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118
Western Digital Hard Disk Drive OEM Specification
11
Command Descriptions
Protocol
Com m and
Code
Binary Code Bit
(Hex)
7
6
5
4
3
2
1
0
3
Check Pow er Mode
E5
1
1
1
0
0
1
0
1
3
Check Pow er Mode*
98
1
0
0
1
1
0
0
0
3
Configure Stream
51
0
1
0
1
0
0
0
1
3
Crypto Scramble Ext
B4
1
0
1
1
0
1
0
0
3
Device Configuration Restore
B1
1
0
1
1
0
0
0
1
3
Device Configuration Freeze Lock
B1
1
0
1
1
0
0
0
1
1
Device Configuration Identify
B1
1
0
1
1
0
0
0
1
2
Device Configuration Set
B1
1
0
1
1
0
0
0
1
2
Dow nload Microcode
92
1
0
0
1
0
0
1
0
3
Execute Device Diagnostic
90
1
0
0
1
0
0
0
0
3
Flush Cache
E7
1
1
1
0
0
1
1
1
3
Flush Cache Ext
EA
1
1
1
0
1
0
1
0
2
Format Track
50
0
1
0
1
0
0
0
0
1
Identify Device
EC
1
1
1
0
1
1
0
0
3
Idle
E3
1
1
1
0
0
0
1
1
3
Idle*
97
1
0
0
1
0
1
1
1
3
Idle Immediate
E1
1
1
1
0
0
0
0
1
3
Idle Immediate*
95
1
0
0
1
0
1
0
1
3
Initialize Device Parameters
91
1
0
0
1
0
0
0
1
3
NCQ NON-DATA
63
0
1
1
0
0
0
1
1
3
Overw rite Ext
B4
1
0
1
1
0
1
0
0
1
Read Buffer
E4
1
1
1
0
0
1
0
0
4
Read DMA
C8
1
1
0
0
1
0
0
0
4
Read DMA
C9
1
1
0
0
1
0
0
1
4
Read DMA Ext
25
0
0
1
0
0
1
0
1
5
Read FPDMA Queued
60
0
1
1
0
0
0
0
0
1
Read Log Ext
2F
0
0
1
0
1
1
1
1
4
Read Log DMA Ext
47
0
1
0
0
0
1
1
1
1
Read Multiple
C4
1
1
0
0
0
1
0
0
1
Read Multiple Ext
29
0
0
1
0
1
0
0
1
3
Read Native Max Address
F8
1
1
1
1
1
0
0
0
3
Read Native Max Address Ext
27
0
0
1
0
0
1
1
1
1
Read Sector(s)
20
0
0
1
0
0
0
0
0
1
Read Sector(s)
21
0
0
1
0
0
0
0
1
1
Read Sector(s) Ext
24
0
0
1
0
0
1
0
0
4
Read Stream DMA Ext
2A
0
0
1
0
1
0
1
0
4
Read Stream Ext
2B
0
0
1
0
1
0
1
0
3
Read Verify Sector(s)
40
0
1
0
0
0
0
0
0
3
Read Verify Sector(s)
41
0
1
0
0
0
0
0
1
3
Read Verify Sector(s) Ext
42
0
1
0
0
0
0
1
0
3
Recalibrate
1x
0
0
0
1
-
-
-
-
3
Sanitize Freeze Lock Ext
B4
1
0
1
1
0
1
0
0
3
Sanitize Status Ext
B4
1
0
1
1
0
1
0
0
Table 95 Command Set