Unable to set scheduler to noop
Hello all,
I have a very strange problem, we've got 2 SSD drives here is some info on the system etc:
Code:
OS: Centos 6
2.6.32-71.29.1.el6.x86_64 #1 SMP Mon Jun 27 19:49:27 BST 2011 x86_64 x86_64 x86_64 GNU/Linux
Code:
fdisk /dev/sdb -l
Disk /dev/sdb: 120.0 GB, 120034123776 bytes
255 heads, 63 sectors/track, 14593 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000c2827
Device Boot Start End Blocks Id System
/dev/sdb1 1 13374 107426623+ 83 Linux
when I try doing "echo noop /sys/block/sdb/queue/scheduler"
it doesn't do anything :?
and then I found something interesting in the /var/log/messages :
Code:
Jul 19 09:00:32 173-231-59-66 kernel: sdc: sdc1
Jul 19 09:01:24 173-231-59-66 kernel: EXT4-fs (sdc1): mounted filesystem with ordered data mode
Jul 19 09:07:17 173-231-59-66 kernel: elevator: type noop anticipato not found
Jul 19 09:07:17 173-231-59-66 kernel: elevator: switch to noop anticipatory deadline [cfq]
Any ideas on what the issue is ?
Thank you !
