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ST3655 Family AT Drives Product Manual, Rev. A
1.0 Specifications
1.1 Formatted capacity
The drive is low-level formatted at the factory. You cannot low-level
format the drive.
Formatted capacity (Mbytes*)
Total sectors
* One megabyte equals one million bytes.
1.1.1 Recommended logical configuration
You can operate the drive using many different logical configurations,
provided the number of sectors per track does not exceed 256. However,
in DOS the number of sectors per track must be less than or equal to 63.
When establishing the logical configuration, set the number of sectors
per track and the number of heads to satisfy the following relationship:
≤
16
(sectors per track)(heads)
When you configure the drive in CMOS, the total sectors cannot exceed
the physical capacity of the drive. The total sectors is determined by the
following formula:
total sectors = (logical heads) (logical sectors per track) (logical cylinders)
To maximize the capacity of the drive, the following geometry is recom-
mended:
Cylinders
Read/write heads
Sectors per track
The drive is configured in translation mode. You can verify the number
of cylinders, sectors per track and heads by using the Identify Drive (EC
command. See Section 3.1.1 for details about the Identify Drive com-
mand.
ST3390A
ST3550A
341.311
452.415
666,624
883,624
≤
4,096
ST3390A
ST3550A
768
1,018
14
14
62
62
1
ST3655A
528.482
1,032,192
ST3655A
1,024
16
63
)
H
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