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8 Barracuda 180 Product Manual, Rev. A
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 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, you can change the drive’s capacity to something less than maximum. See
the 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 will 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 maxi-
mum number of LBAs is rounded down to the maximum capacity.
3.7 Factory installed accessories
OEM standard drives are shipped with the Barracuda 180 Installation Guide, part number 100109942 and the
Safety and Regulatory Agency Specifications, part number 75789512 (unless otherwise specified). A small
bag of jumper plugs used for the J2, J5, and J6 option select jumper headers are also included with the drive.
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 Barracuda 180 Installation Guide, part number 100109942. This guide is usually included with each
standard OEM drive shipped, but you may order extra copies.
• The Safety and Regulatory Agency Specifications, part number 75789512, is usually included with each
standard OEM drive shipped, but you may order extra copies.
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
ST1181677 1522c441h (181.6 GB) [2] 241.9 GB