Minutes of SSC/SMC meeting 7/13/95
Erich Oetting
erich_oetting at stortek.com
Thu Jul 13 22:14:24 PDT 1995
Minutes of SSC/SMC Working Group mtg. =
X3T10/95-284 r0
Colorado Springs, CO.=20
Accredited Standards Committee
X3, Information Technology
To: Membership of X3T10
=46rom: Erich Oetting
Subject: Minutes of SSC/SMC Working Group Meeting
Colorado Springs,CO. July 13, 1995
Agenda
1. Opening Remarks
2. Approval of Agenda
3. Attendance and Membership
4. SSC Topics
4.1 - Existing Density codes.
4.2 - Density Support command (X3T10/95-224r4)
4.3 - Initiator controlled write protect. (X3T10/95-134r0)
4.4 - Flushing the write buffer. =20
4.5 - Log Sense Data.
4.6 - Locate to an invalid block.
4.7 - Compression identifiers in SSC Table 30.
4.8 - Medium Type Field in Mode Sense Header.
4.9 - Are setmarks and filemarks counted as blocks?
4.10 - Tape Capacity page.
4.11 - Device Capabilities page.
5. SMC Topics.
5.1 - Attached Medium Changer.
5.2 - SMC document status.
6. Other Topics
7. Meeting Schedule
8. Adjournment
Results of Meeting
1. Opening Remarks
Ted Lappin, the SSC Technical Editor, called the meeting to order at 9:25 a.=
m.,
Thursday, July 13, 1995. He thanked John Loymeyer of Symbios Logic for=
arranging and hosting the meeting.
As is customary, the people attending introduced themselves and a copy of=20
the attendance list was circulated.
The draft agenda was approved.
3. Attendance and Membership
Attendance at working group meetings does not count toward minimum=20
attendance requirements for X3T10 membership. Working group meetings
are open to any person or organization directly and materially affected by
X3T10's scope of work.
The following people attended the meeting:
Name S Organization Email Address
---------------------- -- --------------------- ------------- =20
Mr. Erich Oetting P Storage Technology erich_oetting at stortek.com
Mr. Alan Olson 3M arolson at mmm.com =
=20
Mr. Al Pease Buslogic alp at buslogic.com =
=20
Mr. Roger Cummings A Storage Technology roger_cummings at stortek.co=
m
Mr. Arlan Stone Unisys arlan.stone at mv.unisys.com=
=20
Mr. Paul Entzel Conner paul.entzel at conner.com =
=20
Mr. Edward Lappin P Exabyte Corp. tedl at exabyte.com
Mr. Ralph Weber ENDL Associates roweber at acm.org
Mr. Lansing Sloan LLNL ljsloan at llnl.gov
Mr. Peter Gossler P NSM Jukebox GmbH 73503,3467 at compuserve.com
10 People Present
Status Key: P - Principal
A,A# - Alternate
O - Observer
L - Liaison
V - Visitor
4. SSC Topics
4.1 - Existing Density codes.
Roger Cummings passed out a list of know tape format standards from X3B5 for=
the group to review. This list will be included in the next mailing after=
a suitable disclaimer is added.
Paul Entzel brought a list of corrections to the QIC density codes in table=
26. This will also be included in the mailing.
4.2 - Density Support command (X3T10/95-224r4)
Ted went over his Report Density Support command proposal. He wants to make=
this command mandatory for SCSI-3 tape devices, and move the current=
density code table to an historical annex. Ralph suggested several minor=
wording changes to clarify the document and comply with SAM terminology.=
Ted and Ralph will continue this work later.=20
It was decided that tape capacity should return the capacity of the=
currently mounted tape if the Media bit is set in the command, and the=
maximum tape capacity if the Media bit is clear.=20
4.3 - Initiator controlled write protect. (X3T10/95-134r0)
Alan Stone had a couple of questions about the soft write protect proposal.
4.4 - Flushing the write buffer. =20
Alan Stone pointed out that some commands do not specify that all write data=
in the buffer must be written to tape before proceeding with the command. =
Ted will look over the SSC commands for other places were this should be re=
quired.
4.5 - Log Sense Data.
Possible additions to Log Sense data for tape devices were discussed. Alan=
will write up a proposal for reporting tape cleaning and compression ratio=
information.=20
4.6 - Locate to an invalid block.
How to handle a locate to a block that does not exist was discussed. A=
locate to just past the last block on tape should return good status. A=
locate for a position past EOD that stops at EOD should return BLANK CHECK,=
EOD DETECTED set the valid bit and information bytes. If the locate gets=
lost, it should return MEDIUM ERROR and an appropriate ASC/ASCQ.
4.7 - Compression identifiers in SSC Table 30.
Paul asked about including additional compression codes. He will submit a=
formal proposal later.
4.8 - Medium Type Field in Mode Sense Header.
This field will be made vendor unique instead of reserved to allow for=
current QIC practice.
4.9 - Are setmarks and filemarks counted as blocks?
It was decided that Locate and Read Position should count setmarks and=
filemarks as blocks. This should be made explicit in the model in SMC.=20
4.10 - Tape Capacity page.
How to report remaining tape capacity was discussed, but no action was taken=
More information about the T10
mailing list