6 Product Manual - Hawk 1LP Family SCSI-2 (Volume 1), Rev. C
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4.3
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
ST31200N/ND/NC
ST3620N/NC
Reserved for reallocation
MB
MB
512[1]
1024[1]
512[1]
1024[1]
No Spares
1068.27
1145.7
553.1
584.3
Nine Spare Sectors Per Cylinder [2]
1055.28
1120.29
545.9
570.2
2 Spare Cylinders per Unit [3]
One Spare Sector per cyl.
1066.33
1142.39
551.4
581.2
2 Spare Cyl. per Unit [3]
Unformatted Capacity
1258.8
651.8
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 nine spare sectors are on one track.
[3] Spare cylinders are on the two inner tracks.
The standard OEM model is as follows:
Formatted Data Block Size*
Unformatted
512 Byte/Sector
ST31200N/ND/NC
1055.28 MB
1258.8 MB
ST3620N/NC
545.9 MB
651.8 MB
*Nine Spare Sectors per cylinder (all nine spare sectors are on one track), Two spare cylinders/unit.
4.4
Options (factory installed)
The capacities shown in paragraph 4.3 are available upon request. Other capacities can be ordered depending
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 77767453
• 1 MB Data buffer
4.5
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 77767453
• Adapter Accessory Frame Kit P/N 75790701 (adapts 3.5-inch drive to fit in 5.25-inch drive mounting space)
