Traditionally, D3 tapes have an identifying label written on the first 80 bytes of the tape. Labels contain up to 47 characters, depending on the length of the Timedate stamp and Platform ID
|
Tape |
Element |
Element |
|
Position |
Length |
Description |
|
-------- |
------- |
---------------------------------- |
|
01 |
01 |
Label Identifier. Always an "L". |
|
02 |
01 |
(space) |
|
03 - 06 |
04 |
Record Length (in hexadecimal) |
|
|
|
"01F4" = 500-byte record |
|
|
|
"03E8" = 1000-byte record |
|
|
|
"4000" = 16384-byte record |
|
07 |
01 |
(space) |
|
08 - 15 |
08 |
System Time at time of tape-writing. "00:00:00" format |
|
16 - 17 |
02 |
(spaces) |
|
18 - 28 |
11 |
System Date at time of tape-writing. "mmm dd yyyy" format |
|
29 |
01 |
(space) |
|
30 - 77 |
48 |
Label Header Text. |
|
78 |
01 |
(space) |
|
79 - 80 |
02 |
Tape volume (reel) number. |
|
-------- |
------- |
---------------------------------- |
If the tape is created:
• by using the t-dump command, the label contains the source file name and text specified in the t-dump heading option (if any).
• by a file-save, account-save, or save command, then it contains the word data, and optionally, the information entered at the file-save tape label: prompt.
• as spooler output, the label contains the word spooler, and optionally, the account name and user-ID of the creator.
|
NOTE— |
If the device label size does not match the tape (media) label size, the prompt below displays. In the event of a mismatch, you are prompted on the first reel. Device label size does not match tape label size. continue/quit? |
See Also