Does ZBC need a VPD page?

Joe Breher Joe.Breher at
Mon Oct 6 12:12:23 PDT 2014

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In our rush to adopt 14-212, we also neglected to discuss the possibility
that the LBA in the ZONE START LBA field may not be a member of any zone.
Yes, a device may, by current proposals, have a disjoint zone map. At the
very least, this hastily-adopted proposal will need to be amended to define
handling for such an error condition.
Joe Breher
(478) 2-Breher
(478) 227-3437
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On Oct 4, 2014, at 7:22 AM, Ralph Weber wrote:
Based on the ZBC interface simplification ideas introduced for the REPORT
ZONES command in 14-212 (see, some WD engineers have
asked whether additional reductions in complexity might be accomplished by
moving the contents of the Zoned Block Device VPD page to the amply spacious
header of the REPORT ZONES parameter data.
To this end, a detailed proposal has been uploaded for review during Monday's
ZBC call:
All the best,

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