Reservation question
David A. Peterson
dap at storage.network.com
Mon Aug 21 19:59:55 PDT 2000
* From the T10 Reflector (t10 at t10.org), posted by:
* "David A. Peterson" <dap at storage.network.com>
*
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Howdy All,
FCP-2 rules for non-persistent device reservations:
LOGO/PLOGI: the device reservation shall be cleared only for the SCSI
Initiator port initiating the action (this includes explicit and
implicit LOGO/PLOGI)
PRLI: the device reservation shall be cleared only for the SCSI
Initiator port initiating the action if "establish image pair =1"
PRLO: the device reservation shall be cleared only for the SCSI
Initiator port initiating the action (this includes explicit and
implicit PRLO)
Gerry.Houlder at seagate.com wrote:
>
> * From the T10 Reflector (t10 at t10.org), posted by:
> * Gerry.Houlder at seagate.com
> *
> My reading of the standard says that a STOP UNIT or START UNIT have no
> effect on reservations. Only a RELEASE command or a reset (power cycle,
> SCSI BUS RESET, TARGET RESET, LUN RESET) should release a reservation. I'm
> not familiar with the rules for LOGOUT and LOGIN on fibre channel -- I'll
> let someone else answer that. The drive should remember the reservation
> state while spun down and after being spun back up again. While the drive
> is spun down, it is allowed to report CHECK CONDITION status with NOT READY
> sense bytes instead of RESERVATION CONFLICT (the standard doesn't impose
> any preferred order, although there is wording that tries to prefer BUSY,
> QUEUE FULL, or RESERVATION CONFLICT over CHECK CONDITION).
>
> I checked this against the Seagate drive implementation and found that our
> drives do preserve reservation information through spin down/spin up
> cycles. Its nice to know that our drives do what I think they should.
>
> gop at us.ibm.com@t10.org on 08/21/2000 09:02:33 AM
>
> Sent by: owner-t10 at t10.org
>
> To: t10 at t10.org
> cc:
>
> Subject: Reservation question
>
> * From the T10 Reflector (t10 at t10.org), posted by:
> * gop at us.ibm.com
> *
> For your Monday morning SCSI question I have the following:
>
> Is a RESERVATION (that's a normal reservation not a persistent one)
> preserved through a START/STOP command being issued with a stop?
>
> Bye for now,
> George Penokie
>
> Dept Z9V 114-2 N212
> E-Mail: gop at us.ibm.com
> Internal: 553-5208
> External: 507-253-5208 FAX: 507-253-2880
>
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