Epson 3865X Plus - Manual (Page 254)

For the hard disk in the Equity 386SX PLUS, it is best to accept
the recommended skewed sector (also called the interleave
factor) of 1. For other hard disk drives, you may need to change
this value if the documentation that came with the hard disk
recommends a different number.
To accept the default, select Y.
To enter a new value, select N. You see the following prompt:
Enter new skewed sectors in
format (1-16):
Enter a number from 1 through 16 which equals the maximum
sector number for the drive minus 1. The maximum sector
number varies, depending on the drive type. Then press
Enter.
Next you see this prompt:
Accept recommended skewed sectors per
head in format : 0 ? (Y/N)
For an Epson hard disk drive, accept the recommended value
of 0. For another type of drive, use the value recommended in
the documentation for the drive.
To accept the default, select Y.
To enter a new value, select N. You see the following prompt:
Enter new skewed sectors per head
in format (0-16):
Enter a number from 0 through 16 which equals the maximum
sector number for the drive minus 1. The maximum sector
number varies, depending on the drive type. Then press
Enter.
C-6 Physically Formatting a Hard Disk