IECTMS1 is prompted after applying maintenance (and other info related to NL tape processing).
Article ID: 74790
Updated On:
Products
Issue/Introduction
With CA1 14.0 and maintenance applied, the IECTMS1 WTOR is displayed when a DLm PRIVATE NL tape is mounted. Other info concerning NL tape processing is also provided in this KB article.
Environment
Component: 1
Resolution
CA 1 tape processing takes increasing advantage of the IBM standard tape exits for OPEN, CLOSE, and End-of-Volume (EOV) processing. Use of standard tape exits reduces the number of CA 1 dynamic tape exits. Standard tape exits further promote the reliability of tape processing in the data center.
One noticeable change that using the IBM standard O/C/EOV exits has introduced, however, is that when a specific volume is requested using NL or BLP processing the requested volser is not filled into the UCB control block at the time that the IECTMS1 WTOR (i.e., IECTMS1 dddd, ,ENTER VSN) is issued. So, a "D U,,,xxxx,1" of the UCB in question will not show the requested volser (only the original mount message will); however, as a reminder, the IECTMS1 WTOR can be simply eliminated by having the NLWTOR option set to NO (or N) in the TMOOPTxx member of the CA 1 options library.
Control IECTMS1 WTOR – NLWTOR parameter:
Use the CA1 NLWTOR parameter to control whether the IECTMS1 WTOR is issued when a tape is requested by specific VOLSER and no labels are present.
The hlq.CTAPOPTN(TMOOPTxx) NLWTOR parameter has the following options:
NO
Prevents the IECTMS1 WTOR from being issued when a tape is requested by a specific VOLSER and no labels are present. This option assumes that the requested volume is mounted correctly (i.e., the volume is not labelled and is in PRIVATE status if OAM is being used, such as for a VTL). Many sites with robotic systems that still use NL or BLP use this option to prevent this WTOR. If a request is made to read an NL volume with volser 123456 (i.e., VOL=SER=123456,LABEL=NL), then in a robotic environment it can be assumed that the requested volume is always correctly mounted, thus no need to issue the IECTMS1 messages.
YES
(Default) Indicates that the IECTMS1 WTOR is issued.
In this issue involving processing of NL tapes for DLM, the NLWTOR parameter should be set to NO and activated by running TMSINIT to suppress issuance of the IECTMS1 message.
Note: If NLWTOR is set to YES (which is the default), and JCL requests a non-specific mount for an NL volume (i.e., the JCL does not supply a specific VOLSER), then the IECTMS1 WTOR will be issued with the possibility that a non-NL tape is mounted (i.e., an SL tape gets mounted). In such case the user will not know beforehand the volser actually being mounted (that is, *before* the IECTMS1 messages are issued, thus the user will likely reply to the IECTMS1 with an incorrect volser). This will result in messages such as the following being issued:
IEC512I LBL ERR uuuu,vvvvvv,SL,xxxxxx,NL,........
IEC502E R uuuu,xxxxxx,SL,.....
The system will reject the SL tape and loop again, requesting another volume. The user can avoid this problem by setting the NLWTOR parameter to NO, and hard-coding the volser of a known NL tape in the JCL. Also, for OAM/SMS controlled tapes, this tape should be PRIVATE and NOT SCRATCH (else a CBRXLCS error will be generated).
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