3.0General description
Cheetah drives combine perpendicular recording, giant magnetoresistive (GMR) heads, partial response/max- imum likelihood (PRML) read channel electronics, embedded servo technology, and a Serial Attached SCSI (SAS) interface to provide high performance, high capacity data storage for a variety of systems including engi- neering workstations, network servers, mainframes, and supercomputers. The Serial Attached SCSI interface is designed to meet
Cheetah drives are random access storage devices designed to support the Serial Attached SCSI Protocol as described in the ANSI specifications, this document, and the SAS Interface Manual (part number 100293071) which describes the general interface characteristics of this drive. Cheetah drives are classified as intelligent peripherals and provide level 2 conformance (highest level) with the ANSI
The head and disk assembly (HDA) is sealed at the factory. Air recirculates within the HDA through a non- replaceable filter to maintain a
Note. Never disassemble the HDA and do not attempt to service items in the sealed enclosure (heads, media, actuator, etc.) as this requires special facilities. The drive does not contain
Cheetah drives use a dedicated landing zone at the innermost radius of the media to eliminate the possibility 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 disks 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.
Cheetah drives decode track 0 location data from the servo data embedded on each surface to eliminate mechanical transducer adjustments and related reliability concerns.
The drives also use a
Cheetah 15K.6 SAS Product Manual, Rev. A | 7 |
