Technical Specification

The Barracuda 4LP Family has the following standard features:

• Integrated SCSIcontroller
• Single-ended ordifferential SCSI drivers and receivers
• 8 bit and 16 bit I/O databus models available
• Asynchronous andsynchronous data transfer protocol
• Firmware downloadable viaSCSI interface
• Selectable even bytesector sizes from 180 to 4,096 bytes/sector
• Programmable drivecapacity
• Programmable sectorreallocation scheme
• Flawed sectorreallocation at format time
• Programmable auto writeand read reallocation
• Reallocation of defectson command (Post format)
• 128 bit Reed-Solomonerror correcting code
• Sealed head and discassembly
• No preventativemaintenance or adjustment required
• Dedicated laser texturedhead landing zone
• Embedded servo datarather than a separate servo data surface
• Self diagnosticsperformed when power is applied to the drive
• 1:1 Interleave
• Zoned bit recording (ZBR)
• Vertical, horizontal, ortop down mounting
• Dynamic spindle brake
• Active IC terminatorsenabled by jumpers (“N” and “W” models only)
• 512 K byte data buffer
• Hot plug compatibility(section 9.6.4.3 lists proper host connector needed) for “WC” and “DC” model drives
• SCAM (SCSI ConfiguredAutoMagically) plug-n-play level 1 compliant as shipped. Level 2 is afactoryinstalled option.
• Low audible noise foroffice environment
• Low power consumption

Performance

• Supports industrystandard Ultra SCSI interface (also called “Fast-20 SCSI”) [1]
• Programmablemulti-segmentable cache buffer
• 7200 RPM spindle. Averagelatency = 4.17 ms
• Command queuing of up to64 commands
• Background processing ofqueue
• Supports start and stopcommands (spindle stops spinning)

Reliability

• 1,000,000 hour MTBF
• LSI circuitry
• Balanced low mass rotaryvoice coil actuator
• Incorporatesindustry-standard Self-Monitoring, Analysis and Reporting Technology(S.M.A.R.T.)
• Incorporates Seek ToImprove Reliability algorithm (STIR)