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4.6 Packet Commands
C156-E205-01EN 4-67
When the ODD detects a CRC error involving the Ultra DMA transfer during the
data transfer using this command, it returns the CHECK CONDITION. (The
Sense Key of the Error register indicates ABORTED COMMAND.)
The original sense data at the CRC error occurrence is reported normally using the
REQUEST SENSE command. Otherwise, it will be reported when another
command is received.
The sense data format is shown in Table 4.100.
Table 4.100 Request sense data
Bit
Byte
76543210
0 Valid Error Code (70h or 71h)
1 Reserved (00h)
2 Reserved (0h) Sense Key
3-6 Information
7 Additional Sense Length (18h)
8-11 Command-Specific Information
12 Additional Sense Code
13 Additional Sense Code Qualifier
14 Reserved (00h)
15-17 Sense-key specific
18-31 Additional Sense Bytes
When the Valid bit is 1, the information field (bytes 3 to 6) is effective.
Error Code indicates the sense data format and type. See Table 4.101.
Table 4.101 Error code
Error Code Report timing
70h (Current error) Reported for a normal error.
71h(Deferred error) Reported when an error occurs in the command that accesses the write
cache when the write cache is enabled. If this sense data is reported, the
command that reported the Check Condition status is not executed.