General Description; Figure 2. Cheetah 9Lp Fc Disc Drive - Seagate ST39102FC Product Manual

Cheetah 9LP FC Product Manual, Rev. C 5
3.0

General description

TM
Cheetah 9LP FC drives are random access storage devices designed to support the Fibre Channel Arbi-
trated Loop (FC-AL) and SCSI Fibre Channel Protocol as described in the ANSI specifications, this document,
and the Fibre Channel Interface Manual (part number 77767496) which describes the general interface char-
acteristics of this drive. ST39102FC drives are classified as intelligent peripherals and provide level 2 conform-
ance (highest level) with the ANSI SCSI-1 standard.
You can view the Fibre Channel interface as a transport vehicle for the supported command set (ST39102FC
drives use the SCSI command set). In fact, the Fibre Channel interface is unaware of the content or meaning of
the information being transported. It simply packs the SCSI commands in frames, transports them to the
appropriate devices, and provides error checking to ensure that the information reaches its destination accu-
rately. Refer to the documents referenced in Section 2.2 if you require additional information about the Fibre
Channel interface, FC-AL topology, or the SCSI fibre channel protocol.
The head and disc assembly (HDA) is environmentally sealed at the factory. Air recirculates within the HDA
through a non-replaceable filter to maintain a contamination-free HDA environment.
See Figure 2 for an exploded view of the drive. Never disassemble the HDA. This exploded view is for informa-
tion only. Do not attempt to service items in the sealed enclosure (heads, media, actuator, etc.) as this requires
special facilities. The drive contains no parts replaceable by the user and opening the HDA for any reason
voids your warranty.
Figure 2. Cheetah 9LP FC disc drive
drives use a dedicated landing zone at the innermost radius of the media to eliminate the pos-
Cheetah 9LP FC
sibility of destroying or degrading data by landing in the data zone. The heads automatically go to the landing
zone when power is removed from the drive.
An automatic shipping lock prevents potential damage to the heads and discs that results from movement dur-
ing shipping and handling. The shipping lock disengages and the head load process begins when power is
applied to the drive.
The drives also use a high-performance actuator assembly design that provides excellent performance with
minimum power dissipation.