NOTE: You can use the YKDROP command to drop the REXX variables in any Host-Discovered
Array Index structure that was loaded by using the YKLOAD command.
Table 147 (page 333) shows the Host-Discovered Array Index structure. The prefix for the name of
the Host-Discovered Array Index structure is one of the following:
• When the YKLOAD command is used for creating the structure: HCC.HDA.
• When the YKSCAN command is used for creating the structure:
stem-name-specified-in-ARRAYS-parameter
Each REXX variable is preceded by a period (.).
Table 147 Host-discovered Array Index Structure
DescriptionREXX variables
Number of storage systems (number of n)0
Serial number of a scanned storage systemSerialNumn
1
Device Address Domain IDDADID
Value specified to stem-name for Host-Discovered Array structure,
excluding the trailing period.
Prefix
Map information acquired from CU numberCUMap
Map information acquired from CCACCAMapCUxx
2
Command device map informationCDEVMap
1 Created for each SN (storage system serial number), thus index information for each device connected to the host is
created.
2 Created for each CU, thus the device index information is created for each defined CU (CU number). The xx in CUxx
is a hexadecimal value.
Example of CUMap:
For CUMap, 1 is assigned to the area that conforms to the CU number.
When defined CU number is 00, 01, 03, and 05, the value for CUMap is 11 1 1.
Example of CCAMap:
For CCAMap, 1 is assigned to the area that conforms to the CCA.
When defined CCA is 01, 02, 05, and 06, the value for CCAMap is 11 1 1.
Example of CUxx:
If 11 1 1 is set to CCAMap of CU=05, the value for CU05.CCAMap is 11 1 1.
stem-name is fixed so that the YKLOAD command and the YKSTORE command can access the structure.
Host-discovered Array Structure
The Host-Discovered Array structure is created by using one of the following methods:
• Executing the YKLOAD command to load copy groups, so that the disk configuration definition
file will be converted to the Host-Discovered Array structure.
• Executing the YKSCAN command, so that the scanned information will be converted to the
Host-Discovered Array structure with a prefix specified in the STEM parameter.
The YKSTORE command saves the Host-Discovered Array structure to the configuration file.
NOTE: You can use the YKDROP command to drop the REXX variables in any Host-Discovered
Array Structure that was loaded by using the YKLOAD command.
The information in the Host-Discovered Array Index structure is used for referring to the
Host-Discovered Array structure. For the structure, see “Host-discovered Array Index Structure”
(page 332).
About REXX Variable Structures 333
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