Re: [PATCH] Don't use UDMA on VIA UDMA33 controller with Transcend SSD

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> The device ID string is: TS64GSSD25-M, serial 002328450083, revision V0826
> The south bridge is VIA VT82C586B
> 
> The lockup happens on partition scan, sometimes the scan passes and it 
> locks up when loading init. It doesn't get further.

The Linux driver doesn't set all the time setup strictly but it does set
it to be a safer maximum value. That might be worth checking but it would
still be a device naughty if so.

> The lockup is not dependent on IDE driver. I experienced it with Linux 2.6 
> IDE, Linux 2.6 LIBATA, Daniela's OS/2 DANIS506 driver (Daniela, if you 
> maintain a blacklist, you can add it there too) - switching to MWDMA 
> helped. Linux 2.2 locked up too (it doesn't set transfer mode and relies 
> on BIOS) and disabling UDMA in BIOS cured the problem.

> I tested it in a motherboard with VIA133 IDE and it works there. I think 
> it also worked with that VT6421 card, but I can't test it now because I 
> moved root to that Transcend SSD and it wouldn't boot of that.

Thanks - so basically its a specific card/device combination (or a dud
device you own), that makes it easier as any blacklisting can be very
much narrower.

> 1106 8598 0000 0000 06 04 00 00
>         Bridge - PCI bridge - Normal decode
>         VIA Technologies, Inc. - VT82C598/694x [Apollo MVP3/Pro133x AGP]

Ok so its also a dinosaur which might explain the lack of other reports.


Thanks

Alan
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