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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
reserved for reallocation
No spares
Twelve spare sector per cylinder [2]
2 spare cylinders per Unit [3]
One spare sector per cylinder
2 spare cylinders per Unit [3]
Unformatted capacity
Notes.
[1] 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.
[2] All twelve spare sectors are on one track.
[3] Spare cylinders are on the two inner tracks.
The standard OEM model is as follows:
ST15230N/ND
*Twelve spare sectors per cylinder (all twelve spare sectors are on one track), two spare cylinders/unit.
Drives are shipped with an Installation Guide P/N 77767474 unless otherwise specified.
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
• Single Unit shipping pack
• Installation Guide P/N 77767474
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
• Adapter Accessory Frame Kit P/N 75790701 (adapts 3.5-inch drive to fit in 5.25-inch drive mounting
space)
Product Manual - Hawk 4 Family SCSI-2 (Volume 1), Rev. F
Formatted Data Block Size*
512 Byte/Sector
4294 MB
N/ND
MB
512 [1]
1024 [1]
4319
4596
4294
4546
4315
4590
5170
Unformatted
5170 MB
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