Standard Features; Media Characteristics; Performance; Reliability - Seagate ST39173N Product Manual

Barracuda 9LP Product Manual, Rev. C
3.1

Standard features

The Barracuda 9LP family has the following standard features:
• Integrated SCSI controller
• Single-ended or high voltage differential SCSI drivers and receivers, or low voltage differential drivers and
receivers ("LC" and "LW" models only)
• 8 bit or 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 512 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)
• Enhanced ECC correction capability up to 185 bits
• 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 ("N" and "W" models only)
• 512 Kbyte data buffer or 2 Mbyte optional; "LW" and "LC" model drives have 1 Mbyte, or optional 4 Mbyte
data buffer
• Hot plug compatibility (section 9.6.4.3 lists proper host connector needed) for "WC" and "LC" model drives
• 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
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 Fast-20 and Fast-40 ("LC" and "LW" drives only) SCSI interfaces (also called
"Ultra-1 SCSI" and "Ultra-2 SCSI," respectively)
• Programmable multi-segmentable cache buffer (see Section 4.4)
• 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

• 1,000,000 hour MTBF
• LSI circuitry
• Balanced low mass rotary voice coil actuator
• Incorporates industry-standard Self-Monitoring, Analysis and Reporting Technology (S.M.A.R.T.)
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