> Subject: Promise UltraDMA/66, cannot enable Busmaster DMA > Date: Mon, 13 Mar 2000 00:51:34 +0800 > From: [EMAIL PROTECTED] (Red Hat Partisan) > To: [EMAIL PROTECTED] > CC: [EMAIL PROTECTED] > > Hello, I have another (probably stupid) problem. A server is running > a Micronics M6Me mainboard with integrated SCSI. I want to add extra > drive(s) into a RAID0 of aging Seagate Elite 9GB `bricks', and thought > that I might make do with a 7200rpm Fujitsu MPE (13GB UDMA-66) as the > third drive in the RAID, perhaps in a RAID-4. It is only after being > all done with the backing-up, re-set-up, and so on that I realised the > unfortunate fact that the M6Me, like earlier server boards such as the > SuperMicro P6DOF, has its IDE drives connected to the ISA bus -- good > for maybe 1.5 MB/s in PIO mode, no DMA. No problem, said I, I have a > Promise PCI UDMA66 controller lying around. In it went and I was able > to find and set up with my Fujitsu as /dev/hde on the ide2 interface. > But OUCH!! when I try to do enable DMA, I get this: You'll need Hedrick's unified ide patches for your kernel. The Promise controller works great with 7200rpm drives (I'm getting near SCSI performance from our boxes, at much lower prices...just eats a little extra CPU over what SCSI does). Go here to get them: ftp://ftp.kernel.org/pub/linux/kernel/people/hedrick/ Pick the latest ide patches for your kernel. You may have to go to the old subdir to find one for your kernel if you use a stock RH kernel. Promise has been well supported for about 6 months now, I think...so even older patches should be OK (though if it were me, I'd go ahead and get the latest 2.2.15pre14 kernel, since you're going to be recompiling anyway...). I've got quite a bit of experience with this controller, so if you have any problems feel free to mail me. -- Joe Cooper <[EMAIL PROTECTED]> http://www.swelltech.com -- To unsubscribe: mail [EMAIL PROTECTED] with "unsubscribe" as the Subject.
