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SubjectRe: slow latencies on IDE disk drives( controller? )

#define PCI_VENDOR_ID_CONTAQ 0x1080
#define PCI_DEVICE_ID_CONTAQ_82C599 0x0600
#define PCI_DEVICE_ID_CONTAQ_82C693 0xc693

* linux/drivers/block/cy82c693.c Version 0.34 Dec. 13, 1999
* Copyright (C) 1998-99 Andreas S. Krebs (, Maintainer
* Copyright (C) 1998-99 Andre Hedrick, Integrater

* Notes:
* - I recently got a 16.8G IBM DTTA, so I was able to test it with
* a large and fast disk - the results look great, so I'd say the
* driver is working fine :-)
* hdparm -t reports 8.17 MB/sec at about 6% CPU usage for the DTTA
* - this is my first linux driver, so there's probably a lot of room
* for optimizations and bug fixing, so feel free to do it.
* - use idebus=xx parameter to set PCI bus speed - needed to calc
* timings for PIO modes (default will be 40)
* - if using PIO mode it's a good idea to set the PIO mode and
* 32-bit I/O support (if possible), e.g. hdparm -p2 -c1 /dev/hda
* - I had some problems with my IBM DHEA with PIO modes < 2
* (lost interrupts) ?????
* - first tests with DMA look okay, they seem to work, but there is a
* problem with sound - the BusMaster IDE TimeOut should fixed this

This is your fix....

Andre Hedrick
Linux ATA Development
ASL Kernel Development
ASL, Inc. Toll free: 1-877-ASL-3535
1757 Houret Court Fax: 1-408-941-2071
Milpitas, CA 95035 Web:

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