Product manual

6 Product Manual - Hawk 2 Family (Wide bus) SCSI-2 (Volume 1), Rev. A

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4.2 Unformatted and formatted capacities

Formatted capacity depends on the number of spare reallocation sectors reserved and the number of bytes

per sector. The following table shows some typical formatted capacities.

Spare Sectors or Cylinders ST12400W/WD/WC

Reserved for reallocation 512* 1024*

No Spares 2165 2279

12 Spare Sectors per cyl.

2 Spare Cylinders per Unit** 2148 2245

One Spare Sector per cyl.

2 Spare Cyl. per Unit** 2162 2275

Unformatted Capacity 2537

*Bytes per sector. Sector size selectable at format time. Users having the necessary equipment may modify

the data block size before issuing a format command and obtain different formatted capacities than those

listed. User available capacity depends on spare reallocation scheme selected. See Mode Select Command

and Format Command in the SCSI Interface Product Manual P/N 77738479.

**Spare cylinders are on the inner tracks.

The standard OEM model is as follows:

Formatted Data Block Size* Unformatted

512 Byte/Sector

ST12400W/WD/WC 2148 MB 2537 MB

*Twelve spare sectors per cylinder (all 12 spare sectors are on one track), two spare cylinders/unit.

4.3 Options (factory installed)

The capacities shown in paragraph 4.2 are available upon request. Other capacities can be ordered depend-

ing on sparing scheme and sector size requested.

The following options are incorporated at the time of production. See Section 12.0.

• Front panel (green LED) - See Figure 3.0-1

• Installation Guide P/N 77767465

• 1 MB data buffer

4.4 Optional accessories (user installed)

The following accessories are available. All kits may be installed in the field. See Section 13.0.

• Front Panel Kit (with green LED) - See Figure 3.0-1

• Single Unit shipping pack kit

• Installation Guide P/N 77767465

• Adapter Accessory Frame Kit P/N 75790701 (adapts 3.5-inch ST12400W/WD drive to fit in 5.25-inch drive

mounting space, does not work for model ST12400WC).