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From: "Nerijus Baliunas" <nerijus@users.sourceforge.net>
To: "Andre Hedrick" <andre@linux-ide.org>
Cc: <linux-kernel@vger.kernel.org>
Subject: RE: Promise 20267 "working" but no UDMA
Date: Mon, 2 Apr 2001 18:20:38 +0200
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> > PDC20267: (U)DMA Burst Bit ENABLED Primary MASTER Mode Secondary MASTER
Mode.

How does MASTER mode differ from PCI?

I have:
PDC20267: IDE controller on PCI bus 00 dev 50
PDC20267: chipset revision 2
PDC20267: not 100% native mode: will probe irqs later
PDC20267: ROM enabled at 0xe8000000
PDC20267: (U)DMA Burst Bit ENABLED Primary PCI Mode Secondary PCI Mode.

Another question - I have Promise Ultra100 and 2 disks:

hda: QUANTUM FIREBALL CX10.2A, 9787MB w/418kB Cache, CHS=19885/16/63, UDMA(33)
hdc: IBM-DTLA-305030, 29314MB w/380kB Cache, CHS=59560/16/63, UDMA(100)

Why Quantum is shown as UDMA 33 when Promise BIOS shows it as UDMA 66?

Why DMA Mode:       UDMA 4 in /proc/ide/pdc202xx for IBM disk?
Shouldn't it be UDMA 5?

Regards,
Nerijus

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