Barracuda 18LP Family: ST39175LW/LC ST318275LW ... - Seagate

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6 Barracuda 18LP Product Manual, Rev. E Figure 2. Barracuda 18LP family drive
Barracuda 18LP Product Manual, Rev. E 7 3.1 Standard features The Barracuda 18LP family has the following standard features: • Integrated SCSI controller • SCSI multimode single-ended or low voltage differential drivers and receivers • 8 bit or 16 bit I/O data bus models available • Asynchronous and synchronous data transfer protocol • Firmware downloadable via SCSI interface • Selectable sector sizes from 512 to 2,048 bytes/sector in multiples of 2 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 • 1 MByte data buffer or 4 Mbyte optional • Hot plug compatibility • SCAM (SCSI Configured AutoMagically) plug-n-play level 2 compliant, factory set to level 1 (not user selectable) • 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 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 msec • 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 (mature) • LSI circuitry • Balanced low mass rotary voice coil actuator • Incorporates industry-standard Self-Monitoring, Analysis and Reporting Technology (S.M.A.R.T.) • Incorporates Seek To Improve Reliability algorithm (STIR) • 5-year warranty
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Barracuda 18LP Family: ST39175LW/LC ST318275LW ... - Seagate

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