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This is the section for Storage Group Construct information. These
records are collected when SMSDATA is selected, and Storage Group
constructs are defined to the control data set selected. The record
type for this record is 'SG'. - Name
- Description
- DSGNMFLD
- The Storage Group Construct name.
- DSGNMLEN
- The length of this construct name.
- DSGNAME
- The name of this construct.
- DSGUSER
- The USERID of the last person to make a change to this construct.
- DSGDATE
- The date that this construct was last changed. The format is "YYYY/MM/DD"
in EBCDIC.
- DSGTIME
- The time that this construct was last changed. The format is "HH:MM"
in EBCDIC.
- DSGDESC
- The description of this construct.
- DSGEXNLN
- Length of storage group extend name from 0 to 30. Valid only when
DCUVERS is two or higher.
- DSGEXNM
- Storage group extend name, valid only when DCUVERS is two or higher,
and DSGEXNLN is nonzero.
- DSGSBKPT
- The EAV breakpoint value. The breakpoint value is used in determining
whether a data set can be allocated in a cylinder-managed space.
- DSGSHTHR
- High threshhold percent for the track-managed portion of the volume.
- DSGSLTHR
- Low threshhold percent for the track-managed portion of the volume.
- DSGDATAE
- The end of the storage group data.
- DSGFLAGS
- Storage Group Flags. The following are indicated if the specified
bit is '1'.
- DSGFABUP
- This bit indicates that the data sets on the volumes in this Storage
Group are eligible for automatic backup.
- DSGFAMIG
- This bit indicates that the data sets on the volumes in this Storage
Group are eligible for automatic migration.
- DSGFADMP
- This bit indicates that this Storage Group can be automatically
backed up using DFSMShsm, or a comparable product. Dumping whole
volumes instead of individual data sets speeds up the process of restoring
data sets to volumes.
- DSGFTHRS
- This flag indicates that thresholds have been specified for this
Storage Group.
- DSGFGBKU
- This flag indicates that the maximum number of days between backups
has been specified.
- DSGGBNOL
- This flag indicates that the maximum number of days between backups
has no limit.
- DSGFIMIG
- This flag indicates that the data sets in this Storage Group are
eligible for interval migration. DSGFHTHR and DSGFLTHR must be specified.
- DSGFPSM
- This flag indicates systems features. See constants for DBCSYSFT
in Table 13.
- DSGFTYPE
- This field denotes the type of storage group to which the volumes
belong. This field is mapped by the constants DSGPOOL, DSGVIO, DSGDUMMY,
DSGOBJ, and DSGOBJBK.
- 0
- Storage Group type is POOL.
- 1
- Storage Group type is VIO.
- 2
- Storage Group type is DUMMY.
- 3
- Storage Group type is OBJECT.
- 4
- Storage Group type is OBJECT BACKUP.
- DSGFHTHR
- This field is the high threshold, or the percentage of a single
volume in the Storage Group at which DFSMShsm will migrate data sets
off all the volumes if any of them meet or exceed this value. Processing
continues on each volume until either the volume occupancy meets or
goes below the value in DSGFLTHR or no more data sets on the volume
are eligible for migration. This value is not used during automatic
migration. Possible values range from 0 to 99.
- DSGFLTHR
- This field is the low threshold value. During interval and automatic
migration, this value is used as the target for the percentage of
space allocated on each volume in the storage group. DFSMShsm will
migrate eligible data sets off a volume until either the space allocated
on the volume drops to or below this value, or no more data sets on
the volume are eligible to be migrated. This value is ignored if DSGFAMIG
is '0'. Possible values range from 0 to 99.
- DSGFVMAX
- This field shows the largest size of a virtual input/output (VIO)
data set, in kilobytes, that you can create for this storage group.
You cannot allocate data sets that exceed this field in this Storage
Group. This value applies to VIO storage groups only.
- DSGFVUNT
- The value in this field shows the type of physical device that
will be simulated by the Storage Group. At least one unit of the device
type shown must be physically connected to each system that has access
to the storage group. This value appears for VIO Storage Groups only.
- DSGDMPCL
- The five elements in this array show the names of the dump classes
assigned to this Storage Group.
- DSGFRPST
- The 32 elements in this array show status of this Storage Group
by processor. Each element can be referenced by using DSGSTAT.
- DSGSTAT
- This field shows the status of the Storage Group on a given processor
and is mapped by the constants DSG0, DSGENBL, DSGQUI, DSGQUIN, DSGDIS
and DSGDISN.
- 0
- No status is specified.
- 1
- Storage Group status is enabled. A relationship that allows a
system to allocate and access data sets in a VIO Storage Group, a
pool Storage Group, or individual volumes within a pool Storage Group.
- 2
- Storage Group status is quiesce all. A relationship that prevents
a system from scheduling jobs that allocate or access data sets in
a VIO Storage Group, a pool Storage Group, or individual volumes within
a pool Storage Group.
- 3
- Storage Group status is quiesce new. A relationship that prevents
a system from scheduling jobs that allocate new data sets or modify
existing ones in a VIO Storage Group, a pool Storage Group, or individual
volumes within a pool Storage Group.
- 4
- Storage Group status is disable all. A relationship that prevents
a system from allocating or accessing data sets in a VIO Storage Group,
a pool Storage Group, or individual volumes within a pool Storage
Group.
- 5
- Storage Group status is disable new. A relationship that prevents
a system from allocating new data sets in a VIO Storage Group, a pool
Storage Group, or individual volumes within a pool Storage Group.
- DSGABSYS
- This field shows the name of the system on which automatic backup
of the volumes in this Storage Group will take place.
- DSGADSYS
- This field shows the name of the system on which automatic dumping
of the volumes in this Storage Group will take place.
- DSGAMSYS
- This field shows the name of the system that will perform automatic
migration and space management of the volumes in this Storage Group.
- DSGCNFRM
- The eight elements of this array show the confirmed SMS status
of this Storage Group. Each element can be referenced by DSGCSMSS.
- DSGCSMSS
- This field shows the confirmed SMS status of the storage group
and maps to the same values as DSGSTAT.
- DSGGBKUF
- The value in this field indicates the maximum number of days between
backups. During this backup period, a copy of each data set in the
Storage Group is available. This field is valid only for Pool Storage
Groups.
- DSGTBLGR
- This field shows the OAM table space identifier for this Storage
Group in the form GROUPnn.
- DSGOAMFL
- This field shows the OAM flags for this Storage Group.
- DSGFCYS
- This flag indicates whether or not the start and end times when
the OAM Storage Management Component (OSMC) can automatically start
its storage management processing for this Storage Group.
- 1
- These values have been given, see DSGCYLST and DSGCYLED.
- 0
- These values have not been given.
- DSGFVLFT
- This flag indicates whether or not the number of free sectors
required for an optical volume within this Storage Group has been
specified.
- 1
- This value has been given, see DSGVOLFT.
- 0
- This value has not been given.
- DSGFDRST
- This flag indicates whether or not the maximum number of object
write requests outstanding for an optical drive in this Storage Group
has been given.
- 1
- This value has been given, see DSGDRVST.
- 0
- This value has not been given.
- DSGVFFER
- This flag indicates whether or not a "mark volume full on first
write failure" criteria has been specified for this Storage Group.
- 1
- This value has been specified, see DSGVFERR.
- 0
- This value has not been specified.
- DSGVFERR
- This flag indicates whether or not a "mark volume full on first
write failure" criteria applies to optical volumes in this Storage
Group.
- 1
- This value indicates that OAM marks an optical volume full the
first time an attempt to write an object on the optical volume is
unsuccessful because there is not enough space remaining.
- 0
- This value indicates that OAM marks an optical volume full only
when the number of available sectors in the user data area falls below
the volume full threshold specified in DSGVOLFT.
- DSGFRETP
- This flag indicates whether ‘Retention Protection’ is enabling
for a given object. When it is enabled, OAM will not allow that object
to be deleted prior to its expiration date. Additionally, OAM will
not allow the expiration date to be changed to an earlier date. It
will, however, allow the expiration date to change to a later date.
- 1
- The Retention Protection is enabling.
- 0
- The Retention Protection is disabling.
- DSGFDELP
- This flag indicates whether ‘Deletion Protection’ is enabling
for a given object. When it is enabled, OAM will not allow that object
to be deleted prior to its expiration date. Deletion-Protection is
differs from Retention-Protection in that the Deletion-Protection
can be turned on and off by the installation, and Deletion-Protection
has no restriction on the expiration date changing.
- 1
- The Deletion-Protection is enabling.
- 0
- The Deletion-Protection is disabling.
- DSGCYLST
- This field shows the beginning of a window of time in which the
Object Access Method can begin storage management processing. The
actual value this field represents is an hour of the day on a 24-hour
scale. This value is valid only for the OBJECT Storage Group type.
Possible values range from 0 to 23.
- DSGCYLED
- This field shows the end of a window of time in which the Object
Access Method can begin storage management processing. The actual
value this field represents is an hour of the day on a 24-hour scale.
This value is valid only for the OBJECT Storage Group type. Possible
values range from 0 to 23.
- DSGVOLFT
- This field shows the number of free sectors required for an optical
volume within this storage group. When the number of free sectors
falls below the threshold, the Object Access Method marks the optical
volume as full. This value is valid only for the OBJECT and OBJECT
BACKUP Storage Group types.
- DSGDRVST
- This field shows the maximum number of object write requests outstanding
for an optical drive in this storage group. When the number of object
write requests to this storage group divided by the number of optical
disk drives currently processing requests for this storage group exceeds
this threshold, the Object Access Method attempts to start an additional
optical disk drive. This value is valid only for the OBJECT and OBJECT
BACKUP Storage Group types.
- DSGOLIBS
- These eight array elements list the library names that represent
defined optical drive configurations available for this storage group,
or a pseudo-library name that represents stand-alone optical drives
and shelf-resident optical volumes. This array is valid for OBJECT
and OBJECT BACKUP Storage Group types only. Each element can be referenced
by DSGOLBNL and DSGOLBNM.
- DSGOLBNL
- Optical library name length.
- DSGOLBNM
- Optical library name.
- DSGSSTAT
- This field shows status by processor, and can have up to 32 system
status entries.
- DSGSYSST
- Requested system status. Similiar to DSGSTAT.
- DSGCNSMS
- Confirmed SMS status. Similar to DSGCSMSS.
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