Re: [PATCH 1/2] Use sdev_scsi2lun for SCSI parallel drivers

Hannes Reinecke
2014-07-07T05:47:44Z

On 07/04/2014 09:44 PM, Douglas Gilbert wrote:
> On 14-07-04 07:54 AM, Hannes Reinecke wrote:
>> SCSI-2 defines only up to 256 LUNs with a flat namespace.
>
> My SCSI-2 draft (revision 10b from August 1989) only has
> 3 bit LUNs placed in byte 1 of the command block, in the top
> 3 bits. There are also things called LUNTARs and LUNTRNs
> at the message level.
>
> 8 bit LUNs do ring a distant bell, perhaps after SCSI-2?
>
Yeah, you're right. SCSI-2 defines a 3-byte LUN; starting with SCSI-3 it
went to 64bit.

I'll be renaming them to 'sdev_lun8'.

Cheers,

Hannes
--
Dr. Hannes Reinecke zSeries & Storage
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