Summary of DFSMShsm default values
Table 1 is a summary of the defaults DFSMShsm uses if you never specify a SETSYS command during or after startup.
| DFSMShsm default value | Result |
|---|---|
| ABARSACTLOGMSGLVL(FULL) | All DFSMSdss messages that are written to the ABARS activity log. |
| ABARSACTLOGTYPE SYSOUT(A) | ABARS activity logs are allocated to the SYSOUT class A. |
| ABARSDELETEACTIVITY(N) | The ABARS activity log is not automatically deleted. |
| ABARSKIP(NOPPRC NOXRC) | ABACKUP processing will not skip data sets on volumes protected by peer-to-peer remote copy or extended remote copy. |
| ABARSOPTIMIZE(3) | DFSMShsm reads five tracks at a time. |
| ABARSPROCNAME(DFHSMABR) | DFSMShsm uses DFHSMABR as the base procedure name on the internal START command to start the secondary address space. |
| ABARSTAPES(STACK) | The default is STACK and DFSMShsm stacks output files onto a minimum number of tape volumes. |
| ABARSUNITNAME(3590-1) | ABARS selects 3590-1 units when invoking aggregate backup or aggregate recovery. |
| ABARSVOLCOUNT(NONE) | The default is NONE and DFSMShsm does not pass the VOLCOUNT parameter to DFSMSdss. |
| ACTLOGMSGLVL(FULL) | Messages are generated and logged for all activities. |
| ACTLOGTYPE SYSOUT(A) | If you specified SYSOUT without a class, the output is class A, one copy, no special forms. |
| ARECOVERML2UNIT(3590-1) | ARECOVER selects 3590-1 units when recovering data sets to ML2 tape. |
| ARECOVERPERCENTUTILIZED(80) | When specifying this parameter, DFSMShsm uses a default of 80% to fill non-SMS DASD recovery volumes. Otherwise, the valid values you can use range from 1 to 100. |
| ARECOVERTGTGDS(SOURCE) | The default is SOURCE. |
| ARECOVERUNITNAME(3590-1) | DFSMShsm uses a unit of 3590-1 for aggregate recovery of data sets recovered to tape. |
| AUTOBACKUPSTART(0) | DFSMShsm does not run automatic backup. |
| AUTODUMPSTART(0) | DFSMShsm does not run automatic dump. |
| BACKUP(INUSE( |
DFSMShsm does not retry a backup attempt that fails because the data set is in use. If RETRY(Y) is later specified, DFSMShsm delays for 15 minutes before attempting a retry, and requires the data set to be serialized during the retry. |
| BACKUPCOPIES(4) | The default value is read from the multiple-host processor control record (MHCR). The record is updated with values specified on the SETSYS CDSVERSIONBACKUP command every time the command is issued. If the MHCR record does not exist, or the parameter (or subparameter) has never been specified, DFSMShsm keeps four copies of the journal and control data sets. |
| BACKUPDEVICECATEGORY(TAPE) | The default value is read from the multiple-host processor control record (MHCR). The record is updated with values specified on the SETSYS CDSVERSIONBACKUP command every time the command is issued. If the MHCR record does not exist, or the parameter (or subparameter) has never been specified, DFSMShsm backs up the control data sets to tape. |
| BACKUPPREFIX | DFSMShsm uses the UID you specified in the DFSMShsm startup procedure. |
| BCDSBACKUPDSN(uid.BCDS.BACKUP) | The default value is read from the multiple-host processor control record (MHCR). The record is updated with values specified on the SETSYS CDSVERSIONBACKUP command every time the command is issued. If the MHCR record does not exist, or the parameter (or subparameter) has never been specified, the backup data set name for the backup control data set is uid.BCDS.BACKUP. |
CDSVERSIONBACKUP parameters listed separately:
|
The default value is read from the multiple-host processor control record (MHCR). The record is updated with values specified on the SETSYS CDSVERSIONBACKUP command every time the command is issued. If the MHCR record does not exist, or the parameter (or subparameter) has never been specified, DFSMShsm makes multiple backup versions of the control data sets and the journal data set. |
| CLASSTRANSITIONS(EVENTDRIVENMIGRATION(Y SERIALIZATIONEXIT(N))) | Class transitions will be performed during event-driven migration, but user data set serialization error exits will not be used. |
| COMPACT(NONE) | DFSMShsm does not compact any data sets. |
| COMPACTPERCENT(40) | If you specify that DFSMShsm compact data sets, DFSMShsm uses a default of 40% to determine whether a data set will be compacted in the future. Otherwise, DFSMShsm ignores this parameter. |
| CSALIMITS( |
DFSMShsm limits the common service area storage for MWE allocation. The NOWAIT MWE limit is 4, the maximum limit is 100 KB, the active limit is 90 KB, and the inactive limit is 30 KB. |
| DATAMOVER | The default value is read from the multiple-host processor control record (MHCR). The record is updated with values specified on the SETSYS CDSVERSIONBACKUP command every time the command is issued. If the MHCR record does not exist, or the parameter (or subparameter) has never been specified, DFSMShsm default for the type of data movement used when performing CDSVERSIONBACKUP, is DATAMOVER(HSM). |
| DAYS(1) or DAYS(2) | In a single-DFSMShsm-host environment, the data sets must be at least one day old. In a multiple-DFSMShsm-host environment, the data sets must be at least two days old. |
| DFHSMDATASETSERIALIZATION | Data set serialization of system resources is not provided by system facilities. |
| DISASTERMODE(N) | If you specify N, DFSMShsm will request the original tape volume and makes no substitution. |
| DSBACKUP | For DASDSELECTIONSIZE, the default for maximum is 3000 KB and standard is 250 KB. For DASD(TASKS) or TAPE(TASKS), the default is 2. For DEMOUNTDELAY, the default for MAXIDLETASKS is 0 and MINUTES is 60. If GENVSAMCOMPNAMES(YES)|GVCN(YES), and dsname is a VSAM base cluster and newdsname is either migrated or uncataloged, DFSMShsm will process the request, and default names will be assigned to the VSAM data and index components. If GVCN(NO), and dsname is a base cluster and newdsname is migrated or uncataloged, the HBACKDS command will fail. If GVCN(YES|NO) is specified, and newdsname is cataloged and not migrated, or if the data set to be backed up is non-VSAM, the HBACKDS command will fail. |
| DSSXMMODE(N) | DFSMSdss will not be loaded into its own address space for the DFSMShsm function being invoked. Instead, DFSMSdss will be loaded in the DFSMShsm address space. |
| DUMPIO(1,1) | DFSMSdss reads one track at a time. |
| DUPLEX | If you do not specify DUPLEX and either of its subparameters, duplexing does not occur. |
| EXITOFF | Installation exits remain in their current state. |
| EXITON | No installation exits are active. |
| EXPIREDDATASETS(NOSCRATCH) | DFSMShsm ignores the expiration date of a data set and processes it as if the expiration date were not reached. |
| EXTENDEDTTOC(N) | DFSMShsm does not attempt to use extended TTOCs for migration tapes or backup tapes. |
| FASTREPLICATION(DATASETRECOVERY(NONE)) | Traditional copy methods are used for data set level recovery. Fast replication is not used. |
 FASTREPLICATION(MESSAGEDATASET(NO)) |
DFSMShsm does not log fast replication messages in message data sets |
| FASTREPLICATION(FCRELATION(EXTENT)) | Extent-level FlashCopy® relationships will be established during backup and recovery. Free space is not flashed. |
| FASTREPLICATION(VOLUMEPAIRMESSAGES(NO)) | FlashCopy volume pairing debug message ARC1809I is disabled. |
| FREQUENCY(0) | DFSMShsm backs up data sets every time volume backup runs. |
| INCREMENTALBACKUP(ORIGINAL) | DFSMShsm creates an initial backup version (if one does not exist) for all non-VSAM and integrated catalog facility VSAM data sets regardless of the change bit in the format 1 DSCB. |
| INPUTTAPEALLOCATION(NOWAIT) | DFSMShsm does not ask dynamic allocation to wait for an input tape unit to be allocated. Recall and recovery use input tape units. |
| INTERVALMIGRATION | DFSMShsm does interval migration. |
| JES2 | DFSMShsm uses job entry subsystem 2. |
| JOURNAL(SPEED) | DFSMShsm puts the journal entries on a queue but does not wait for the record to be written before DFSMShsm continues processing. |
| JRNLBACKUPDSN(uid.JRNL.BACKUP) | The default value is read from the multiple-host processor control record (MHCR). The record is updated with values specified on the SETSYS CDSVERSIONBACKUP command every time the command is issued. If the MHCR record does not exist, or the parameter (or subparameter) has never been specified, the backup data set name for the journal control data set is uid.JRNL.BACKUP. |
| MAXABARSADDRESSSPACE(1) | DFSMShsm runs aggregate backup or recovery in one secondary address space. |
| MAXBACKUPTASKS(2) | DFSMShsm concurrently runs two volume backup tasks. |
| MAXCOPYPOOLTASKS( |
DFSMShsm concurrently processes a limited number of DFSMSdss invocation tasks for FRBACKUP and FRRECOV. The FRBACKUP limit is 15 and the FRRECOV limit is 15. The DSS limit is the number of volumes that DFSMShsm passes to DFSMSdss to process concurrently per DFSMSdss invocation. |
| MAXDSRECOVERTASKS(2) | DFSMShsm concurrently runs two data set recovery tasks. |
| MAXDSTAPERECOVERTASKS | DFSMShsm uses the value of MAXDSRECOVERTASKS. |
| MAXDUMPRECOVERTASKS(1) | One volume recovery from dump task is processed at a time. |
| MAXDUMPTASKS(2) | DFSMShsm concurrently processes two volume dump tasks. |
| MAXEXTENTS(0) | DFSMShsm does not do extent reduction for active non-VSAM data sets. |
| MAXINTERVALTASKS(2) | Defaults to the value of MAXMIGRATIONTASKS. |
| MAXMIGRATIONTASKS(2) | DFSMShsm defaults to a maximum of 2 migration tasks that can run concurrently. |
| MAXRECALLTASKS(15) | DFSMShsm concurrently processes 15 recall tasks. |
| MAXRECYCLETASKS(2) | DFSMShsm concurrently processes two tasks, each with one input and one output unit during RECYCLE processing |
| MAXSSMTASKS(CLEANUP(2) TAPEMOVEMENT(1)) | DFSMShsm concurrently processes a limited number of secondary space management tasks. The statistics and migration cleanup tasks limit is 2 and the automatic tape migration task limit is 1. |
| MCDSBACKUPDSN(uid.MCDS.BACKUP) | The default value is read from the multiple-host processor control record (MHCR). The record is updated with values specified on the SETSYS CDSVERSIONBACKUP command every time the command is issued. If the MHCR record does not exist, or the parameter (or subparameter) has never been specified, the backup data set name for the migration control data set is uid.MCDS.BACKUP. |
| MIGRATEPREFIX | DFSMShsm uses the UID you specified in the DFSMShsm startup procedure. |
| MIGRATIONCLEANUPDAYS(10 30 3) | DFSMShsm keeps MCDS data set records for recalled data sets for 10 days. DFSMShsm keeps daily and volume statistics records for 30 days. DFSMShsm keeps MCDS data set records for reconnectable data sets for 3 days beyond their predicted remigration date. |
| MIGRATIONLEVEL1DAYS(60) | DFSMShsm does not migrate the data set from a migration level 1 volume to a migration level 2 volume if someone has recalled the data set within the last 60 days. |
| MIGRATIONSUBTASKS(NO) | DFSMShsm does not use migration subtasks. |
| MIGUNITNAME(3590-1) | DFSMShsm uses a unit of 3590-1 to mount scratch tapes during migration. |
| ML1OVERFLOW(DATASSETSIZE(2000000)) | If the calculated size of a data set being backed up or migrated is equal to or greater than 2000000 K bytes, DFSMShsm prefers the OVERFLOW ML1 volume with the least amount of free space that still has enough remaining space for the data set. If the calculated size of the data set is less than 2000000 K bytes, DFSMShsm prefers the NOOVERFLOW ML1 volume with the maximum amount of free space and least number of users. |
| ML2PARTIALSNOTASSOCIATEDGOAL | If the number of ML2 partial tapes not associated with any migration or recycle output task is more than 10 at the time of a RECYCLE ML2 command, DFSMShsm recycles the least full of the excess, leaving the 10 with the highest percentages written. |
| ML2RECYCLEPERCENT | This parameter has no default, however, if it is not specified, the default functionally used is the value specified for RECYCLEPERCENT. If RECYCLEPERCENT is not specified, its default is 20%. |
| MONITOR( |
DFSMShsm prints space and volume information only in the DFSMShsm log. DFSMShsm sends warning messages to the operator when the journal data set or any control data set is 80% full. |
| MOUNTWAITTIME(15) | DFSMShsm waits 15 minutes for an operator to mount the tape before it issues another message asking if the tapes can be mounted. |
| NOACCEPTPSCBUSERID | DFSMShsm does not attempt to retrieve the user ID for TSO batch requests. |
| NOBACKUP | DFSMShsm does not back up or recover any data sets. |
| NOCONVERSION | DFSMShsm does not reblock data sets when it recalls or recovers them. |
| NODEBUG | DFSMShsm processes all data sets and volumes. |
| NOEMERGENCY | DFSMShsm processes all data sets normally. |
| NOERASEONSCRATCH | DFSMShsm does not check for erase of DFSMShsm-owned data sets. DFSMShsm does not ask RACF® for the erase status of the user’s data set when backup versions and migration copies are scratched from DFSMShsm-owned DASD volumes. The data set is deleted but the DASD residual data is not overwritten by data management. |
| NOOPTIMUMDASDBLOCKING | DFSMShsm writes to DFSMShsm-owned DASD in 2 KB blocks. |
| NOPARALLEL | The default value is read from the multiple-host processor control record (MHCR). The record is updated with values specified on the SETSYS CDSVERSIONBACKUP command every time the command is issued. If the MHCR record does not exist, or the parameter (or subparameter) has never been specified, DFSMShsm will backup the control data sets and the journal serially. |
| NOREQUEST | DFSMShsm does not ask operator permission when starting automatic volume space management, automatic secondary space management, automatic backup, and automatic dump at the requested time. |
| NOSKIPABPRIMARY | DFSMShsm automatically backs up data sets on primary volumes. |
| NOSMALLDATASETPACKING | DFSMShsm does not pack small data sets into SDSP data sets on migration level 1 volumes. |
| NOSMF | DFSMShsm does not write SMF records. |
| NOTAPEHARDWARECOMPACT | Improved data recording capability (IDRC) is not used when 3480X is used as the output device. |
| NOUNLOAD | DFSMShsm does not unload your virtual volumes. |
| NOUSERUNITTABLE | DFSMShsm does not use esoteric tape unit names. |
| OBJECTNAMES | DFSMShsm uses the general compaction table. |
| OCDSBACKUPDSN(uid.OCDS.BACKUP) | The default value is read from the multiple-host processor control record (MHCR). The record is updated with values specified on the SETSYS CDSVERSIONBACKUP command every time the command is issued. If the MHCR record does not exist, or the parameter (or subparameter) has never been specified, the backup data set name for the offline control data set is uid.OCDS.BACKUP. |
| ODMNOTIFICATIONLIMIT(100) | Message ARC1901E is issued to the operator's console when the number of volumes concurrently queued for on-demand migration exceeds 100 volumes. |
| ONDEMANDMIGRATION(N) | On-demand migration is disabled. |
| OUTPUTTAPEALLOCATION(NOWAIT) | DFSMShsm does not ask dynamic allocation to wait for an output tape unit to be allocated. Migration, backup, and dump use output tape units. |
| PARTIALTAPE(REUSE) | DFSMShsm marks the tape volume full only when the volume reaches the percent full specified with the SETSYS TAPEUTILIZATION parameter. |
| PDA(ON) | DFSMShsm defaults to ON if the subparameters NONE or OFF are not specified. Tracing begins at DFSMShsm startup and continues until the OFF subparameter is specified or DFSMShsm is stopped or ABENDs. |
| PLEXNAME(PLEX0) | DFSMShsm uses a default HSMplex name of ARCPLEX0. |
| PRIMARYSPMGMTSTART(0) | DFSMShsm does not run automatic primary space management. |
| PROFILEBACKUP | DFSMShsm creates a backup RACF discrete profile for every cataloged RACF-indicated data set that it backs up. |
| PROMOTE | No host in an HSMplex is eligible to take over the Primary or Secondary Space Management functions of a failed host. |
| RACFIND | DFSMShsm puts RACF-indication on migration copies and backup versions. |
| RECALL(ANYSTORAGEVOLUME) | DFSMShsm recalls nonpooled data sets to an online primary volume with the storage use attribute and primary volume attribute of automatic recall. |
| RECYCLEINPUTDEALLOCFREQUENCY(BACKUP | MIGRATION) | DFSMShsm uses zero (0) for both the BACKUP and MIGRATION subparameters. This will keep an input unit allocated until the recycle processing has completed or as long as input can be read. |
| RECYCLEOUTPUT(BACKUP | MIGRATION) | DFSMShsm uses any available tape. |
| RECYCLEPERCENT(20) | The tape volume cannot contain more than 20% valid data when DFSMShsm generically recycles a volume. |
| RECYCLETAKEAWAYRETRY(NO) | DFSMShsm does not automatically generate a new RECYCLE command for a tape when the original recycle must terminate due to the takeaway process, or when the tape is in use by the another DFSMShsm task. |
| RECYCLETAPEALLOCATION(NOWAIT) | DFSMShsm does not ask dynamic allocation to wait for a tape unit to be allocated during recycle processing. |
| RETENTIONPERIOD(7) | The default value is read from the multiple-host processor control record (MHCR). The record is updated with values specified on the SETSYS CDSVERSIONBACKUP command every time the command is issued. If the MHCR record does not exist, or the parameter (or subparameter) has never been specified, DFSMShsm keeps the backup copies of the DFSMShsm control data sets for 7 days. |
| SCRATCHFREQUENCY(9999) | DFSMShsm keeps list data sets for 9,999 days before it scratches them. |
| SECONDARYSPMGMTSTART(0) | DFSMShsm does not run automatic secondary space management. |
| SELECTVOLUME(SCRATCH) | DFSMShsm chooses scratch tapes when an end-of-volume occurs on a tape volume while DFSMShsm is using it. |
| SOURCENAMES | DFSMShsm uses the general compaction table. |
| SPILL(ANY) | DFSMShsm does spill processing on any type of spill backup volume that can be used for output. |
| SWAP | NOSWAP | The system resource manager decides whether or not to make the DFSMShsm address space able to be swapped. |
| SYSOUT(A 1) | DFSMShsm prints to class A, makes one copy, and uses no special form. |
| SYS1DUMP | DFSMShsm writes the output of a DFSMShsm dump to a system dump data set. |
| TAPEDELETION(SCRATCHTAPE) | Tapes become scratch tapes after DFSMShsm recycles them. |
| TAPEINPUTPROMPT(TAPES(YES)) | DFSMShsm issues action messages to the operator asking if needed input tapes are available. |
| TAPEMAXRECALLTASKS(1) | DFSMShsm cannot process more than 1 tape recall task. The rest are DASD recall tasks. This parameter is a subset of the MAXRECALLTASKS parameter. |
| TAPEMIGRATION(NONE |
DFSMShsm selects the first available migration tape when a tape migration level 2 volume is required. If no tapes are available, DFSMShsm selects a scratch tape with the unit name specified or defaulted from the MIGUNITNAME parameter of the SETSYS command. DFSMShsm does not perform reconnection. |
| TAPEOUTPUTPROMPT |
If you specify N, DFSMShsm issues no message to the operator during TAPECOPY processing indicating which type of target tape is to be mounted on a particular device. |
| TAPERECALLLIMITS(TASK(15) TAPE(20)) | DFSMShsm allows a task to continue processing from a single mount of a tape for at least 15 minutes and/or until a tape recall request of higher priority exists which can not be started until a task is freed up. Then the task is freed up for other recalls. DFSMShsm allows a task to have a tape allocated and mounted for at least 20 minutes and/or until another host needs that mounted tape for a higher priority recall. Then the tape is freed up by this host which allows other hosts an opportunity to use that tape. |
| TAPESECURITY(PASSWORD) | DFSMShsm uses password protection for its tape volumes. |
| TAPESPANSIZE(500) | DFSMShsm can leave unused up to 500 megabytes (MB) of tape during attempts to eliminate spanning data sets. |
| TAPEUTILIZATION PERCENTFULL(97) | DFSMShsm forces an end-of-volume on a backup or migration tape volume when it is 97% full. |
| TAPEUTILIZATION CAPACITYMODE(COMPATIBILITY) | If you do not specify CAPACITYMODE(EXTENDED) for an esoteric capable of CAPACITYMODE switching, the drives operate in CAPACITYMODE(COMPATIBILITY) for output. The drives use CAPACITYMODE(COMPATIBILITY) or CAPACITYMODE(EXTENDED) as necessary for input. |
| UNITNAME(3590-1) | CDSVERSIONBACKUP: The default value is read from the multiple-host
processor control record (MHCR). The record is updated with values
specified on the SETSYS CDSVERSIONBACKUP command every time the command
is issued. If the MHCR record does not exist, or the parameter (or
subparameter) has never been specified, DFSMShsm uses a unit of 3590-1
to allocate scratch tapes during backup. UNITNAME: DFSMShsm uses a unit of 3590-1 to allocate scratch tapes during backup. |
| USECYLINDERMANAGEDSPACE(N) | Cylinder-managed space is not used for migration copies and backup versions. For allocation, DFSMShsm does not specify an EATTR value. |
| VERSIONS(2) | DFSMShsm keeps two backup versions of each data set. |
| VOLCOUNT(NONE) | The default is NONE and DFSMShsm does not pass the VOLCOUNT parameter to DFSMSdss. |
| VOLUMEDUMP(NOCC) | Concurrent copy will not be used by DFSMSdss when dumping volumes. |
| ZCOMPRESS(NONE) | The default is NONE and the SETSYS COMPACT settings will be used. |