less than whole lengths

Robert Snively rsnively at Brocade.COM
Wed Mar 13 13:20:54 PST 2002


* From the T10 Reflector (t10 at t10.org), posted by:
* Robert Snively <rsnively at brocade.com>
*
Already done.

See  FC-PLDA, clause 8.2.2

	The DATA_RO parameter in the FCP_XFER_RDY IU on 
	write type operations for disk devices shall
	be a multiple of 8 bytes.

Bob

> -----Original Message-----
> From: Pat LaVarre [mailto:LAVARRE at iomega.com]
> Sent: Thursday, March 07, 2002 5:03 PM
> To: t10 at t10.org
> Subject: less than whole lengths
> 
> 
> * From the T10 Reflector (t10 at t10.org), posted by:
> * "Pat LaVarre" <LAVARRE at iomega.com>
> *
> >  It is just unfortunate (and a historical accident)
> > that standard ... data is ... is not 32-bit aligned.
> 
> A accident nowadays looming larger is that so much standard 
> data is not 64-bit
> (8 byte) aligned e.g. the x24 bytes commonly moved in by the 
> cdb x 12 0 0 0 24
> 0 i.e. Inquiry for up to x24 bytes.
> 
> It will be fun to see if the people who have so successfully 
> resisted moving
> anything but N * 4 bytes will soon try to move nothing but N 
> * 8 bytes.
> 
> Often I've wished there was a way to be a Scsi device yet 
> still insist on
> never moving anything but N * K bytes, where K was my block 
> size, like Ata
> does.
> 
> Pat LaVarre
> 
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