[T10] The ZONED field & "friends"

Ralph Weber Ralph.Weber at wdc.com
Mon Sep 16 10:35:10 PDT 2019

Two proposals have been posted based on the recommendations of last week's CAP confab.

  *   19-088r2<http://www.t10.org/cgi-bin/ac.pl?t=d&f=19-088r2.pdf> SBC-4: Modernize the ZONED field
  *   19-106r0<http://www.t10.org/cgi-bin/ac.pl?t=d&f=19-106r0.pdf> ZBC-2: Configuration Info in ZBC VPD page

As per CAP's preference, 19-088r2 makes the 01b ZONED code-point applicable to all zoned block devices that use device type 00h (direct access block), with a pointer to the Zoned Block Device Characteristics VPD page for details about different zoned block device configurations. Then, 19-106r0 adds an appropriate field to the aforementioned VPD page.

FWIW 19-088r2 also takes a swing at putting into words what CAP said about the glossary entry for 'device managed zoned block device'. Lest there be any who might miss the glossary change, the revised definition reads:
device server that implements sequential write preferred zones (see ZBC-2) in ways that do not affect the inputs and outputs for any of the commands defined in this standard

All the best,

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