[Bug 200337] Re: CD/DVD burning problem in hardy SOLVED --- BURN AT 2X

[Tom]

all_generic_ide worked for me and I think I know why.  It is DMA/66 80
pin tape issue. Without all_generic_ide option, on my PC, kernel uses
pata_via driver. My recorder can work in UDMA/66 mode and pata_via
driver sets this mode for it. But my dvdrecorder is connected to
mainbord by old 40 pin tape and it leads to transmission errors between
mainboard and recorder. all_generic_ide kernel option turns on
ata_generic driver and this driver set UDMA/33 mode for recoder which is
best possible one because of tape limitation. I suspect that it is
possible to discover tape kind (40 or 80 pin) on driver level and
ata_generic driver makes it better then pata_via driver.

This is part of dmesg log without all_generic_ide kernel option:
[   34.026040] scsi0 : pata_via
[   34.027306] scsi1 : pata_via
[   34.029150] ata1: PATA max UDMA/133 cmd 0x1f0 ctl 0x3f6 bmdma 0xfc00 irq 14
[   34.029154] ata2: PATA max UDMA/133 cmd 0x170 ctl 0x376 bmdma 0xfc08 irq 15
[   34.200604] ata1.00: ATA-7: Maxtor 6B160P0, BAH41B70, max UDMA/133
[   34.200610] ata1.00: 320173056 sectors, multi 16: LBA48 
[   34.210922] ata1.01: HPA unlocked: 156250000 -> 156301488, native 156301488
[   34.210932] ata1.01: ATA-5: WDC WD800BB-75CAA0, 16.06V16, max UDMA/100
[   34.210936] ata1.01: 156301488 sectors, multi 16: LBA 
[   34.228375] ata1.00: configured for UDMA/133
[   34.243861] ata1.01: configured for UDMA/100
[   34.562591] ata2.00: ATAPI: Optiarc DVD RW AD-7173A, 1-01, max UDMA/66
[   34.734281] ata2.00: configured for UDMA/66 <--------------

and this is the same part of dmes log with all_generic_ide option

[   26.430082] scsi0 : ata_generic
[   26.430171] scsi1 : ata_generic
[   26.432019] ata1: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0xfc00 irq 14
[   26.432023] ata2: PATA max UDMA/100 cmd 0x170 ctl 0x376 bmdma 0xfc08 irq 15
[   26.605110] ata1.00: ATA-7: Maxtor 6B160P0, BAH41B70, max UDMA/133
[   26.605115] ata1.00: 320173056 sectors, multi 16: LBA48 
[   26.615511] ata1.01: HPA unlocked: 156250000 -> 156301488, native 156301488
[   26.615516] ata1.01: ATA-5: WDC WD800BB-75CAA0, 16.06V16, max UDMA/100
[   26.615520] ata1.01: 156301488 sectors, multi 16: LBA 
[   26.615534] ata1.00: configured for UDMA/133
[   26.615536] ata1.01: configured for UDMA/100
[   26.935225] ata2.00: ATAPI: Optiarc DVD RW AD-7173A, 1-01, max UDMA/66
[   26.935238] ata2.00: configured for UDMA/33 <--------------

The best workaround for this issue would to be to force somehow pata_via
driver to set UDMA/33 mode for recorder or just to buy new 80 pin tape
:)

-- 
CD/DVD burning problem in hardy SOLVED --- BURN AT 2X
https://bugs.launchpad.net/bugs/200337
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