SBC-3r35i/j issue

Elliott, Robert (Server Storage) Elliott at hp.com
Wed Sep 25 13:13:25 PDT 2013


Formatted message: <a href="http://www.t10.org/cgi-bin/ac.pl?t=r&f=r1309253_f.htm">HTML-formatted message</a>

Based on teleconference discussion, 13-213r1 to r2 was supposed to remove
"unmap" from both paragraphs, but that was missed and not noticed for r3.
---
Rob Elliott    HP Server Storage
From: owner-t10 at t10.org [mailto:owner-t10 at t10.org] On Behalf Of Knight,
Frederick
Sent: Wednesday, 25 September, 2013 2:14 PM
To: T10 Reflector
Subject: SBC-3r35i/j issue
OK folks, it looks like we made a mistake in 13-213r3.	We had an a) ... or
b) list where adding a word caused a significant functional change.  There
are 2 possible corrections (remove the word we added, or add more words).  My
suggestion is that we add the additional words so that the both the a)
conditions and the b) conditions apply to the then portion of the statement:
4.7.3.7 Thin provisioned logical unit resource exhaustion considerations
If:
a)	 a write operation is requested ... ; or
b)	an unmap operation that ... is requested ...
then the device server shall terminate the command requesting the unmap
operation with CHECK ...
The problem is the change from the bare "operation" to a specific "unmap
operation".  The same addition of the word "unmap" occurs in the second a)/b)
list as well, and the addition of that word in both places is the source of
this new problem.
The addition of that word now restricts the "then" clause to only apply to
the b) case of the "if" and the a) case of the "if" now has no text in the
"then" clause.	The "then" clause is supposed to apply to both cases - a) ;
or b).
Either we need to remove "unmap" from that sentence. Or we need to change it
to include both the unmap operation and the write operation - as in something
like:
If:
a)	 a write operation is requested ... ; or
b)	an unmap operation that ... is requested ...
then the device server shall terminate the command requesting the write
operation or the unmap operation with CHECK ...
		Fred Knight



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