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The status and condition of the 3330 is reported in the
sense bytes. There are 24 bytes and seven different formats,
0-6. Four formats, 1, 4, 5, and 6 describe the 3330. The
remaining three formats, 0, 2, and 3 are associated with the
storage control. Only the formats dealing with the 3330
are explained. Refer to the following manuals for formats
0, 2, 3, and a detailed description of Unit Status.
• Reference Manual fo.r Integrated Storage Control,
Order No. GA26-1620.
• Reference Manual for 3830 Model 2 Storage Control,
Order No. GA26-1617.
Some sense byte formats may vary for the different attach-
ment methods. Therefore, the 3330 user should also order
companion manuals in order to have a complete set of sense
byte information. The following manuals are recommended
for S/370 models ll5, 125, and 135 users:
• IBM System/370 Model 115 Functional Characteristics,
Order No. GA33-1510.
• IBM System/370 Model 125 Functional Characteristics,
Order No. GA33- l 506.
• IBM System/370 Model 135 Functional Characteristics,
Order No. GA33-3005.
SENSE BYTE SUMMARY
Page of GA26-1615-3
Revised August 19, 1974
By TNL:
GN26-0310
SENSE DATA
In all the
format~,
the first eight bytes, 0-7, give high-level
information concerning status and condition. Sense byte 7
identifies the format in which the remaining bytes, 8 through
24, are arrayed as follows:
• Bits 0-3 =The format array of bytes 8-24
0
1
2
3
Format
0
0
0
1
-,
0
1
0
0
4
0
1
0
1
5
0
1
1
0
6
Byte
7
• Bits 4- 7 =Define a message.
-
4
5
6
7
Message
0
0
0
0
0
~ ~
i
+
!
1
1
1
1
F
Each of the formats 1, 4, 5, and 6 (including the possible
messages) is summarized in the charts on the following pages.
Sense Data 19
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