8 Savvio 15K.2 SAS Product Manual, Rev. E
4.3 Performance
• Firmware-controlled multisegmented cache designed to dynamically adjust segments for enhanced system
performance
• 600 Mbytes/sec maximum instantaneous data transfers
• 15k RPM spindle. Average latency = 2.0 msec
• Background processing of queue
• Supports start and stop commands (spindle stops spinning)
• Adaptive seek velocity; improved seek performance
Note. There is no significant performance difference between Self-Encrypting Drive and standard (non-
Self-Encrypting Drive) models.
4.4 Reliability
• Annualized Failure Rate (AFR) of 0.55%
• Mean Time Between Failures (MTBF) of 1,600,000 hours
• Balanced low mass rotary voice coil actuator
• Incorporates industry-standard Self-Monit oring Analysis and Reporting Technology (S.M.A.R.T.)
• 5-year warranty
4.5 Formatted capacities
Standard OEM models are formatted to 512 bytes per block. The block size is selectable at format time and
must be a multiple of 4 bytes. Users having the necessary equipment may modify the data block size before
issuing a format command and obtain different formatted capacities than those listed.
To provide a stable target capacity environment and at the same time provide users with flexibility if they
choose, Seagate recommends product planning in one of two modes:
Seagate designs capacity points at certain block sizes that Seagate guarantees current and future products will
meet. We recommend customers use this capacity in their project planning, as it ensures a stable operating
point with backward and forward compatibility from generation to generation. The current guaranteed operating
points for this product are:
Capacity (Blocks)
Sector Size
ST9146852SS
ST9146752SS
ST9146652SS
ST973452SS
ST973352SS
ST973252SS
Decimal Hex Decimal Hex
512 286,749,488 11177330 143,37 4,744 88BB998
520 280,790,185 10BC84A9 140,395,093 85E4255
524 275,154,368 106685C0 137,577,184 83342E0
528 272,662,935 10408197 136,33 1,467 82040CB