1. User's Guide
  2. Understanding STA Data
  3. Understand How STA Handles Changes to the Tape Environment
  4. How to Map Host and STA Drive Identifiers

How to Map Host and STA Drive Identifiers

STA does not know the host's logical device ID for a drive. To identify a drive, you must manually map the host drive identifiers to the STA identifiers such as drive serial number, World Wide Name (WWN), or physical location.

Mainframe Identifiers

Mainframe hosts use a four-digit hexadecimal drive ID (0000–FFFF) to identify a drive. To map the host identifiers to the STA identifiers, you can use Oracle's Enterprise Library Software (ELS) Display DRives command on the mainframe host. The IDEntity option lists the mainframe hexadecimal ID, serial number, and WWN for each drive. Following is an example of the command output.

Sample ELS Display DRives Command Output

DISPLAY DRIVES IDENTITY
.SLS4633I Display Drives Command 994
 DRIVE LOCATION MODEL WORLD WIDE NAME SERIAL NUMBER
 0A10 00:02:01:08 T9840D 50:01:04:F0:00:79:18:CD 5700GU008737
 0A11 00:02:01:09 T9840D 50:01:04:F0:00:79:18:C1 5700GU006080
 0B04 01:01:01:14 T9940B 50:01:04:F0:00:89:A7:74 479000025047
 0B05 01:02:01:14 T9940B 50:01:04:F0:00:89:A7:44 479000026693
 0B06 01:02:01:15 T1B35 50:01:04:F0:00:89:A7:68 572004003720
 0B07 01:02:01:11 T1B35 50:01:04:F0:00:89:A7:68 572004003720

You can issue this command from a variety of locations on the mainframe host, including the operator console or an SMCUUUI utility batch job. Optionally, you can save the output of the command to a.csv or .xml file. See the ELS Command, Control Statement, and Utility Reference manual for complete details about usage, syntax, and options.

Open Systems Identifiers

On open systems hosts (Linux and Solaris), logical device names for tape drives are found in the /dev/rmt directory. To map the host logical names to the STA identifiers, you can do a long listing (ls -l) of this directory. The command output shows the logical device name and the pointer to the raw device file, which includes the WWN for the drive. Following is an example of the output on Linux; the logical device name and WWN for each drive are highlighted in bold type.

Sample Linux /dev/rmt Directory Listing

# ls -l /dev/rmt
lrwxrwxrwx 1 root root 86 Jan 31 16:31 /dev/rmt/0cbn ->../../devices/pci@79,0/pci10de,377@a/pci1077,171@0/fp@0,0/tape@w500104f000b8050e,0:cbn
lrwxrwxrwx 1 root root 86 Jan 31 16:31 /dev/rmt/1cbn ->../../devices/pci@79,0/pci10de,377@a/pci1077,171@0/fp@0,0/tape@w500104f000b80511,0:cbn
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