Re: Re: Per-process I/O accounting in RHEL?

Troels Arvin wrote:
> Another storage related feature which I really miss:
> If the size of a disk is increased (e.g. due to a logical drive size 
> increase in the SAN), the increased capacity should be discovered by the 
> OS (perhaps after running some "check_for_changed_block_devices" 
> command). With RHEL 5 (and probably earlier), I haven't found a way, 
> other than a reboot.

Try partprobe, part of the parted package. Haven't needed this myself 
yet, but AFAICT this is the tool that allows to grow SAN luns on the fly.

> Oh, and: There shoud be a more civilized way to have RHEL re-scan the 
> SCSI devices, instead of echoing special values into various files in 
> the /sys file system.

I have used

http://www.garloff.de/kurt/linux/rescan-scsi-bus.sh

which puts a slightly easier interface around the "tickle files in /sys 
and/or /proc" thing.

--
Janne Blomqvist