The MEDSIZE record defines the threshold size for medium-size minidisks.
If the MEDSIZE value is larger (in kilobytes) than that specified for large minidisks (BIGSIZE), VMRMUA reverts to the 75th percentile default value. If the BIGSIZE value is less than 50 percent larger than MEDSIZE, VMRMUA reverts to the default values for both of these records.
The MEDSIZE record is used with the MEDUPD and MEDUTIL records to specify selection criteria for medium-size minidisks. The syntax is as follows:
MEDSIZE [ “Parms” ] Parms: 75 | percentile | nnnnK | nnM | blknum FB-512 | cylnum devtupe
- percentile
Specifies the medium-size minidisk threshold by a percentile ranking. The smallest allowable value is 50. The default is the 75th percentile. VMRMUA compares the sizes of all minidisks and identifies medium-size minidisks as those equal to or larger than percentile percent of all minidisks. - nnnnK
Specifies the medium-size minidisk threshold in kilobytes. This is expressed as nnnnK, where nnnn specifies that medium minidisks are those that occupy nnnn kilobytes or more. - nnM
Specifies the medium-size minidisk threshold in megabytes. This is expressed as nnM, where nn specifies that medium-size minidisks are those that occupy nn megabytes or more. - blknum FB-512
Specifies the medium-size minidisk threshold in FB-512 blocks. This is expressed as nnnnn FB-512, where nnnnn specifies that medium-size minidisks are those that occupy nnnnn FB-512 blocks or more. - cylnum devtype
Specifies the medium-size minidisk threshold in cylinders on a CKD-type DASD volume. This is expressed as mm nnnn, where mm specifies that medium-size minidisks are those that occupy mm cylinders or more and nnnn specifies the actual device type, such as 3390.
Examples
- To define a medium-size minidisk as one in the 70th percentile, change the MEDSIZE record to:
MEDSIZE 70
- To define a medium-size minidisk as one which occupies 200 kilobytes or more, change the MEDSIZE record to:
MEDSIZE 200K
- To define a medium-size minidisk as one which occupies two megabytes or more, change the MEDSIZE record to:
MEDSIZE 2M
- To define a medium-size minidisk as one that occupies 4,000 FB-512 blocks or more on an FBA-type DASD volume, change the MEDSIZE record to:
MEDSIZE 4000 FB-512
- To define a medium-size minidisk as one that occupies 7 cylinders or more on a 3390-type DASD volume, change the MEDSIZE record to:
MEDSIZE 7 3390