[T10] Tape Stream Miroring incorporation into SPC-5 r11 feedback

Kevin D Butt kdbutt at us.ibm.com
Thu Aug 4 11:11:27 PDT 2016


My comments inline below offset by <<kdbutt: >>

Kevin D. Butt
SCSI Architect, Tape Firmware, CAMSS
T10 Standards
MS 6TYA, 9000 S. Rita Rd., Tucson, AZ 85744
Tel: 520-799-5280
Fax: 520-799-2723 (T/L:321)
Email address: kdbutt at us.ibm.com
http://www-03.ibm.com/servers/storage/ 



From:   Dennis Appleyard <dennis.appleyard at oracle.com>
To:     Kevin D Butt/Tucson/IBM at IBMUS, Ralph Weber <roweber at ieee.org>, 
curtis.ballard at hpe.com, Darryl Torske <Darryl.Torske at quantum.com>
Cc:     "T10 org (t10 at t10.org)" <t10 at t10.org>
Date:   08/03/2016 19:33
Subject:        Re: Tape Stream Miroring incorporation into SPC-5 r11 
feedback



Kevin,
Thanks for the review.
My comments are inline below. 
Dennis

On 8/1/2016 1:09 PM, Kevin D Butt wrote:
Ralph, Dennis, and all,

I have 10 comments related to the incorporation of Tape Stream Mirroring 
into SPC-5r11. I included an fdf, but also wrote it out in text since I 
think Dennis can't do fdf's and I am not sure how an attached fdf will get 
processed by the reflector.

I admit, some of the comments are not strictly incorporation issues, so I 
have split them into one list of strictly incorporation issues, and one 
list that is more (and may need a proposal written if there is consensus 
that they should be changed)

Strictly incorporation issues:
On page 280, table 142, byte 8, there are missing vertical lines in the 
table.
Agree

On page 281, fourth paragraph, "then the <<copy manager shall and device 
server shall>>establish a
deferred error condition with CHECK CONDITION status" I think there is 
something wrong with "copy manager shall and device server shall" The 
device server is the one to establish a deferred error. The copy manager 
has a requirement to terminate the copy operation which was just stated 
prior to the then, so what does the copy manager need to do here? I think, 
perhaps, the "copy manager shall and" should be deleted, but perhaps there 
was intent to have something here.
I suggest changing to "then the copy  manager shall direct the device 
server to establish a deferred error condition" This was the wording in 
the proposal.

Other issues:
On page 200, third paragraph, I think the "e.g." should be an "i.e."
Agree

On page 201, first paragraph, "SSC-5 or ADC-4" should be "SSC-5 and 
ADC-4".
Agree

On page 201, first paragraph, "A sequential-access device that supports 
the tape stream mirroring copy
operation shall support the TSMC bit in the Sequential-access Device 
Capabilities VPD page (see SSC-5)being set to one." This is a VPD page. I 
think it should say "shall set ... to one" instead of "shall support ... 
being set to one"
I think text should not be changed or should have "being set to one." 
removed. 
The TSMC bit set to one indicates that the device is capable of tape 
stream mirroring as set by a method outside the scope of the standard 
(operator 
panel) or set by a Set Tape Stream Mirroring command from the ADC 
interface when a library configures its drives. The TSMC bit set to zero 
indicates that
the device is not capable of tape stream mirroring because it knows 
nothing about tape stream mirroring or that tape stream mirroring has been 
made not available by a operator panel or the Set Tape Stream Mirroring 
command from the ADC interface. 
<<kdbutt: I missed the connection to "capable" in the configuration. The 
current text as incorporated is correct. No change needed.>>

On page 204, row for 19h, "The equivalent affects of data transfer and 
positioning requested for the copy source shall be mirrored to the 
specified CSCD as equivalent data transfers and positioning requests to 
those processed for the copy source. Mirroring shall continue until 
stopped by the copy manager."  
    1) The word "affects" should be "effects" and 
Agree
    2) "as equivalent data transfers and positioning requests to those 
processed for the copy source" actually detracts from the intent. I think 
the entire quoted text from "as" to the end of the sentence should be 
deleted.
Agree

On page 280, first paragraph, "tape copy source" and "tape copy 
destination" should have the word "tape" deleted. There is already a 
requirement in third paragraph below the table to enforce the peripheral 
device type to be 01h.
Agree




Kevin D. Butt
SCSI Architect, Tape Firmware, CAMSS
T10 Standards
MS 6TYA, 9000 S. Rita Rd., Tucson, AZ 85744
Tel: 520-799-5280
Fax: 520-799-2723 (T/L:321)
Email address: kdbutt at us.ibm.com
http://www-03.ibm.com/servers/storage/



From:        Ralph Weber <roweber at ieee.org>
To:        "T10, Reflector" <T10 at t10.org>
Date:        07/30/2016 18:32
Subject:        [T10] SPC-5 r11 is available for download
Sent by:        t10-bounces at t10.org



Incorporating all the proposals approved in Denver, SPC-5 r11 is not 
available for your reading enjoyment.

http://www.t10.org/cgi-bin/ac.pl?t=f&f=spc5r11.pdf

Four substantive typos were discovered in data structure format tables 
during the incorporation of 16-067r5 (PREPARE BINDING REPORT command). 
All four were corrected by the editor, in consultation with the proposal 
authors where necessary.

In recognition of the fact that programmers are known to implement by 
reading only the pictures, a toe tag (aka Editor's note) has been 
attached to each of the four miscreants. Anticipating that there will be 
an SPC-5 r12, a proposal is being prepared to "do the right thing" with 
the Editor's notes.

Two other major enhancements can be found in SPC-5 r11: SCSI Feature 
Sets and Tape Stream Mirroring. Since the editor always reads and 
sanity-corrects multi-page proposals, persons with passionate interests 
are encouraged to open the PDF to see what glyphs hit the pages.

All the best,

.Ralph




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