[Cbe-oss-dev] [FYI 24/27] ps3: storage driver

[Geert Uytterhoeven]

On Wed, 29 Nov 2006, Arnd Bergmann wrote:
> On Wednesday 29 November 2006 13:41, Geert Uytterhoeven wrote:
> > Are there any disadvantages of using a block driver instead?
> 
> My guess is that inside of the kernel using a separate block driver
> has only advantages. The value in the scsi layer lies mostly in the
> common error handling for all scsi devices, which does not apply here.
> 
> From the user perspective, there is a significant difference between
> using a block driver and a scsi driver, mostly because the device special
> files are named differently. All scsi drives are named sd[a-z] or sr[0-9],
> while a new driver would use a different name space, possibly a common
> one for hard disc and compat disk type media, like we have on IDE.
> 
> Whether you consider this difference a disadvantage or not depends on your
> personal opinion.

I see a different namespace as a disadvantage for the user.
And how would the device numbering be handled, with the moratorium on new
device node numbers? How to handle static device nodes (without udev)?

I also thought the current trend was to move _to_ the SCSI layer, cfr. USB
storage and libata.

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- Sony Network and Software Technology Center Europe (NSCE)
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