Seagate Spinpoint M8, Product Manual

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Spinpoint M8 Product Manual REV 2.6
50
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.
Table 8-5 IDENTIFY DEVICE information
Word Content Description
0 0040h
General configuration bit-significant information:
15 0=ATA device, set to 0
14-8 Retired
7 1=removable media device, set to 0
6 1=not removable controller and/or device, set to 1
5-3 Retired
2 Reserved
1 Retired
0 Reserved
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, 0 = not specified)
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)
47 8010h
15-8 80h
7-0 Maximum number of sectors that shall be transferred per interrupt on
READ/WRITE MULTIPLE commands
48 4000h Reserved
49 2F00h
Capabilities
15-14 Reserved
13 1=Standby timer values as specified in this standard are supported
0=Standby timer values shall be managed by the device
12 Reserved
11 1=IORDY supported
0=IORDY may be supported
10 1=IORDY may be disabled
9 LBA supported
8 DMA supported
7-0 Retired
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 Reserved