/etc/opt/SUNWmd/mddb.cf is used by the metainit command to find the locations of the metadevice state databases replicas. The metadb command creates the file and updates it each time it is run. Similar information is entered in the /etc/system file.
Each metadevice state database replica has a unique entry in the /etc/opt/SUNWmd/mddb.cf file. Each entry contains the driver and minor unit numbers associated with the block physical device where a replica is stored. Each entry also contains the block number of the master block, which contains a list of all other blocks in the replica.
Entries in the /etc/opt/SUNWmd/mddb.cf file are of the form:
driver_name minor_t master_block checksum
where driver_name and minor_t represent the device number of the physical device storing this replica. master_block is the block number of the master block used by this replica of the metadevice state database. checksum is used to make certain the entry has not been corrupted. A pound sign (#) introduces a comment.
#metadevice database replica location file do not hand edit
#driver minor_t daddr_t checksum
id 3 16 -182
id 67 16 -246
id 18 16 -197
id 82 16 -261
Solstice DiskSuite User's Guide, Solstice DiskSuite Reference