On 03/28/2014 05:47 AM, Christoph Hellwig wrote:
On Fri, Mar 28, 2014 at 01:22:15AM -0700, Hannes Reinecke wrote:
Because there is no guarantee that pre-SCSI-3 devices (or devices
announcing to be pre-SCSI-3) will not allow to scan more than 256
devices.
Thinking of older Symmetrix here with their weird 'SPC-3 masking as
SCSI-2' habit.
Don't we have a blist entry for those to use REPORT LUNS anyway?
Symmetrix was just an example of weirdness ...
Also currently we're allowing to scan beyond 256 without any
restrictions there might be installations out there which rely on
this behaviour.
Hence this flag.
Which doesn't really have an effect as-is as it's never set.
Because currently there are no target which would require them.
Obviously. But that doesn't mean there won't be any.
Note, this is just a safety net for backwards compability.
If you think we won't need it of course we can remove it.
Cheers,
Hannes
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Dr. Hannes Reinecke zSeries & Storage
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SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg
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