Forgot to mention, the drives are WD 500 GB "Raid enabled" SATA drives. They are some of WD newer drives, and I think they are techincally SATA2. The other system also has the same drives. On 6/13/07, Matthew Gillen <me@mattgillen.net> wrote:
Leonard Smith wrote: > I am running CentOS4.4 on two "black" box systems that are > identically configured. Both have 500 GB internal drives, ( same type) > and were installed using the same kickstart configuration. The drives > are being mirrored using LVM. > > When I check the first system it is re-syncing and the resync time and > speed are > > finish=18559.6min speed=355K/sec > > On the second system the time and speed are > > finish=89.5min speed=68170K/sec > > I can't figure out why the speeds are different between the two. I > checked /proc/sys/dev/raid/speed_limit_ and they are the same. The > priority of the md proceses are they same. > > I tweaked the setting of the speel_limit_min and increase the nice > priority of the resync process, on the first box, but I could never > get it better than > > finish=4551.8min speed=1445K/sec > > > I've googled and I haven't found much more useful information that to > adjust those settings. Besides those setting what else dictates the > speed used? You might compare the hd settings using 'hdparm'. I'm not sure factor of 100+ can be explained by an incorrect DMA setting or something like that, but it might be a contributor. Matt _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
_______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
