FINISH ZONE question
brad.besmer at avagotech.com
Tue Jun 9 12:45:40 PDT 2015
Formatted message: <a href="http://www.t10.org/cgi-bin/ac.pl?t=r&f=r1506092_f.htm">HTML-formatted message</a>
As currently specified in zbc-r03:
>> One implementation would leave the write pointer at LBA 10.
This would be compliant. In 18.104.22.168 Sequential write preferred zone model:
Figure 8 shows examples of write commands that do not start at the write
pointer (i.e., a non-sequential write operation). The ending value of the
write pointer for these examples is outside the scope of this standard.
>> At this point, if the host issues a FINISH ZONE, is LBA 50 required to
Yes, as indicated by 22.214.171.124: Write pointer zones overview
A read operation on an LBA that has been written since the last reset write
pointer operation in that write pointer zone shall return the last written
Are you perhaps suggesting a potential change?
*From:* owner-t10 at t10.org [mailto:owner-t10 at t10.org] *On Behalf Of *Neil
*Sent:* Tuesday, June 09, 2015 1:22 PM
*To:* Curtis Stevens; T10 at t10.org
*Subject:* RE: FINISH ZONE question
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.
Principal Engineer, Enterprise Storage Division
1380 Bordeaux Dr., Sunnyvale, CA 94089
neil.wanamaker at pmcs.com
*From:* owner-t10 at t10.org [mailto:owner-t10 at t10.org <owner-t10 at t10.org>] *On
Behalf Of *Curtis Stevens
*Sent:* Tuesday, June 09, 2015 11:27 AM
*To:* T10 at t10.org
*Subject:* FINISH ZONE question
In a sequential write preferred zone, if there are 100 LBAs, and there is a
write to LBAâs 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
Irvine, Ca. 92612
E-Mail: Curtis.Stevens at WDC.com
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