sata pci cards in ultra 60 or blade 1000 (Update)
marius at alchemy.franken.de
Wed Sep 9 18:45:06 UTC 2009
On Tue, Sep 08, 2009 at 07:30:53PM -0500, R J wrote:
> I would like to say that thanks for fixing the ata-marvell driver for the
> SuperMicro Sata card on sparc64, atleast the blade 1000. Your patch has
> enabled the card to detect the disk drive and complete booting. Not only
> that, I was able to go all the way and create a new partition on the disk,
> newfs it, and mount it. I was able to copy 1.6gigs of data onto the
> partition, and was able to copy data from the partition to another
> directory within the same partition at a tune of about 40MB/s.
> Before that patch, the system was not able to complete booting.
> Out of curiosity, ofcourse, what does the patch do? Does it basically
> disable 64-bit and dma for the driver on sparc64?
It does no such things, it just fixes some sloppy programming
(see my last email for a description of the problems) which
caused the driver to only have a chance of working on x86 but
AFAICT not on any of the other architectures supported by
> This is a PCI-X 133mhz
> card. It would be a dream to get half the band-width as it is in a 66mhz
> pci slot.
> Thanks, Robert.
> Here's a brief output from stock iostat: note the numbers for ad0.
I admit that I have no experience with "benchmarking" disk
I/O with iostat(8), however checking with my machines
suggests that 40MB/s actually is an excellent result for
copying data from a disk to itself, I don't get anywhere
near that rate, not even on x86 with SATA300 gear.
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