Seagate ST3450757FC ユーザーズマニュアル
8
Cheetah 15K.7 FC Product Manual, Rev. C
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.
with a proprietary protective layer for improved durability and environmental protection.
4.3
Performance
• Programmable multi-segmentable cache buffer
• 400 Mbytes/sec maximum instantaneous data transfers per port
• 15k RPM spindle; average latency = 2.0 msec
• Command queuing of up to
• 400 Mbytes/sec maximum instantaneous data transfers per port
• 15k RPM spindle; average latency = 2.0 msec
• 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
• 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
Self-Encrypting Drive) models
4.4
Reliability
• Annualized Failure Rate (AFR) of 0.55%
• Increased LSI circuitry integration
• Self-Monitoring Analysis and Reporting Technology (S.M.A.R.T.)
• Dithering
• 5-year warranty
• Increased LSI circuitry integration
• Self-Monitoring Analysis and Reporting Technology (S.M.A.R.T.)
• Dithering
• 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 one of the supported sizes listed in the table below.
must be one of the supported sizes listed in the table below.
Seagate designs specify 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:
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:
Seagate drives also may be used at the maximum available capacity at a given block size, but the excess
capacity above the guaranteed level will vary between other drive families and from generation to generation,
depending on how each block size actually formats out for zone frequencies and splits over servo bursts. This
added capacity potential may range from 0.1 to 1.3 percent above the guaranteed capacities listed above.
Using the drives in this manner gives the absolute maximum capacity potential, but the user must determine if
the extra capacity potential is useful, or whether their assurance of backward and forward compatibility takes
precedence.
capacity above the guaranteed level will vary between other drive families and from generation to generation,
depending on how each block size actually formats out for zone frequencies and splits over servo bursts. This
added capacity potential may range from 0.1 to 1.3 percent above the guaranteed capacities listed above.
Using the drives in this manner gives the absolute maximum capacity potential, but the user must determine if
the extra capacity potential is useful, or whether their assurance of backward and forward compatibility takes
precedence.
Sector Size
ST3600057FC
ST3600957FC
ST3600857FC
ST3450857FC
ST3450757FC
ST3450657FC
ST3300657FC
ST3300557FC
ST3300457FC
Decimal
Hex
Decimal
Hex
Decimal
Hex
512
1,172,123,568
45DD2FB0
879,097,968
3465F870
585,937,500
22ECB25C
520
1,147,307,694
446286AE
860,480,771
3349E503
573,653,848
22314358
524
1,132,015,600
43792FF0
849,011,700
329AE3F4
566,007,800
21BC97F8
528
1,115,749,560
4280FCB8
836,812,167
31E0BD87
557,874,778
21407E5A