[Fwd: extended translation in aic7xxx driver.]

[Kevin Chu]

This was posted in linux-scsi at vger.rutgers.edu, and it's not getting
any replies.  What do the people on this list think?

Kevin

Tomasz Motylewski wrote:

> The recent update of aic7xxx in 2.0.36 kernel (pre13-pre14 transition) made
> "extended translation ENABLED" the default setting, independed of the BIOS
> setting (which was the default before). It breaks fdisk and LILO on SCSI
> disks formatted with extended translation disabled (see examples on
> http://crds.chemie.unibas.ch/machine/2.0.36pre19/ )
> 
> I would like to ask if there is any way of switching off extended translation
> in Adaptec AIC7xxx driver version  5.1.3/3.2.4 ? If the source code
> modification is the only way, what would be the first place to add it?
> 
> How hard would it be to make aic7xxx driver to read default value of this
> parameter from BIOS again ?
> 
> Please CC any replies to motyl at stan.chemie.unibas.ch
> 
> Regards,
> --
> Tomasz Motylewski
> 
> P.S. To test:  boot new kernel, run fdisk on your SCSI disk, display
> partition table. If you had used extended translation before, you won :-)

===========================================================

> Tomasz Motylewski wrote:
> 
> > The recent update of aic7xxx in 2.0.36 kernel (pre13-pre14 transition) made
> > "extended translation ENABLED" the default setting, independed of the BIOS
> > setting (which was the default before). It breaks fdisk and LILO on SCSI
> > disks formatted with extended translation disabled (see examples on
> > http://crds.chemie.unibas.ch/machine/2.0.36pre19/ )
> 
> According to the big disk howto
> (http://sunsite.unc.edu/LDP/HOWTO/mini/Large-Disk-6.html#ss6.2) the
> only reason to have extended translation is if you're running DOS, and
> it recommends avoiding extended translation altogether.
> 
> I'm still running 2.0.35, but if extended translation cannot be turned
> off in 2.0.36, then it will be broken for me, because I don't use
> extended translation (even though I have Win95 on one of my disks).
> 
> Kevin

-- 
Kevin Chu               kevin at portal.ca

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