Request Sense - X'03'

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The Request Sense command is supported by the tape library. Table 1 shows the command format.

Table 1. Request Sense Command
Byte Bit 7

MSB

 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

LSB
0 Operation Code (X'03')
1 LUN (Obsolete) Reserved
2 Reserved
3 Reserved
4 Allocation Length
5 Vendor Specific (B'00') Reserved (B'0000') Flag (B'0') Link (B'0')
The following tape library-specific parameter applies:
  • Allocation Length: The maximum number of bytes to be transferred. This device has up to 78 bytes of sense data. If the allocation length specified is less, then the allocated amount is transferred, the remaining sense data is lost, and no error is reported. If the allocated length specified is greater, then only up to 78 bytes of sense data are transferred and no error is reported.