Sense Information Summary - IBM System/360 Field Engineering Manual

2841 STORAGE CONTROL (Continued)
Sense Information Summary
Sense Bit:
Position
Byte 0
~
Byte 1
~
4
5
Byte 2
~
3
4
Condition
Command Reject includes Invalid Command, Invalid Sequence,
and File Protected.
Intervention Required
Bus Out Parity
Equipment Check
Data Check
Overrun
Track Condition Check
Seek Check
Data check in count field; also causes Byte 0, Bit 4
(Data Check) to be turned on.
Track Overrun. Indicated on Write.
End of Cylinder
Invalid Sequence also causes Command Reject (Byte 0, Bit 0)
to
be turned on.
No Record Found
File Protected also causes Command Reject (Byte 0, Bit 0)
Missing Address Marker also causes Data Check (Byte 0, Bit 4)
Overflow Incomplete
Unsafe
Not Used }
Serializer/Deseriali"zer Check
Not Used
ALU Check
Unselected Status
Also. turn on Equipment
Check Byte 0, Bit 3
Bit 2311 2321 2302 2303 2314
0
Ready Drive Ready Access Ready Busy
1 On Line Drive Access On Line
Operative Operative
2
Unsafe Read Safety Read Safety Unsafe
3
-----------
Write Safety
Write Safety
Not Used
4
On Line Strip Ready
On Line
On Line Pack Change
5
End of Cylinder Invalid Address
------------
End of Cylinder
6
-----------
Auto Restore
------------
Not Used
7 Seek CE Cell CE Cylinder Seek
Incomplete Located Located
Incomplete
This byte is all zeros. It is included for compatibility with other control units.
94 S/360
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