Abysmal mly Extreme RAID performance in 5.0-p7?

[Jaye Mathisen]

Have a p2-450 with a mylex 3000 fibre channel RAID card.

Configured a few different kind of arrays on it, 

however, the one I'm interested in right now 
is this one:

da1 at mly0 bus 3 target 1 lun 0
da1: <RAID 0 online > Fixed Direct Access SCSI-3 device 
da1: 135.168MB/s transfers
da1: 274656MB (562495488 512 byte sectors: 255H 63S/T 35013C)

It's 16 10kRPM seagates striped in a RAID0.

This is the best # I've gotten so far with this
controller combo.

206438400 bytes transferred in 27.405360 secs (7532775 bytes/sec)


mly0: <Mylex eXtremeRAID 3000> port 0xc800-0xc87f mem 0xd8000000-0xdfffffff,0xd4000000-0xd5ffffff irq 12 at device 8.0 on pci2
mly0: controller initialisation started
mly0: eXtremeRAID 3000, 3 channels, firmware 7.00-3-00 (20011219), 128MB RAM
da0 at mly0 bus 3 target 0 lun 0
da1 at mly0 bus 3 target 1 lun 0
da2 at mly0 bus 3 target 2 lun 0

Interestingly enougn, I haven't tried any plain SCSI disks on a 5.0
box, but I notice the lack of a "tagged" scsi device entry anywhere for
those disks...

So I"m thinking the no TAGGED QUEUEING or whatever it used to be under 4.x
might be related to the issue...


The arrays were all initialized in the BIOS, and the drives were idle before
starting the test.  No background stuff going on.

ANy tips appreciated.