From: John Richard Moser <nigelenki@comcast.net>
To: linux-kernel@vger.kernel.org
Subject: libata and sata?
Date: Tue, 12 Dec 2006 11:27:38 -0500 [thread overview]
Message-ID: <457ED87A.5@comcast.net> (raw)
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A while back my distro moved to libata for sata_via. I was since
confused; my disk seemed a lot slower, and it looked like DMA was off.
I'm not sure how SATA works; is it even possible to enable/disable
32-bit IO and DMA? Or are those just on?
sata_via 11524 4
libata 112660 3 ata_generic,pata_via,sata_via
~$ sudo hdparm -d1 -c1 -u1 /dev/sda
/dev/sda:
setting 32-bit IO_support flag to 1
HDIO_SET_32BIT failed: Invalid argument
setting unmaskirq to 1 (on)
HDIO_SET_UNMASKINTR failed: Inappropriate ioctl for device
setting using_dma to 1 (on)
HDIO_SET_DMA failed: Inappropriate ioctl for device
IO_support = 0 (default 16-bit)
I no longer have two kernels to test through; I can't tell if the speed
is back or not. Nothing in dmesg tells me if SATA is using DMA or
32-bit IO support though, so I don't know... lack of knowledge over here
is killing me for troubleshooting this on my own.
- --
We will enslave their women, eat their children and rape their
cattle!
-- Bosc, Evil alien overlord from the fifth dimension
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next reply other threads:[~2006-12-12 16:27 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-12 16:27 John Richard Moser [this message]
2006-12-12 17:30 ` libata and sata? Stephen Clark
2006-12-12 17:37 ` Alan
2006-12-19 0:41 ` John Richard Moser
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