| 0 |
(0) |
2 |
CLASRC |
Header record identifier. Each bit
in this field is set to 1 unless critical data has been destroyed. |
| 2 |
(2) |
4 |
LOWLIMIT |
Address of low extent. Track address
(in CCHH format) of first extent of the logrec data set. |
| 6 |
(6) |
4 |
UPLIMIT |
Address of high extent. Track address
(in CCHH format) of last extent of the logrec data set. |
| 10 |
(A) |
1 |
MSGCNT |
Count of the number of times that
the LOGREC-full message (IFB040I) has been issued. The maximum number
is 15. |
| 11 |
(B) |
7 |
RESTART |
Address of record entry area and
the time stamp record. Starting track address (in BBCCHHR format)
for recording area on the logrec data set. |
| 18 |
(12) |
2 |
BYTSREM |
Remaining bytes on track. Number
of bytes remaining on track upon which last record entry was written. |
| 20 |
(14) |
2 |
TRKCAP |
Total bytes on track. Number of bytes
which can be written on a track of volume containing the logrec data
set. |
| 22 |
(16) |
7 |
LASTTR |
Address of last record written.
Track address (BBCCHHR format) of last record written on the logrec
data set. |
| 29 |
(1D) |
2 |
TRKSPER |
Highest addressable track for each
cylinder on volume containing the logrec data set. |
| 31 |
(1F) |
2 |
EWMCNT |
Warning count. Number of bytes remaining
on early warning message track of the logrec data set when 90% full
point of data set is reached. When this is detected by a recording
routine, it issues a message and turns on early warning message switch
at displacement 38. |
| 33 |
(21) |
1 |
DEVCODE |
Device code. Code indicating device
type of volume on which the logrec data set resides: - Code
- Device
- 04
- 2302
- 07
- 2305 Model II
- 09
- 3330 and 3333 Model I or 3350 operating in 3330-1 compatibility
mode.
- 0A
- 3340 and 3344
- 0B
- 3350 native mode
- 0C
- 3375
- 0D
- 3330 and 3333 Model II or 3350 operating in 3330-II compatibility
mode.
- 0E
- 3380
- 0F
- 3390 device.
|
| 34 |
(22) |
4 |
EWMTRK |
Early warning message track. Track
address (in CCHH format) on which 90% full point for data set exists. |
| 38 |
(26) |
1 |
EWMSW |
Switch byte: |
| 1... .... |
|
90% full point message has been issued.
This switch is turned on by recording routine detecting 90% full point
and is turned off by EREP when clearing the logrec data set to hexadecimal
zeros. |
| .xxx xxxx |
|
Reserved. |
| 39 |
(27) |
1 |
SFTYBYTS |
Check byte. Each bit in this field
is set to 1 and is used to check validity of header record identifier. |