Hawk 2XL Product Manual, Rev. B 7
3.1 Standard features
The Hawk 2XL Family has the following standard features:
• Integrated SCSI Controller with reduced complexity SCSI code
• Single-ended SCSI drivers and receivers
• Asynchronous and Synchronous data transfer protocol
• Firmware downloadable via SCSI interface
• Flawed sector reallocation at format time
• Programmable auto write and read reallocation
• Reallocation of defects on command (Post Format)
• 96 bit Reed-Solomon error correcting code
• Sealed Head/Disc Assembly
• No preventative maintenance or adjustment required
• Dedicated head landing zone
• Embedded servo data rather than a separate servo data surface
• Self diagnostics performed at power on
• 1:1 Interleave
• Zoned Bit Recording (ZBR)
• Vertical, horizontal, or top down mounting
• Dynamic spindle brake
• Permanently mounted terminators on “N” and “W” models, enabled by installation of a jumper plug.
• 256 K byte data buffer (512K byte data buffer for “W” and “WC” models and all Ultra SCSI models)
• Hot Plug compatibility (Section 9.6.4.3 lists proper host connector needed)
• SCAM plug-n-play compliant [1]
• ULTRA SCSI (Models ST32155 and ST31055)
3.2 Media characteristics
The media used on the drive has a diameter of approximately 3.5 inches (89 mm). The aluminum 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
• 5411 RPM Spindle. Average latency = 5.54 msec
• Command Queuing of up to 64 commands
• Background processing of queue
• Supports start and stop commands (spindle stops spinning)
• Low audible noise for office environment
• Low power consumption
3.4 Reliability
• 800,000 hour MTBF
• Adaptive servo calibration for improved seek performance
• LSI circuitry
• Balanced low mass rotary voice coil actuator
• 5 year warranty for ST32151 and ST32155; 3 year warranty for ST31051 and ST31055
[1] Supports SCAM Level 1 at the moment. Will support Level 2 when all presently unresolved requirements
are fully defined. As a factory installed option SCAM can be turned off.
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