Error Recovery; Figure 6. Command Summary - Seagate ST251N Product Manual

FIGURE 6: Command Summary
Op.Code Description
OOH
Test Unit Ready
01H
Rezero Unit
03H
Request Sense
04H
Format Unit
07H
Reassign Blocks
08H
Read
OAH
Write
OBH
Seek
11H
Read Usage Counter
12H
Inquiry
15H
Mode Select
16H
Reserve
17H
Release
1AH
Mode Sense
1BH
Start/Stop
1DH
Send Diagnostic
25H
Read Capacity
28H
Read
2AH
Write
2BH
Seek
2FH
Verify
37H
Read Defect Data
3BH
Write Buffer
3CH
Read Buffer
ESH
Read Long
E6H
Write Long
2.4 ERROR RECOVERY
The controller provides error recovery routines which are necessary
to assure data integrity. These techniques include ECC, seek-retry,
read-retry, head-offset and defect management. To assure a high de-
gree of data reliability, the controller utilizes a 32-bit error checking
and correction polynomial.
ST251Nl277N Product Manual, Rev. B
2-3