Product manual

6 Barracuda 9 Product Manual, Rev. C
Figure 2. Barracuda 9 family drive
3.1 Standard features
Barracuda 9 drives have the following standard features:
• Integrated SCSI controller
• Single-ended or differential SCSI drivers and receivers
• 8-bit and 16-bit I/O data bus models available
• Asynchronous and synchronous data transfer protocols
• Firmware downloadable using a SCSI interface
• Programmable drive capacity
• Selectable sector size from 180 to 4,096 bytes per sector
• Flawed sector reallocation using sector slipping at format time
• Programmable sector reallocation scheme
• Programmable auto write and read reallocation
• Reallocation of defects on command (post format)
• 128-bit Reed-Solomon error-correction code for header and data fields
• Sealed head and disc assembly (HDA)
• 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
• Zone bit recording (ZBR)
• Vertical, horizontal, or top-down mounting
• Dynamic spindle brake
• Active IC terminators enabled by jumper (“N” and “W” models only)
• 512 Kbyte data buffer (2 Mbyte data buffer available as an option). See Section 4.5
• Hot plug compatibility (Section 9.6.4.3 lists proper host connector needed) for “WC” and “DC” model drives
• SCAM (SCSI Configured Auto Magically) Plug-n-Play Level 2 compliant
• Low audible noise for office environment
• Low power consumption