Table of Contents
Advertisement
Cheetah 73FC Product Manual, Rev. C
3.4
Reliability
• 1,200,000 hour MTBF
• LSI circuitry
• Balanced low mass rotary voice coil actuator
• Self-Monitoring Analysis and Reporting Technology (S.M.A.R.T.)
• Dithering
3.5
Unformatted and formatted capacities
Formatted capacity depends on the spare reallocation sectors scheme selected, the number of dta tracks per
sparing zone, and the number of alternate sectors (LBAs) per sparing zone. The following table shows the
standard OEM model capacity:
ST173404FC
Standard OEM models are formatted to 512 bytes per block. You can order other capacities by requesting a dif-
ferent sparing scheme and logical block size.
The sector size is 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. The
ST173404FC drives use a zone sparing scheme. The drive is divided into frequency zones with a variable
number of spares in each zone.
Note.
For 2 gigabit operation sector sizes must be divisible by 8.
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 (6) parameter list table in the Fibre Channel Interface Manual, part number 77767496. 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 other than zero and less than the maximum number of LBAs in the Number of Blocks field
changes the total drive capacity to the value in the Number of Clocks 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 73FC Installation Guide (part number 83329483) and the
Safety and Regulatory Agency Specifications page (part number 75789512).
3.8
Factory-installed options
You may order the following items which are incorporated at the manufacturing facility during production or
packaged 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 73FC Installation Guide, part number 83329483, is usually included with each standard OEM
drive shipped, but extra copies may be ordered.
• The Safety and Regulatory Agency Specifications, part number 83329483, is usually included with each
standard OEM drive shipped, but extra copies may be ordered.
3.9
User-installed accessories
The following accessories are available. All kits may be installed in the field.
• Evaluation kit, part number 73473641.
This kit provides an adapter card ("T-card") to allow cable connections for two FC ports and DC power. Two
twin axial cables, 6 feet in length, are included for the input and output connections to the FC interface.
• Single-unit shipping pack.
Formatted
087ACE4Dh (73.4) Gbytes
Unformatted
87.4 Gbytes
7
Advertisement
Table of Contents
