On 14 May 2015 09:41:07 +1000 Christopher Samuel wrote:
On 14/05/15 08:57, mathog wrote:
[...]
cat /sys/block/dm*/queue/scheduler
none
none
[...]
How is it possible to mount a volume, Raid or no, with no scheduler???
I think you're looking in the wrong place; you need to look at the sys
files for the disk (sda, sdb, or variations if your RAID controller
registers them differently) rather than the Device Mapper (DM) entries.
They don't have IO schedulers associated with them.
Hmm...
Ah, I see the mix up. There is a "/dev/sda" entry in /etc/fstab for an
ntfs
volume, but /etc/mtab shows
/dev/sda1 /boot ext4 rw 0 0
and fdisk run on /dev/sda lists it as a single 8 Tb disk. So sda is the
raid after all. sda is using cfq scheduling.
As for swap, could it be someone built it with a kickstart that defined
it that way?
Pretty sure he just put in the Centos install DVD and let it default for
most things, most likely including swap.
Thanks,
David Mathog
[email protected]
Manager, Sequence Analysis Facility, Biology Division, Caltech
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