk
> - boot the system from the old 80 gb disk
> - safe partition layout to file : sfdisk -d /dev/hdb > partitions.file
> - partition new 80 gb disk : sfdisk /dev/hda < partitions.file
> - add new 80 gb disks partition to the raidset
>
> We have a backup so the removed partition can be restored ;)
>
> Any ideas or comment is welcome!

It's a long time since I fiddled with software RAID, but I do recall
trying to replace one 80 Gbyte drive with another.

The replacement was a few sectors short, and so unsuitable.

Longer is fine, until the other fails:-)

_I_ would contemplate replacing the pair; if they're three years old
then they're three years closer to expiring, and if further argument is
required I would prefer to be able to schedule time to do the deed at a
convenient time rather than when the end-of-year reports are due at the
system's gone belly up.

Replacing the pair also gives you complete freedom wrt _how_ you do the
deed; something mundane such as "tar cvC /oldsys . | tarxpC /newsys"
works nicely, and one can adjust partition sizes if needed.



--

Cheers
John

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