Fredrik Widlund wrote:
Ivan Voras wrote:
Several:
- are there cache differences between the controllers (amount of
memory, cache policy)?
Default settings on both.
Maybe you should check what the defaults are :) Especially the amount of
memory and is there a battery to back the cache.
- how does writing directly to the device (bypassing file system)
compare?
Drives are four seagate 7200.10 400GB in a Raid-5 configuration.
[/mnt/test (/dev/mfid0p1 mounted)]
read: 200MB/s
write: 15MB/s
[/dev/mfid0p1]
read: 200MB/s
write: 8MB/s
[/dev/mfid0]
read: 200MB/s
write: 10MB/s
This is bad :( The difference between p0 and raw device might indicate a
stripe size misalignment, but the values are too low in any case.
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