Obsolete untagged tasks proposal

Elliott, Robert (Server Storage) elliott at hp.com
Tue Sep 2 15:06:23 PDT 2003


* From the T10 Reflector (t10 at t10.org), posted by:
* "Elliott, Robert (Server Storage)" <elliott at hp.com>
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(sorry for the delay - I've been on vacation)
=20
Tapes supporting Ultra 320 (packetized) SCSI, SRP (SCSI over
InfiniBand), and SAS have to change since the protocols don't define how
to specify untagged tasks.  They shouldn't have much trouble supporting
the basic task management model with a task set size of one.
=20
--=20
Rob Elliott, elliott at hp.com=20
Hewlett-Packard Industry Standard Server Storage Advanced Technology=20
https://ecardfile.com/id/RobElliott=20


        -----Original Message-----
        From: Kevin D Butt [mailto:kdbutt at us.ibm.com]=20
        Sent: Thursday, August 07, 2003 11:51 PM
        To: Elliott, Robert (Server Storage)
        Cc: t10 at t10.org
        Subject: Re: Obsolete untagged tasks proposal
=09
=09

        The typical tape environment uses untagged tasks.  Only in
recent history has anything except untagged tasks been allowed on tape
drives.
=09
        Kevin D. Butt
        Fibre Channel & SCSI Architect, IBM Tape Microcode,=20
        6TYA, 9000 S. Rita Rd., Tucson, AZ  85744
        Tie-line 321; Office: 520-799-5280, Lab: 799-5751, Fax:
799-4138, Email: kdbutt at us.ibm.com=20
=09
=09
=09
        "Elliott, Robert (Server Storage)" <elliott at hp.com>=20
Sent by: owner-t10 at t10.org=20

08/07/2003 12:53 AM=20


       =20
        To:        <t10 at t10.org>=20
        cc:        =20
        Subject:        Obsolete untagged tasks proposal=20




        03-271r0 has been posted to http://www.t10.org/new.htm
<http://www.t10.org/new.htm>  for discussion in the September CAP
meeting.  This proposes obsoleting untagged tasks in SAM-3 and SPC-3.=20

        In SAM-2, transport protocols were allowed to not support
untagged tasks.  SRP, SPI-4 information units, and SAS have all gone
ahead and done so.  iSCSI and FCP, on the other hand, put in special
provisions to specify "untagged" via their task attribute fields.  This
would obsolete the perceived need for that.=20

        ---=20
        Rob Elliott, HP Server Storage=20
        elliott at hp.com=20

=09


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(sorry=20 for the delay - I've been on vacation)
 
Tapes=20 supporting Ultra 320 (packetized) SCSI, SRP (SCSI over InfiniBand), and = SAS have=20 to change since the protocols don't define how to specify untagged = tasks. =20 They shouldn't have much trouble supporting the basic task management = model with=20 a task set size of one.
 
-- = 
Rob Elliott, = elliott at hp.com=20 
Hewlett-Packard = Industry Standard=20 Server Storage Advanced Technology 
<3d.htm>https://ecardfile.com/id/Rob= Elliott=20 

-----Original Message----- 
From: = Kevin D Butt=20 [mailto:kdbutt at us.ibm.com] 
Sent: Thursday, August 07, 2003 = 11:51=20 PM 
To: Elliott, Robert (Server Storage) 
Cc:=20 t10 at t10.org 
Subject: Re: Obsolete untagged tasks=20 proposal

The = typical tape=20 environment uses untagged tasks.  Only in recent history has = anything=20 except untagged tasks been allowed on tape drives.
Kevin D.=20 Butt 
Fibre Channel & SCSI Architect, IBM Tape Microcode, = 
6TYA, 9000=20 S. Rita Rd., Tucson, AZ  85744 
Tie-line 321; Office: = 520-799-5280,=20 Lab: 799-5751, Fax: 799-4138, Email: kdbutt at us.ibm.com = 

"Elliott, Robert (Server = Storage)"=20 <elliott at hp.com> 
Sent=20 by: owner-t10 at t10.org=20 
08/07/2003 12:53 AM = 
     = 
     To: =   =20   <t10 at t10.org> 
     cc:     =20   
  =  =20   Subject:       Obsolete untagged = tasks=20 proposal 


03-271r0 has been posted to <3d.htm>http://www.t10.org/new.htm=20 for discussion in the September CAP meeting.  This proposes = obsoleting=20 untagged tasks in SAM-3 and SPC-3.=20 
In SAM-2, transport protocols were = allowed to not=20 support untagged tasks.  SRP, SPI-4 information units, and SAS = have all=20 gone ahead and done so.  iSCSI and FCP, on the other hand, put in = special=20 provisions to specify "untagged" via their task attribute fields. =  This=20 would obsolete the perceived need for that.=20 
---=20 
Rob Elliott, HP Server = Storage 
elliott at hp.com 

=00
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