Re: about SCSI drivers

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On Wed, Jul 15, 2009 at 2:23 PM, Leena M.<kernmonk@xxxxxxxxx> wrote:
> Hi All ,
>          I want to learn to write SCSI drivers. What are the minimum h/w
> requirements ? How costly is the SCSI - PCI adapter ( in India ) ?
>
> regards,
> Leena
>

The SCSI stack is extremely complex.  Have you written other drivers?
Scsi is not a good place to start your kernel experience.

Anyway, within the scsi stack you have:

scsi parallel
sas (serial attached scsi)
usb (transports scsi commands if you did not know.  Then a SAT chip
converts it to ATA typically.)
iScsi (no hardware needed, so this might be a good place to start experimenting)
FCoE (Requires a FC switch, so this is expensive)
and even libata (for sata drivers) is currently a scsi subsystem

And I'm sure I missed a few.

I assume you are interested in writing a scsi parallel driver?  That
is dying technology I believe.  The future is SAS, but parallel might
be a good starting point.  I really don't know how I would go about
learning the scsi stack.

Greg
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