Mainframe Enablers TimeFinder SnapVX and zDP 8.5 Product Guide

The section header is immediately followed by a variable number of section descriptors. The following DSECT describes the descriptor format.

**
* DSECT for the section descriptors - OFF/LEN/CNT fields
*
*  Currently, there are three: BASE, SYMM, DEV
**
EIPSMFDS              DSECT ,      Offsets are from EIPSMFD
EIPSMFDS_LEN           DS   F       Length of this structure
EIPSMFDS_OFF           DS   F       Offset of section
EIPSMFDS_COUNT         DS   F       Number of entries in section
EIPSMFDS_ID            DS   F       Section ID
EIPSMFDS_ID_BASE      EQU  1        . BASE section
EIPSMFDS_ID_SYMM      EQU  2        . SYMM section
EIPSMFDS_ID_DEV       EQU  3        . DEV section
EIPSMFDS_DSLN         EQU *-EIPSMFDS Section descriptor length

There are potentially three types of sections:

• Base section—contains general information describing the zDP environment.
• Symm section—contains entries for a variable number of storage systems.
• Device section (optional)—contains device information for each zDP managed device on the associated storage system.

Records always contain the Base and Symm data elements.

If the device data is not being recorded:

• Data for all managed storage systems are contained in one SMF record.
• The section descriptor for the Dev section has an offset and the number of entries set to zero.

If device data is available:

• Each record contains a Symm section for one storage system.
• The Device section contains the data for all devices under its control.