112 IBM Content Manager OnDemand Guide
not set, the default for each storage group is 1. This value must be set for each storage 
group that requires a value larger than the default of 1. For a single storage group, you 
must set this parameter if you must retrieve documents from two or more tapes 
concurrently.
/SM590000Set the OAM cataloged procedure parameter MAXS (the number of storage groups that the 
storage management cycle processes concurrently) to an appropriate value. If MAXS 
increases above 10, the effectiveness of concurrency diminishes and OAM processing 
can be severely constrained or unsuccessful. If concurrent processing includes OBJECT 
storage groups that write to tape volumes, you must specify the correct corresponding 
(global level) MAXTAPERETRIEVETASKS and MAXTAPESTORETASKS values on the SETOAM 
statement. 
/SM590000If you are using optical platters or tapes, set the tape DEMOUNTWAITTIME time parameter 
appropriately. This parameter determines how long OAM leaves a tape volume mounted in 
anticipation of another retrieval request from that device. 
Maximum Object Size (MOS)
OAM now supports storing object sizes up to 256 MB. Authorized program analysis report 
(APAR) OA03623 lists the program temporary fix (PTF) that is available for each release of 
z/OS. To enable support for object sizes up to 256 MB, you must specify the maximum object 
size by adding MOS =256 to the OAM subsystem definition parameter INITPARM in the 
SYS1.PARMLIB(IEFSSNxx) member.
The Maximum Object Size (MOS) can be viewed by running the following command:
D SMS,OAM
The results of that command are shown:
OAM1 Parms: TIME=GMT  MSG=EM  UPD=N  QB=Y  
MOS=  256  OTIS=N  LOB=N  DP=N
If the MOS is too small, Content Manager OnDemand returns an error similar to “OAM Store 
Failed with an OSREQ RC=8 and Reason=24020202”. Y ou must increase the MOS size. For 
more information, review the document at this website:
http://www.ibm.com/support/docview.wss?uid=swg21408525
Optical platters
When you work with optical platters, check and adjust the values for the following parameters 
in SYS1.PARMLIB(CBROAMxx):
/SM590000MOUNTWAITTIME: Specifies the amount of time (in minutes) that can pass while a volume 
waits to be mounted on an operator-accessible drive within an optical library. After this 
time expires, message CBR4426D is issued to allow the operator to try again or to cancel 
the volume mount request. This value can be any numeric value 1 - 9999. If the operator 
retries the mount request, the value that is specified in the MOUNTWAITTIME parameter is 
used for the retry. The default value of this parameter is 5 minutes.
/SM590000OPTICALDISPATCHERDELAY: Specifies the number of seconds that the OAM optical 
dispatcher delays the processing of certain requests to minimize the flipping of optical disk 
cartridges in an automated optical storage library that expects that another read request 
for the currently mounted optical disk volume will arrive within this delay interval. 
The OAM optical dispatcher delays processing of a unit of work for a specific period, when 
all of the following conditions are true:
– A read request for an object on a currently mounted optical disk volume was 
completed.