Message Descriptions › Messages 2200-2299 › 2210

2210

REBLOCKING CANNOT BE DONE FOR DSN (ddd): REASON - (ttt)

Reason:

One of the following explanations applies:

• System CVOL catalogs have predefined formats. This format must be maintained in order for the catalog to continue to function correctly.
• Record format is neither FB nor VB. Only those data sets, which are currently of a blocked format, can be reblocked. Unblocked data sets are not converted to blocked, because application programs may not be designed to handle a block of records where previously only a single record was retrieved.
• Logical records span physical blocks. Support for reblocking data sets with the SPANNED attribute is not provided.
• Either logical record or block size is zero. Zero lengths cannot be used to determine new blocking factors to arrive at a new block size.
• Directory attributes imply it is a load library. One or more members of the PDS has user TTR fields, which implies that the PDS is a load library. Load libraries have special record format requirements, which are not supported for reblocking.
• No reblocking table entry applies. The reblocking table allows for new block size values to be specified for various combinations of device types, data set organizations and record formats. An entry cannot be found that applied to the device type, DSORG, and RECFM of the named data set.
• No entry in device-dependent table for overhead. Reblocking requires knowledge of the number of overhead bytes used for each data block written on each different device type. This value cannot be obtained for the device the named data set resides on.
• Logical record length exceeds block size limit. The maximum block size to be used for this data set is smaller than a single logical record, which prevents reblocking.
• Logical record length plus 4 exceeds BLKSZ limit. Similar to the previous explanation, except that the data set has variable-length records rather than fixed, which requires that the block size be at least 4 bytes larger than the maximum logical record.