Emulex MD21/S2, Техническое руководство

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ESDI Disk Drive Preparation
The parameters shown in Table 4-1 are defined as follows:
Vendor/Model This indicates what company produced the drive and
the model of drive that was tested.
Rev This is the Revision number of date of manufacture
for the drive that was tested.
Sectors/Track This is the maximum number of sectors that can be
used. Note that the drive may not have switch or
jumper options capable of selecting this number of
sectors. If this is the case, the next smaller
value should be used.
Size This is the size in bytes for the data portion of
the sector.
Type
ISG
PLO
Bytes per
Track
This is the recommended type of sectoring (Used in
calculating this information). In some cases this
is also the only sectoring possible. The possible
types are:
Soft The controller determines format.
Hard The drive provides the sector pulses.
Imbedded The drive provides sector pulses but the
drive uses servo information from
between the sectors and not from a
separate Servo Track. This also
indicates that the Head Switch time will
be equal to a single track seek.
This is the minimum length required for the Inter-
Sector Gap as specified by the drive via the ESDI
request configuration command.
This is the minimum number of bytes required in
each of the Phase Lock Oscillator fields as
specified by the drive via the ESDI request
configuration command. One of these exits before
both the Header and Data fields.
This is the number of bytes guaranteed to be
present on a track on one surface (head) of the
drive as specified by the ESDI request
configuration command.
4-4 Drive Configuration Parameters