From: "Josh Straub" <tookycat@nconnect.net>
To: <linux-kernel@vger.kernel.org>
Cc: <andre@linux-ide.org>
Subject: IDE HD DMA not being enabled in 2.4.0
Date: Sun, 7 Jan 2001 21:28:50 -0600 [thread overview]
Message-ID: <003701c07923$1e642630$0101010a@jstraub128nt> (raw)
Hello, this is my first post to Linux-Kernel so I hope I get this right.
On my Pentium 200 system with Intel i430VX chipset and PIIX3, my Maxtor
3.5GB IDE HD would always have DMA enabled even in 2.4.0-test10, but then
sometime between 2.4.0-test12 and 2.4.0 (final), DMA was not being enabled
anymore upon boot.
Here is my relevant "dmesg" from 2.4.0-test10:
Uniform Multi-Platform E-IDE driver Revision: 6.31
ide: Assuming 33MHz system bus speed for PIO modes; override with
idebus=xx
PIIX3: IDE controller on PCI bus 00 dev 39
PIIX3: chipset revision 0
PIIX3: not 100% native mode: will probe irqs later
ide0: BM-DMA at 0xf000-0xf007, BIOS settings: hda:pio, hdb:pio
ide1: BM-DMA at 0xf008-0xf00f, BIOS settings: hdc:pio, hdd:pio
hda: Maxtor 83500A4, ATA DISK drive
hdb: ST31220A, ATA DISK drive
hdc: ATAPI CDROM, ATAPI CDROM drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
ide1 at 0x170-0x177,0x376 on irq 15
hda: 6839440 sectors (3502 MB) w/256KiB Cache, CHS=848/128/63, (U)DMA
hdb: 2116296 sectors (1084 MB) w/256KiB Cache, CHS=524/64/63, DMA
Notice the drive being picked up as (U)DMA, and the Seagate 1.2GB being
picked up as DMA.
Now look at my 2.4.0 dmesg:
Uniform Multi-Platform E-IDE driver Revision: 6.31
ide: Assuming 33MHz system bus speed for PIO modes; override with
idebus=xx
PIIX3: IDE controller on PCI bus 00 dev 39
PIIX3: chipset revision 0
PIIX3: not 100% native mode: will probe irqs later
ide0: BM-DMA at 0xf000-0xf007, BIOS settings: hda:pio, hdb:pio
ide1: BM-DMA at 0xf008-0xf00f, BIOS settings: hdc:pio, hdd:pio
hda: Maxtor 83500A4, ATA DISK drive
hdb: ST31220A, ATA DISK drive
hdc: ATAPI CDROM, ATAPI CDROM drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
ide1 at 0x170-0x177,0x376 on irq 15
hda: 6839440 sectors (3502 MB) w/256KiB Cache, CHS=848/128/63
hdb: 2116296 sectors (1084 MB) w/256KiB Cache, CHS=524/64/63, DMA
Here you can see that DMA is still configured, because the Seagate retains
DMA. But for some reason the Maxtor is now getting no DMA at all. I can
use "hdparm" to enable it manually and I did an "updatedb" to generate some
heavy test disk activity, and it worked fine. So I cannot assume that DMA
is being disabled on my Maxtor on purpose, because of some bad hardware or
something, and I am guessing something changed in the IDE driver recently
that buggered the DMA enabling.
Please CC all correspondence to my email, since I don't subscribe to
Linux-Kernel. Thanks!
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Josh Straub ô¿ô tookycat@nconnect.net
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reply other threads:[~2001-01-08 3:29 UTC|newest]
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