Seagate Cheetah 18LP, Product Manual, Page: 18 / 94

8 Cheetah 18LP Product Manual, Rev. F
3.5 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 the standard OEM model capacities:
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. See
Mode Select Command and Format Command in the appropriate SCSI Interface Product Manual.
[2] User available capacity depends on spare reallocation scheme selected, the number of data tracks per
sparing zone, and the number of alternate sectors (LBAs) per sparing zone.
3.6 Programmable drive capacity
Using the Mode Select command, the drive can change its capacity to something less than maximum. See the
Mode Select Parameter List table in the appropriate SCSI Interface Product Manual. Refer to the Parameter list
block descriptor number of blocks field. A value of zero in the number of blocks field indicates that the drive
shall not change the capacity it is currently formatted to have. A number in the number of blocks field that is
less than the maximum number of LBAs changes the total drive capacity to the value in the block descriptor
number of blocks field. A value greater than the maximum number of LBAs is rounded down to the maximum
capacity.
3.7 Factory installed accessories
OEM Standard drives are shipped with the Cheetah 18LP Installation Guide, part number 83329410 (unless
otherwise specified). The factory also ships with the drive a small bag of jumper plugs used for the J2, J5, and
J6 option select jumper headers.
3.8 Options (factory installed)
All customer requested options are incorporated during production or packaged at the manufacturing facility
before shipping. Some of the options available are (not an exhaustive list of possible options):
• Other capacities can be ordered depending on sparing scheme and sector size requested.
• Single unit shipping pack. The drive is normally shipped in bulk packaging to provide maximum protection
against transit damage. Units shipped individually require additional protection as provided by the single unit
shipping pack. Users planning single unit distribution should specify this option.
• The Cheetah 18LP Installation Guide, part number 83329410, is usually included with each standard OEM
drive shipped, but extra copies may be ordered.
3.9 Accessories (user installed)
The following accessories are available. All accessories may be installed in the field.
• Single unit shipping pack.
Formatted
data block size
512 bytes/sector [1]
Unformatted
ST318203 and ST318233 21EB390h (18.20 GB) [2] 21.6 GB
ST39103 and ST39133 10F59C8h (9.10 GB) [2] 10.8 GB