Seagate ST34555N, Руководство по эксплуатации продукта

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Hawk 4XL Product Manual, Rev. A 7
3.1 Standard features
The Hawk 4XL family has the following standard features:
• Integrated SCSI controller
• Single-ended SCSI drivers and receivers
• 8 bit and 16 bit I/O data bus models available
• Asynchronous and synchronous data transfer protocol
• Firmware downloadable via SCSI interface
• Selectable even byte sector sizes from 180 to 4,096 bytes/sector
• Programmable drive capacity
• Programmable sector reallocation scheme
• Flawed sector reallocation at format time
• Programmable auto write and read reallocation
• Reallocation of defects on command (Post format)
• 128-bit Reed-Solomon error correcting code
• Sealed head and disc assembly
• No preventative maintenance or adjustment required
• Dedicated laser textured head landing zone
• Embedded servo data rather than a separate servo data surface
• Self diagnostics performed when power is applied to the drive
• 1:1 Interleave
• Zoned bit recording (ZBR)
• Vertical, horizontal, or top down mounting
• Dynamic spindle brake
• Active IC terminators enabled by jumpers
• 512 K byte data buffer
• SCAM (SCSI Configured AutoMagically) plug-n-play level 2 compliant, factory set to level 1 (not user select-
able)
• Low audible noise for office environment
• Low power consumption
• Audio Visual (A/V) ready
3.2 Media characteristics
The media used on the drive has a diameter of approximately 3.5 inches (86 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
• Supports industry standard Ultra SCSI interface (also called “Fast-20 SCSI”)
• Programmable multi-segmentable cache buffer
• 7200 RPM spindle. Average latency = 4.17 ms
• Command queuing of up to 64 commands
• Background processing of queue
• Supports start and stop commands (spindle stops spinning)
3.4 Reliability
• 800,000 hour MTBF
• LSI circuitry
• Balanced low mass rotary voice coil actuator
• Incorporates Seek To Improve Reliability algorithm (STIR)
• 3-year warranty