On Thu, 10 Jul 2003 11:18, axacheng wrote: > Hello lists : > > Does anyone knows , How to monitor Software RAID disk I/O ???? > > i have a Software RAID5 device named "/dev/md0" , i've tried to use > "iostat" to monitor /dev/md0 I/O status ...
/proc/partitions does not have any counts for software RAID, so you can't monitor the RAID itself. It does have counts for the block devices that comprise a software RAID so it would not be THAT difficult to write an iostat type program that can read /proc/mdstat to determine which devices comprise a software RAID and then monitors their stats in /proc/partitions and uses some addition to determine the total for the software RAID device. The CPU overhead of incrementing counters is negligible, there's no reason why the counts for software RAID could not be displayed in /proc/partitions, I think that this is a minor bug in the software RAID code. If someone posts a patch to fix it to the linux-kernel list then it should have some chance of being accepted. -- http://www.coker.com.au/selinux/ My NSA Security Enhanced Linux packages http://www.coker.com.au/bonnie++/ Bonnie++ hard drive benchmark http://www.coker.com.au/postal/ Postal SMTP/POP benchmark http://www.coker.com.au/~russell/ My home page -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
