[illumos-Developer] Changing sd_io_time to 8?

[Dmitry Yusupov]

> -----Original Message-----
> From: Deano [mailto:deano at rattie.demon.co.uk]
> Sent: Tuesday, May 03, 2011 8:36 AM
> To: 'Garrett D'Amore'; 'Joerg Schilling'
> Cc: developer at lists.illumos.org
> Subject: Re: [illumos-Developer] Changing sd_io_time to 8?
> 
> > Yes, but the SCSI commands and the support logic you need for cdroms
> > are quite different from what you need for disks, even though there is
> > a large area of overlap.  There's a reason that these are specified by
> > different parts of the SCSI standards. :-)
> >
> >	- Garrett
> 
> 
> I agree with Garrett, the sd driver has to deal with
> 
> SCSI drives
> SCSI removable
> SAS
> ATA
> SATA
> ATAPI
> (and I expect a few more I've forgotten)
> 
> It’s a bit nasty for one driver to have to deal with that lot, given the number
> of sub-standards and appendums (and bugs!) each protocol has generated
> over the years.

I wonder if we enhance blkdev driver with SCSI handling, can we clean this up over time?