[Eug-lug] Slow RAID0

[Linux Rocks!]

I did that... before I got the raid setup, I tested the drives individually. 
they came up about 45/MB/s each, raided they come up about 50 MB/s. 
on the primary ide controller (onboard) I have the 160 gb disk), it does about 
56-58 MB/s as a single drive.

I have a dvdr on the secondary controller, its suppose to be ata100. my 
primary is supposed to be ata133, but hdparm shows it as udma5, while the 200 
gb disks show udma6. 
I was thinking of trying to put the raid drives as master/slave on the 
secondary controller, and test the performance... its probably better than 
the current setup.

Jamie

On Saturday 15 January 2005 02:07 pm, Mr O wrote:
: Run hdparm on /dev/hde and /dev/hdg seperately and make sure
: each drive is set up right. Then bench /dev/md0 again if you
: make any changes. Could be the cheap controller too.
:
: --- Linux Rocks! <linux at rocksolidnetworks.com> wrote:
: > heres the hdparm info:
: > root at media:~# hdparm -Tt /dev/hda
: >
: > /dev/hda:
: >  Timing buffer-cache reads:   2928 MB in  2.00 seconds =
: > 1463.49 MB/sec
: >  Timing buffered disk reads:  170 MB in  3.01 seconds =  56.41
: > MB/sec
: >
: >
: > /dev/md0:
: >  Timing buffer-cache reads:   3288 MB in  2.00 seconds =
: > 1643.43 MB/sec
: >  Timing buffered disk reads:  150 MB in  3.01 seconds =  49.91
: > MB/sec
: >
: >
: > So, at this point, It looks like my raid is sucking. Id get
: > better performance
: > as regular single drives than I am with this raid setup.
: >
: > any ideas on how I can get this working right?
: > Jamie
:
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