Each time you re-boot. It's not a fix. It's just changing a default. If your system ran too slow during a re-build, you would want to lower the number. As I understand it, this limits the data rate to each disk. Since you had 2 disks, you were getting 20000K per second of disk i/o. It would be nice if /proc/mdstat would display the current min and max speed limits. It would also be nice if there was a place you could set them just once. Maybe /etc/raidtab. Maybe a new file /etc/md.conf. I would prefer to have an overall throughput speed limit, and a per array group speed limit. The overall throughput speed limit would not be per disk, but total disk i/o. Guy -----Original Message----- From: James R Bamford [mailto:jim@jimtreats.com] Sent: Wednesday, November 19, 2003 8:57 AM To: Guy; 'James R Bamford'; linux-raid@vger.kernel.org Subject: RE: Is my raid setup speed ok?! > -----Original Message----- > From: Guy [mailto:bugzilla@watkins-home.com] > Sent: 19 November 2003 04:10 > To: 'James R Bamford'; linux-raid@vger.kernel.org > Subject: RE: Is my raid setup speed ok?! > > > It may be too late for this re-sync, but in the future do this: > echo 100000 > /proc/sys/dev/raid/speed_limit_max > > The default speed limit is 10000, that's what you are getting. > So you have reached a software imposed limit, not a hardware limit. > > Thanks.. I wondered about this.. it could really do with being added into the HOWTO.. Is this fix a do once.. fix everytime.. or something that i have to do each time i plan to rebuild an array.. (isn't proc deleted every boot!? so someone has asked me...) Thanks tho Jim - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
