Date   : Mon, 01 Oct 2007 16:46:34 +0100
From   : adsb@... (Andrew Benham)
Subject: Acorn SCSI access / serial transfer

Jules Richardson wrote:

> That sounds ideal, then - if I can manually set start/stop params then it 
> should do the job :-)

I believe so.

> Any idea how well it copes with drive defects? I think ordinarily it's the 
> filesystem's responsibility to handle duff sectors and avoid them as necessary 
>   - which means anything doing a raw read will potentially encounter bad 
> sectors and have to cope with them...

I replace any duff sectors with a sector full of '0xdead' 16-bit words, which
I reckon are easy to find afterwards.  I think it warns on the screen too.


> I've looked into that in the past without much luck. The Linux SCSI code's 
> pretty hairy, and also doesn't like talking to things which appear as 
> mass-storage devices but won't respond to the 'identify' command [1]. It seems 
> to offline them within the whole SCSI kernel system at boot time as being 
> broken, even though they'd probably happily respond to raw read commands via 
> 'sg' (which would be good enough for what we want to do). [2]

Somewhere or other I have my old SoundBlaster 16 SCSI 2 card, but this is in
effect an Adaptec 1510 and so is probably no better.

-- 
Andrew Benham           adsb@...       
Southgate, London N14, United Kingdom

The gates in my computer are AND OR and NOT, not "Bill".