Product manual

6 Cheetah 4LP FC Product Manual, Rev. A
3.1 Standard features
Cheetah 4LP FC drives have the following standard features:
• Integrated dual port FC-AL controller
• Support for FC-AL (Fibre Channel Arbitrated Loop)
• Differential copper FC drivers and receivers
• Downloadable firmware using the FC-AL interface
• Drive selection ID and configuration options are set on the FC-AL backpanel or through interface com-
mands. Jumpers are not required on the drive.
• Fibre Channel worldwide name uniquely identifies the drive and each port
• User-selectable logical block size (180 to 4,096 bytes)
• Selectable frame sizes from 128 to 512 bytes
• Reallocation of defects on command (post format)
• Industry standard 3.5-inch low profile (1 inch high) form factor dimensions
• Programmable logical block reallocation scheme
• Flawed sector reallocation at format time
• Programmable autowrite and read reallocation
• Reed-Solomon error correction code for header and data fields
• Sealed head and disc assembly (HDA)
• No preventive maintenance or adjustments required
• Dedicated head landing zone
• Automatic shipping lock
• Embedded Grey Code track address to eliminate seek errors
• Self-diagnostics performed at power on
• 1:1 interleave
• Zone bit recording (ZBR)
• Vertical, horizontal, or top down mounting
• Dynamic spindle brake
• 1,024 Kbyte data buffer (see Section 4.5)
• Embedded servo design
3.2 Media description
The media used on the drive has a diameter of approximately 95 mm (approximately 3.7 inches). The alumi-
num substrate is coated with a thin film magnetic material, overcoated with a proprietary protective layer for
improved durability and environmental protection.
3.3 Performance
• Programmable multi-segmentable cache buffer
• 106.3 Mbytes/sec maximum instantaneous data transfers
• 10,033 RPM spindle; average latency = 2.99 msec
• Command queuing of up to 64 commands
• Background processing of queue
• Supports start and stop commands
• Adaptive seek velocity; improved seek performance
3.4 Reliability
• 1,000,000 hour MTBF (Class A computer room environment)
• Fibre Channel (FC) interface transports SCSI protocol through CRC protected frames
• LSI circuitry
• Balanced low mass rotary voice coil actuator
• Self-Monitoring Analysis and Reporting Technology (S.M.A.R.T.)