User's Manual

HONEYWELL TAPES
XEROX LASER PRINTING SYSTEMS TAPE FORMATS MANUAL 10-5
Table 10-4. COBOL 1EOF, 1HDR, 1EOR labels (Honeywell 200/
2000 standard 120-character labeled tapes)
Name
Character
position(s)
Description
Label identifier 1-5 This is a 5-character identifier 1HDRb, 1EOFb, or 1EORb. 1HDRb denotes
the beginning-of-file. 1EOFb denotes the end of a completed file. 1EORb
denotes that the file continues onto another tape reel.
Reserved 6 Unspecified contents.
Expiration date 7-10 This is the number of days the tape is to be retained before it may be
scratched or overwritten (cccc in days).
Creation date 11-15 This is the date the file was created (yyddd where yy = year and ddd = day).
File identifier* 16-25 File name.
File sequence
number
26-30 This number is the same for all reels of a file, but is unique for each file.
Volume serial
number
31-35 This is the serial number unique to the physical tape reel.
Reserved 36 Unspecified contents.
Volume sequence
number*
37-40 This number identifies the order of processing for this particular reel within
the file.
Reserved 41-50 Unspecified contents.
System identifier 51-54 This identifies the operating system used to create this file.
Record structure 55 F indicates fixed format.
V indicates variable format.
Record length* 56-60 This is a number that indicates the record length in characters.
Block length* 61-65 This is a number that indicates the block length in characters.
Checkpoint indicator 66 Checkpoint indicator (IBM format).
Block count* 67-72 This is the number of data blocks contained on this reel of a file. This field is
processed from the 1EOF and 1EOR labels only.
Reserved 73-120 Unspecified contents.
* Used by the operating system.