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Date: Thu, 03 Jan 2008 18:54:21 +0100
From: "Holger Hoffstaette" <holger@...ards.de>
To: linux-kernel@...r.kernel.org
Cc: linux-ide@...r.kernel.org
Subject: Re: SATA kernel-buffered read VERY slow (not raid, Promise TX300 card); 2.6.23.1(vanilla)
I got my Promise card and everything is up and running without problems,
using kernel 2.6.24-rc6 and the sata_promise driver out of the box:
00:0c.0 Mass storage controller: Promise Technology, Inc. PDC40775 (SATA 300 TX2plus) (rev 02)
Subsystem: Promise Technology, Inc. PDC40775 (SATA 300 TX2plus)
Flags: bus master, 66MHz, medium devsel, latency 72, IRQ 17
I/O ports at b400 [size=128]
I/O ports at b800 [size=256]
Memory at ef025000 (32-bit, non-prefetchable) [size=4K]
Memory at ef000000 (32-bit, non-prefetchable) [size=128K]
[virtual] Expansion ROM at 98020000 [disabled] [size=32K]
Capabilities: [60] Power Management version 2
Kernel driver in use: sata_promise
Drive is a Samsung HD321KJ 320 GB and hdparm says the drive does ~75
MB/s; with dd it does buffered writes at ~85 MB/s and reads ~295 MB/s. So
all in all I'd say it's not the card or the driver..
hth,
Holger
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