A BRMS operation, (save or restore) will keep the drive allocated until the tape is unloaded and/or rewind.
From IBM support.
- When an operation needing a tape resource runs and needs a tape drive
the tape code will attempt to reserve a tape drive. If it cannot get a
reservation on it's first choice it will try again to reserve another
drive. It will do this repeatedly until it gets a reservation or until
all drive resources have been tried. Assuming a drive is found that is
available a 'reservation' is put on the tape drive resource. This
reservation exists on the tape drive itself and is assigned to a
specific adapter port by World Wide Port Name (WWPN). This reservation
will be persistent until the host releases the reservation. If anything
stops the host from releasing the reservation the drive will remain
reserved and can only be used by that specific port adapter.
- Once a drive is reserved and a tape needs to be mounted, tape code
will check to see if the tape is already mounted in another drive. If
the tape is mounted in another drive the system running the operation
needing a tape resource will attempt to reserve the tape drive that the
tape is mounted in. If it gets the reservation for a short period of
time the job will have caused two drives to be reserved. The first drive
will be released shortly, however if multiple jobs are starting at the
same time that need drives it is possible that each job could reserve
multiple drives for short periods of time and some job may not be able
to get a drive. Operations requiring more than one tape resource such as
DUPMEDBRM or DUPTAP can magnify this issue. Slightly staggering job
start times can reduce this possibility.
- Different types of errors (user, job, device) can cause a reservation
to be left hanging on a drive. Once this happens, only the system using
the adapter port with the proper WWPN will be able to use the tape drive
or release the reservation.
- Although it may not be common; changes to the fabric can make it
impossible for a system to release a reservation. For example:
Job Runs and TAP01 is reserved
Job ends abnormally and does not release reservation
Fibre cable is moved to a different adapter port
At this point there is no way any of the host systems can release this
reservation...
Paul
-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Farhan
Sent: Friday, June 17, 2016 11:37 AM
To: Midrange Systems Technical Discussion
Subject: Re: WRKMLBSTS , Remove a job
*Opt Devices/Resource Status
Allocation Job Name*
___ TAPMLB01 VARIED OFF
___ TAPMLB02 ACTIVE
___ TAP04 ACTIVE
UNPROTECTED QBRMBKUP
___ TAP05 OPERATIONAL
UNPROTECTED
___ TAPMLB13 VARIED OFF
I have this Job stuck in TAP04 , in my WRKMLBSTS and it is always in the ACTIVE status even when the job is not running. I want to remove this.
Please let me know the procedure for it.
On Fri, Jun 17, 2016 at 11:00 AM, Rob Berendt <rob@xxxxxxxxx> wrote:
List strips off images.
Try some other way to paste the text.
Rob Berendt
--
IBM Certified System Administrator - IBM i 6.1 Group Dekko Dept 1600
Mail to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com
From: Farhan <mohd.farhan1029@xxxxxxxxx>
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>,
"RPG programming on the AS400 / iSeries" <rpg400-l@xxxxxxxxxxxx>
Date: 06/17/2016 10:24 AM
Subject: WRKMLBSTS , Remove a job
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>
Hi All,
I have this Job stuck in TAP04 , in my WRKMLBSTS and it is always in
the ACTIVE status even when the job is not running. I want to remove this.
Please let me know the procedure for it.
[image: Inline image 1]
Thank you,
Farhan
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