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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 512 byte sector size [1] formatted capacities.
Spare Sector or Cylinders
Reserved for reallocation
No Spares
Five Spare Sectors per Cylinder [2]
Nine Spare Sectors per Cylinder [2]
2 Spare Cylinders per Unit [3]
One Spare Sector per Cylinder and
2 Spare Cylinder per Unit [3]
Unformatted Capacity
Notes.
[1] 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 spare sectors are on one track.
[3] Spare cylinders are on the two inner tracks.
The standard OEM model is as follows:
ST32430N/ND
ST31230N/ND
* Sparing equivalent to one spare sector per head (all spare sectors are on one track), two spare cylinders/
unit.
Installation Guide P/N 77767473 is shipped with each drive unless otherwise requested.
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
• Single Unit shipping pack
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
• Adapter Accessory Frame Kit P/N 75790701 (adapts 3.5-inch drive to fit in 5.25-inch drive mounting space)
Product Manual - Hawk 2LP Family SCSI-2 (Volume 1), Rev. F
Formatted Data Block Size
512 Byte/Sector
2.14 GB*
1.06 GB*
ST32430N/ND
GB
2.16
2.14
2.16
2.16
2.59
Unformatted
2.59 GB
1.28 GB
ST31230N/ND
GB
1.07
1.06
1.07
1.06
1.28
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