Specification
General Feature Set
FLUSH CACHE (E7h)
This command is used by the host to request the device to flush the write cache. If there is data in the write cache, that
data shall be written to the media. The BSY bit shall remain set to one until all data has been successfully written or an
error occurs.
IDENTIFY DEVICE (ECh)
This commands read out 512 Bytes of drive parameter information. Parameter Information consists of the
arrangement and value as shown in the following table. This command enables the host to receive the Identify Drive
Information from the device.
Identify Device Information Default Value
Word Address
Default value
(Hex)
Total Bytes
Data Field Type Information
0 0x044A 2 General
configuration
1
0xXXXX
2 Default
number
of
cylinders
2 0x0000 2 Reserved
3 0x00XX 2 Default
number
of
heads
4-5
0x02400000
4 Obsolete
6 0xXXXX 2 Default
number
of
sectors
per
track
7
-
8 0xXXXXXXXX
4
Number
of
sectors
per
card
(Word
7
=
MSW,
Word
8
=
LSW)
9 0x0000 2 Obsolete
10
-
19 0xXXXX 20 Serial
number
in
ASCII
(Right
justified)
20 0x0002 2 Obsolete
21 0x0002 2 Obsolete
22 0x0000 2 Obsolete
23
-
26 0xXXXX 8
Firmware
revision
in
ASCII.
Big
Endian
Byte
Order
in
Word
27
-
46 0xXXXX 40
Model
number
in
ASCII
(Left
justified).
Big
Endian
Byte
Order
in
Word.
47 0x8001 2 Maximum
number
of
sectors
on
Read/Write
Multiple
command
48 0x0000 2 Reserved
49 0x0F00 2 Capabilities
50 0x0000 2 Reserved
51 0x0200 2 PIO
data
transfer
cycle
timing
mode
52 0x0000 2 Obsolete
53 0x0007 2 Field
validity
54 0xXXXX 2 Current
numbers
of
cylinders
55 0xXXXX 2 Current
numbers
of
heads
56 0xXXXX 2 Current
sectors
per
track
57
-
58 0xXXXX 4
Current
capacity
in
sectors
(LBAs)
(Word57
=
LSW
,
Word58
=
MSW)
59 0x0000 2 Multiple
sector
setting
60
-
61 0xXXXX 4 Total
number
of
sectors
addressable
in
LBA
Mode
Word
Address
Default value
(Hex)
Total Bytes
Data Field Type Information