Use DASD space management to do the following:
- Select objects that require processing.
- Determine if they have expired by examining the objects’ explicit
expiration date or examining the objects’ management class information.
- Physically delete data for expired objects on DASD and on rewritable
optical disks.
- Remove the object directory entry (indicating volume serial number
and sector location and other object information) for the expired
object.
To start DASD space management:
- Enter the following command:
F OAM,START,DASDSM,storage-group-name
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- The system issues the following messages:
CBR9300I DASD Space Management starting for storage group storage-group-name.
CBR9301I DASD Space Management completed for storage group storage-group-name.
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- The following message appears if OAM is having some major problems
and cannot perform DASD space management on a storage group. This
message would be preceded by other CBRxxxxI messages:
CBR9043I DASD Space Manager not started for storage-group-name.
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If any errors occur during the DASD space management cycle, additional
messages might be issued identifying the error, and message CBR9043I
is not issued.
Note: If OAM detects that an object storage table or an object directory
is unable to extend its storage during normal processing of objects
using the OSREQ application interface, DASD space management is automatically
started for that storage group. If the table that runs out of extents
is the object directory, all object stores to that storage group fail
until more space is made available to the object directory for the
storage group. DASD space management is started automatically in this
instance so that subsequent stores to the storage group might have
improved chances of storing successfully.
For more information on these messages, see MVS System Messages.