Fujitsu MAN3367 User Manual

C141-E124-01EN

4 - 20

a.

Cylinder count

This parameter specifies the total number of cylinders configured in the user space on the disk
media.  This value includes the number of cylinders for alternate blocks specified in the
"Alternate Track Count/Drive" parameter of the format parameters (Page code = 3).
It is impossible to change this parameter.

b. Number of heads

This parameter indicates the number of data Read/Write heads in the disk drive.  It is
impossible to change this parameter.  If zero or a value which differs from the "Default" value
is specified in this parameter field, the IDD performs rounding processing of the parameter,
setting a value which is the same as the default value in it.

c.

Bytes 6 to 16

The parameter defined in bytes 6 to 16 of this page descriptor is a parameter that it is clearly
not necessary for the INIT to specify.  The IDD disregards the values specified in this field.

d. RPL  (rotational position locking)

These bits are used for rotational synchronization of the disk and can be specified.  The IDD
disregards the value specified in this field.

e.

Rotational synchronization offset

This is a field which specifies the offset value used for rotational synchronization of the disk,
but it is not supported in the IDD.  The IDD disregards the value specified in this field.

f.

Rotational speed

This specifies the disk's rotational speed in rpm (rotations/minute).  This parameter cannot be
changed by the INIT.  The IDD disregards the value specified in this field and operates
according to the “Default” value.