Cheetah NS 10K.2 SAS Product Manual, Rev. F 7
4.1 Standard features
Cheetah NS SAS drives have the following standard features:
• Perpendicular recording technology
• 1.5 / 3 / 6 Gb Serial Attached SCSI (SAS) interface
• Integrated dual port SAS controller
• Support for SAS expanders and fanout adapters
• Downloadable firmware using the SAS interface
• 128 - deep task set (queue)
• Supports up to 32 initiators
• Jumperless configuration.
• User-selectable logical block size (512, 520, 524, or 528 bytes per logical block)
• Programmable logical block reallocation scheme
• Flawed logical block reallocation at format time
• Programmable auto write and read reallocation
• Reallocation of defects on command (Post Format)
• ECC maximum burst correction length of 400 bits
• No preventive maintenance or adjustments required
• Dedicated head landing zone
• Embedded servo design
• Automatic shipping lock
• Self diagnostics performed when power is applied to the drive
• Zone bit recording (ZBR)
• Vertical, horizontal, or top down mounting
• Dynamic spindle brake
• 16 MB data buffer (see Section 5.5).
• Drive Self Test (DST)
• Background Media Scan (BGMS)
• Power Save
4.2 Media description
The media used on the drive has an aluminum substrate coated with a thin film magnetic material, overcoated
with a proprietary protective layer for improved durability and environmental protection.
4.3 Performance
• Firmware-controlled multisegmented cache designed to dynamically adjust segments for enhanced system
performance.
• 600 MB/sec maximum instantaneous data transfers.
• 10K RPM spindle. Average latency = 2.98 ms
• Command queuing of up to 128 commands
• Background processing of queue
• Supports start and stop commands (spindle stops spinning)
• Adaptive seek velocity; improved seek performance
4.4 Reliability
• Annualized Failure Rate (AFR) of 0.55%
• Mean Time Between Failures (MTBF) of 1,600,000 hours
• Self-Monitoring Analysis and Reporting Technology (S.M.A.R.T.)
• 5-year warranty