Fibre controlled raid (mediavault 4210)

Hi All,

Thanks to all for the help with tracking down playback options. I was
hoping to wait until
I had everything working to post and detail my solution, but I'm stuck.

While the playback software side is sorted using djv I'm having issues
getting the correct
performance out of our mediavault 4210 which is hooked up with a Celerity fibre
controller. Running the 2.6.20 kernel.

I setup the two channels of the fibre controller using lvm2 software
raid as follows:

pvcreate /dev/sdb
pvcreate /dev/sdc
vgcreate hugeraid /dev/sdb /dev/sdc
vgdisplay
lvcreate -i2 -I4 -L2.27TB -nhuge hugeraid
mkfs -t xfs /dev/hugeraid/huge

The write performance is over 400MB/sec as expected, but read is only 120MB/sec.
Unfortunately support is unfamiliar with linux so they've been unable
to resolve it.

The read performance is pretty much identical when I just work on a
single channel, but
write slows down as expected.

I'd be grateful for any assistance.

Cheers,

Alan.

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