Re: A modern RAID solution?

[Luben Tuikov <luben@splentec.com>]

Steven Dake wrote:
> 
> multiple commands at once.  RAID 5 will see improvement because the I/O
> processors have special hardware to do 8 or 16 parallel XOR
> calculations.  Also generally I/O processors on the RAID cards run at

I've long been thinking for a software RAID 5 which uses
the REGENERATE/XD*/XP* SCSI Block device commands.

For this reason I thought it useful for an application
client to know if the command made it to the medium as
I posted sometime ago (e.g. when SCSI core requests
through eh_abort_handler()).

-- 
Luben


P.S. (I.e. with the current queuing models for some transports
(and some of my drivers) it is possible to say that:
the cancelled command made it / didn't make it to the
medum (trivial) or that it is unknown whether it made
it to the medium (only in this case we have to re-request
to check).)