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SubjectCD-ROM and HDD problems with the VIA chipset driver, MB Asus A7M266
Hello!

I'm having some problems using the following setup:

SCSI emulation on my CD-rom's (SCSI emulation, SCSI support, SCSI cdrom
support and SCSI generic driver)
The CD-rom's are (on ide1):
PLEXTOR CD-R PX-W1610A (master)
CREATIVE DVD-ROM DVD6240E (slave)
I also have two hdd's (on ide0):
IBM DeskStar 60GXP 40GB (master)
Seagate ST315320A (slave)

My motherboard is the Asus A7M266 (with the Via VT82C686B south-bridge)

The kernel is 2.4.2

Now, if I don't include via chipset support, my hdd's run at ATA100
(IBM) and ATA66 (Seagate).
If i include the via chipset, they both run at ATA33, which I can't change.

When not using the via chipset support, my Plextor drive won't mount
cd's (the creative cd-rom works fine in both modes) though it still
burns fine.

/var/log/messages include:
ide-scsi: The scsi wants to send us more data than expected -
discarding data
68 times

and right after:
can't determine CD-Format.

when i try to mount



If I include the via chipset support, the cd mounts with Plextor, but
the hdd's (as already stated) runs slower (about 10MB/s)

Also, the information in /proc/ide/via:
----------VIA BusMastering IDE Configuration----------------
Driver Version: 3.20
South Bridge: VIA vt82c686b
Revision: ISA 0x40 IDE 0x6
BM-DMA base: 0xd800
PCI clock: 33MHz
Master Read Cycle IRDY: 0ws
Master Write Cycle IRDY: 0ws
BM IDE Status Register Read Retry: yes
Max DRDY Pulse Width: No limit
-----------------------Primary IDE-------Secondary IDE------
Read DMA FIFO flush: yes yes
End Sector FIFO flush: no no
Prefetch Buffer: yes no
Post Write Buffer: yes no
Enabled: yes yes
Simplex only: no no
Cable Type: 40w 40w
-------------------drive0----drive1----drive2----drive3-----
Transfer Mode: UDMA UDMA UDMA UDMA
Address Setup: 30ns 30ns 30ns 30ns
Cmd Active: 90ns 90ns 90ns 90ns
Cmd Recovery: 30ns 30ns 30ns 30ns
Data Active: 90ns 90ns 90ns 90ns
Data Recovery: 30ns 30ns 30ns 30ns
Cycle Time: 60ns 60ns 90ns 90ns
Transfer Rate: 33.3MB/s 33.3MB/s 22.2MB/s 22.2MB/s

Dosen't fit with the cables I use - they are both 80 pins (and the BIOS
acknowledges this)

hdparm -i /dev/hd[ab] (when using the via chipset support):
/dev/hda:

Model=IC35L040AVER07-0, FwRev=ER4OA44A, SerialNo=SXPTX0K2690
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=40
BuffType=DualPortCache, BuffSize=1916kB, MaxMultSect=16, MultSect=16
CurCHS=16383/16/63, CurSects=-66060037, LBA=yes, LBAsects=80418240
IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio1 pio2 pio3 pio4
DMA modes: mdma0 mdma1 mdma2 udma0 udma1 *udma2 udma3 udma4 udma5

/dev/hdb:

Model=ST315320A, FwRev=3.12, SerialNo=3CW035CJ
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=0
BuffType=unknown, BuffSize=2048kB, MaxMultSect=16, MultSect=16
CurCHS=16383/16/63, CurSects=-66060037, LBA=yes, LBAsects=29888820
IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio1 pio2 pio3 pio4
DMA modes: mdma0 mdma1 mdma2 udma0 udma1 *udma2 udma3 udma4

I tried using the via kernel parameter to hardcode the UDMA
transfer-rates but nothing happend.

(I'm not subscribed to this list, so if anybody answers would they
please CC the reply to me)
Kind regards Jack Jørgensen.

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