FINISH ZONE question

Neil Wanamaker Neil.Wanamaker at
Tue Jun 9 12:22:03 PDT 2015

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The description of the FINISH ZONE makes no reference to the current value of
the write pointer, but rather to the data returned when UNWRITTEN (my
emphasis) LBAs are read, and to the ending zone condition.
If a drive is not required to preserve data written to it, it has little
value as a storage device.
Neil Wanamaker
Principal Engineer, Enterprise Storage Division
1380 Bordeaux Dr., Sunnyvale, CA 94089
neil.wanamaker at
From: owner-t10 at [mailto:owner-t10 at] On Behalf Of Curtis
Sent: Tuesday, June 09, 2015 11:27 AM
To: T10 at
Subject: FINISH ZONE question
In a sequential write preferred zone, if there are 100 LBAs, and there is a
write to LBA's 0-9, and then a write to LBA 50.  One implementation would
leave the write pointer at LBA 10.
At this point, if the host issues a FINISH ZONE, is LBA 50 required to be
Curtis E. Stevens
Director, Standards & Features Technology
3355 Michelson Dr. #100
Office: 1-1041
Irvine, Ca. 92612
Phone: 949-672-7933
Cell: 949-307-5050
E-Mail: Curtis.Stevens at
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