Re: Multiplexed RAID-1 mode

2005-08-01 Thread Jeff Breidenbach
Hi Neil, Are you suggesting I do this? mdadm --create /dev/md0 --level=10 --raid-devices=2 \ --parity=f2 /dev/sdc1 /dev/sdd1 I just tried it and it appears dog slow - for example hdparm -t /dev/md0 claims 18MB/s, and I see a similar number in /proc/mdstat for resync speed.

RE: Multiplexed RAID-1 mode

2005-08-01 Thread Al Boldi
Neil Brown wrote: { On Sunday July 31, [EMAIL PROTECTED] wrote: Multiplexing read/write requests would certainly improve performance ala RAID-0 (-offset overhead). During reads the same RAID-0 code (+mirroring offset) could be used. During writes though, this would imply delayed mirroring.

Re: One disk busy in RAID5?

2005-08-01 Thread Forrest Taylor
On Sun, 2005-07-31 at 00:33, Neil Brown wrote: On Saturday July 30, [EMAIL PROTECTED] wrote: I'm doing a big rsync to my 5 disk RAID 5 partition and am seeing an uneven loading of my disks. The files are almost all huge video files. Has anyone got any idea what I could have done wrong?