Messages in this thread | | | Date | Sat, 01 Mar 2003 19:54:29 -0500 | From | Nicholas Wourms <> | Subject | Incorrect 80 wire detection with amd 760mpx & 2.4.21-pre4-ac7 |
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FYI: I suspect that: http://marc.theaimsgroup.com/?l=linux-kernel&m=104619727013220&w=2 is related to my problem.
Anyhow, I'm using a UDMA5 WesternDigital drive on a ASUS K7M266-D motherboard. With a plain, stock 2.4.20 kernel, the viper driver properly recognizes which channel has the 80 wire cable (in my case ide0). The hard disk is the primary master, a cd-r drive is the primary slave, and a zip drive is the secondary slave. I can successfully set UDMA5 with hdparm without any problems. However, after upgrading to 2.4.21-pre4-ac7, I noticed that the drive was stuck at UDMA2. Checking /proc/ide/amd74XX yeilds some unexpected results:
----------AMD BusMastering IDE Configuration---------------- Driver Version: 2.9 South Bridge: Advanced Micro Devices [AMD] AMD-768 [Opus] IDE Revision: IDE 0x4 Highest DMA rate: UDMA100 BM-DMA base: 0xd800 PCI clock: 33.3MHz -----------------------Primary IDE-------Secondary IDE------ Prefetch Buffer: yes yes Post Write Buffer: yes yes Enabled: yes yes Simplex only: no no Cable Type: 40w 80w -------------------drive0----drive1----drive2----drive3----- Transfer Mode: UDMA UDMA UDMA PIO Address Setup: 30ns 30ns 30ns 120ns Cmd Active: 90ns 90ns 90ns 90ns Cmd Recovery: 90ns 90ns 30ns 30ns Data Active: 90ns 90ns 90ns 330ns Data Recovery: 30ns 90ns 30ns 270ns Cycle Time: 60ns 60ns 60ns 600ns Transfer Rate: 33.3MB/s 33.3MB/s 33.3MB/s 3.3MB/s
It appears that the driver has got it backwards, identifying my 80 wire cable as a 40 wire cable and visa-versa. As I mentioned, this is completely opposite to the behavior of 2.4.20. I've poked around the source, but I can't come up with anything new to what the other person discovered. Trying to pass ide0=ata66 doesn't seem to have any effect on the situation. I can provide further information upon request, but I don't think it will be necessary at this point.
Cheers, Nicholas
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