Hi Mikael,
thanks for your response.
to 1.) If I stop limiting the harddisk to UDMA3 it will try to speak
every time UDMA4 - this does not work flawless and so there are a lot of
hard resets of the IDE-channel.
Is there another possibility to limit the drive to UDMA3? With
legacy-IDE I did this always with hdparm, but this does not work with
libata. :-/
to 2.) I cannot separate the two devices - the CF-port is soldered onto
the mainboard and is connected to the secodary master, the 2.5" harddisc
has a 44pin connector to the 44pin-connector on the mainbaord. :-/
kind regards, Alois
Mikael Pettersson wrote:
MadLoisae@xxxxxxx writes:
> Hello Jeff, hello linux-ide-team,
>
> I encounter here sometimes a strange problem - I hope you do not bother
> me that I write direct to you.
> I use following hardware: VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus
> Master IDE (rev 06) as PATA-controller (so I use the pata_via module -
> 1106:0571), on the secondary channel as master a Compact Flash card, as
> slave a 2.5" WDC 320GB harddisc. The harddisc is only able to speak
> UDMA3 (caused by the cable), the Compact Flash Card is able to speak
> UDMA4. So I force this values with the kernel command line
> (libata.force=2.00:udma4,2.01:udma3). I am using ext3 on the FlashCard
> and ext4 on the harddisc, splitted in 4 partitions.
> I use linux 2.6.31.4, my config is attached.
> Since 2.6.30 I use libata instead of legacy IDE.
> After a not reproduceable time my machine is not able to handle my
> harddisk any more. There are always the same logs:
>
> [1036724.000131] ata2.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action
> 0x6 frozen
> [1036724.000256] ata2.01: cmd c8/00:08:0b:72:04/00:00:00:00:00/fa tag 0
> dma 4096 in
> [1036724.000262] res 40/00:00:00:78:00/00:00:00:00:00/10 Emask
> 0x4 (timeout)
...
> at this time the only workaround is a reboot - i did not find any way
> yet to reanimate the harddisc in this state.
Two suggestions:
1. don't use libata.force
2. put the CF card and the PATA disk on separate channels with separate cables
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