Identify Drive Command (Ec H ) - Seagate ST3660A - Medalist 545 MB Hard Drive Product Manual

Medalist XE Family Product Manual, Rev. B
3.3.1 Identify Drive command (EC
The Identify Drive command transfers information about the drive to the
host after power up. The data is organized as a single 512-byte block of
data. The block's contents are shown in the table below. All reserved bits
or words must be set to zero. Parameters listed with an "x" are drive-spe-
cific or vary with the state of the drive.
The sector buffer parameters for ST3295A and ST3660A drives are listed
in the table below. For a complete description of the Identify Drive
command, see the Seagate ATA Interface Reference Manual , publication
number 36111- xxx .
Word Description
0 Configuration information
Bit 10: 1 = disc transfer
greater than 10 Mbits/sec
Bit 6: 1 = fixed drive
Bit 4: 1 = head switch time
> 15 sec
Bit 3: 1 = not MFM encoded
Bit 1: 1 = hard-sectored disc
Number of fixed cylinders
1
1
(default logical emulation)
2
ATA reserved
Number of heads (default)
3
Number of unformatted bytes
4
per track
Number of unformatted bytes
5
per sector
Number of sectors per track
6
(default logical emulation)
ATA reserved (vendor-
7–9
unique)
continued
1. The ST3660A default cylinder count is 1,057. Some DOS and BIOS
combinations do not support more than 1,024 cylinders. You can
format the drive using 1,024 cylinders, which limits the accessible
capacity to 528 Mbytes, or use one of the solutions listed on page 2 to
access the drive's full capacity.
23
)
H
Value
045A
H
ST3295A: 2F9
H
ST3660A: 421
H
0000
H
ST3295A: E
H
ST3660A: 10
H
8D90
H
0248
H
ST3295A: 32
H
ST3660A: 3F
H
0000
H