Persistent Reservation question; reply to George

Ulrich, David dulrich at lsil.com
Tue Nov 14 06:50:04 PST 2000


* From the T10 Reflector (t10 at t10.org), posted by:
* "Ulrich, David" <dulrich at lsil.com>
*
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George,=20

Given your example below, does this mean that 3 reservations could be
SCSI-2 and the other 3 persistent reservations.=20

Best Regards=20
David=20

-----Original Message-----=20
From: George_Penokie/Tivoli_Systems%TIVOLI_SYSTEMS at us.ibm.com=20
[ mailto:George_Penokie/Tivoli_Systems%TIVOLI_SYSTEMS at us.ibm.com
<mailto:George_Penokie/Tivoli_Systems%TIVOLI_SYSTEMS at us.ibm.com> ]=20
Sent: Monday, November 13, 2000 4:59 PM=20
To: Ulrich, David=20
Cc: 't10 at t10.org'=20
Subject: Re: Persistent Reservation question=20


* From the T10 Reflector (t10 at t10.org), posted by:=20
* George_Penokie/Tivoli_Systems%TIVOLI_SYSTEMS at us.ibm.com=20
*=20
David,=20
All types of reservations are confined to a logical unit. So if you =
have
6=20
logical units you could have 6 reservations from 6 different =
initiators.


Bye for now,=20
George Penokie=20

Dept 2C6  114-2 N212=20
E-Mail:    gpenokie at tivoli.com=20
Internal:  553-5208=20
External: 507-253-5208   FAX: 507-253-2880=20


"Ulrich, David" <dulrich at lsil.com>@t10.org on 11/13/2000 03:41:33 PM=20

Sent by:  owner-t10 at t10.org=20


To:   "'t10 at t10.org'" <t10 at t10.org>=20
cc:=20
Subject:  Persistent Reservation question=20





I have a question regarding the degree of mutual exclusion of RESERVE=20
commands and PERSISTENT RESERVE IN/OUT commands.=20

In the SPC-2 working draft rev. 18, section 5.5.1, page 21, the third=20
paragraph states that "if a logical unit has been reserved by any
RESERVE=20
command and is still reserved by any initiator, all PERSISTENT RESERVE
IN=20
and all PERSISTENT RESERVE OUT commands shall conflict regardless of=20
initiator or service action and shall terminate with a RESERVATION
CONFLICT=20
status".=20

My question is, does that mean a PERSISTENT RESERVE IN/OUT command to
any=20
logical unit or only the logical unit that is reserved using a RESERVE=20
command?  In other words, can the two different types of reservations=20
co-exist as long as they have been executed by different logical units? =


Thanks.=20

David Ulrich=20
dulrich at lsil.com=20
Storage Systems Division=20
LSI Logic Inc.=20




*=20
* For T10 Reflector information, send a message with=20
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RE: Persistent Reservation question; reply to George George, Given your example below, does this mean that 3 = reservations could be SCSI-2 and the other 3 persistent = reservations. Best Regards 
David -----Original Message----- 
From: = George_Penokie/Tivoli_Systems%TIVOLI_SYSTEMS at us.ibm.com 
[= mailto:George_Penokie/Tivoli_Systems%TIVOLI_SYSTEMS at us.ibm.com] 
Sent: Monday, November 13, 2000 4:59 PM 
To: Ulrich, David 
Cc: 't10 at t10.org' 
Subject: Re: Persistent Reservation question 
* From the T10 Reflector (t10 at t10.org), posted = by: 
* = George_Penokie/Tivoli_Systems%TIVOLI_SYSTEMS at us.ibm.com 
* 
David, 
All types of reservations are confined to a logical = unit. So if you have 6 
logical units you could have 6 reservations from 6 = different initiators. Bye for now, 
George Penokie Dept 2C6  114-2 N212 
E-Mail:    gpenokie at tivoli.com 
Internal:  553-5208 
External: 507-253-5208   FAX: = 507-253-2880 
;Ulrich, David; = <dulrich at lsil.com>@t10.org on 11/13/2000 03:41:33 PM Sent by:  owner-t10 at t10.org 
To:   ;'t10 at t10.org'; = <t10 at t10.org> 
cc: 
Subject:  Persistent Reservation = question 



I have a question regarding the degree of mutual = exclusion of RESERVE 
commands and PERSISTENT RESERVE IN/OUT = commands. In the SPC-2 working draft rev. 18, section 5.5.1, = page 21, the third 
paragraph states that ;if a logical unit has = been reserved by any RESERVE 
command and is still reserved by any initiator, all = PERSISTENT RESERVE IN 
and all PERSISTENT RESERVE OUT commands shall = conflict regardless of 
initiator or service action and shall terminate with = a RESERVATION CONFLICT 
status;. My question is, does that mean a PERSISTENT RESERVE = IN/OUT command to any 
logical unit or only the logical unit that is = reserved using a RESERVE 
command?=A0 In other words, can the two different = types of reservations 
co-exist as long as they have been executed by = different logical units? Thanks. David Ulrich 
dulrich at lsil.com 
Storage Systems Division 
LSI Logic Inc. 


* 
* For T10 Reflector information, send a message = with 
* 'info t10' (no quotes) in the message body to = majordomo at t10.org 
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