Table 8-5 Identify Device Information - Seagate Spinpoint M8 Product Manual

Some parameters are defined as a string of ASCII characters. For the string "Copyright," the character 'C' is
the first byte, 'o' is the 2nd byte, etc. When such fields are transferred, the order of transmission is:
1st character ('C') is on bits DD15 through DD8 of the first word
2nd character ('o') is on bits DD7 through DD0 of the first word
3rd character ('p') is on bits DD15 through DD8 of the second word
4th character ('y') is on bits DD7 through DD0 of the second word, etc.
Word Content
General configuration bit-significant information:
15
14-8
0 0040h
5-3
1 XXXXh Number of logical cylinders
2 0 Reserved
3 00XXh Number of logical heads
4-5 0 Retired
6 003Fh Number of logical sectors per logical track
7-8 0 Reserved for CFA
9 0 Retired
10-19 Serial number (20 ASCII characters,
20 0000h Retired
21 4000h Retired
22 0004h Number of ECC bytes (Device native length is selected via set feature command.)
23-26 Firmware revision (8 ASCII characters)
27-46 Model number (40 ASCII characters)
15-8
47 8010h 7-0
48 4000h Reserved
Capabilities
15-14
13
12
49 2F00h 11
10
7-0
50 4000h Capabilities
51 0200h PIO data transfer cycle timing mode (Obsolete)
52 0200h DMA data transfer cycle timing mode (Obsolete)
53 0007h 15-3
Spinpoint M8 Product Manual REV 2.6

Table 8-5 IDENTIFY DEVICE information

0=ATA device,
Retired
7 1=removable media device,
6 1=not removable controller and/or device,
Retired
2 Reserved
1 Retired
0 Reserved
80h
Maximum number of sectors that shall be transferred per interrupt on
READ/WRITE MULTIPLE commands
Reserved
1=Standby timer values as specified in this standard are supported
0=Standby timer values shall be managed by the device
Reserved
1=IORDY supported
0=IORDY may be supported
1=IORDY may be disabled
9 LBA supported
8 DMA supported
Retired
Reserved
Description
set to 0
set to 0
0 = not specified)
set to 1
50