HGST主流硬盘数据对比参考
自行整理，难免疏漏，给需要买大容量硬盘的朋友：红色为性能突出，蓝色为相对较弱
Ultrastar Archive Ha10Ultrastar He8Ultrastar He6Ultrastar7K6000Ultrastar7K4000Deskstar NAS
SATA ModelsSATA ModelsSATA ModelsSATA ModelsSATA ModelsSATA Models
General
InterfaceSATA 6Gb/sSATA 6Gb/sSATA 6Gb/sSATA 6Gb/sSATA 6Gb/sSATA 6Gb/s
Capacity (GB)10,000 (10TB)8TB / 6TB6TB6TB / 5TB / 4TB / 2TB4TB / 3TB / 2TB6TB / 5TB / 4TB / 3TB
Sector size(Variable, Byes/sector)512e: 512 ; 4Kn: 4096512e: 512 ; 4Kn: 4096512n4Kn: 4096 / 512e: 512512e/512n512n
Max ArealDensity (Gbits/sq. in.)830664 (8TB)544512e/4Kn: 703 (6TB),599 (<6TB), 512n*: 623446/475703/586, 446/425
Form Factor3.5-inch HDD3.5-inch HDD3.5-inch HDD3.5-inch HDD3.5-inch HDD3.5-inch HDD
Performance
Data Buffer(MB)2561286412864128(6TB/5TB)/64(4TB/3TB)
RotationalSpeed (RPM)720072007200720072007200
LatencyAverage (ms)4.164.164.164.164.164.16
Interfacetransfer rate (MB/sec, max)600600600600600600
Sustainedtransfer rate (MB/sec, typ.)157 (read), 68(write)*205MB/s (8TB) /195Mib/s (8TB)177MB/s: 227 (6TB), 202(<6TB) / MiB/s: 216 (6TB), 192 (<6TB)171/181246/205, 205/192
Seek Time(read, ms, typical)8.5**8.5 (Read), 9.0(Write)8.57.6 (Read), 8.0(Write)88.5
Reliability
Error Rate(non-recoverable, bits read)1 in 10^151 in 10^151 in 10^151 in 10^151 in 10^151 in 10^14
MTBF (Mhours)22.52.5221
Load/UnloadCycles600,000600,000600,000600,000600,000600,000
Availability(hrs/day x days/wk)24x724x724x724x724x724x7
Reliability -Warranty (yrs)555553
Acoustics
Idle (Bels)2222.92.92.9
Power
Requirement+5 VDC, +12 VDC+5 VDC, +12 VDC+5 VDC, +12 VDC+5 VDC, +12 VDC+5 VDC, +12 VDC+5 VDC, +12 VDC
Operating (W,typical)7.67.479.111.411.4/10
Idle (W)5.15.13.77.15.77.3/6.9
Powerconsump. efficiency index (W/GB)0.000510.00064 (8TB)0.000620.0012 (6TB)0.0014 (4TB)0.0012 (6TB)
Physical Size
Z-Height (mm)26.126.126.126.12626.1
Dimensions(width x depth, mm)101.6 (+/-0.25) x 147101.6 (+/-0.25) x 147101.6 (+/-0.25) x 147101.6 (+/-0.25) x 147101.6 (+/-0.25) x 147101.6 (+/-0.25) x 147
Weight (g,max)650650650715690715
Environmental(operating)
Ambienttemperature10° to 60°C5° to 60°C5° to 60°C5° to 60°C5° to 60°C5° to 60°C
Shock(half-sine wave)707070707070
Vibration (5to 500 Hz)0.67 (XYZ)0.67 (XYZ)0.67 (XYZ)0.67 (XYZ)0.67 (XYZ)0.67 (XYZ)
Environmental(non-operating)
Ambienttemperature-40° to 70°C-40° to 70°C-40° to 70°C-40° to 70°C-40° to 70°C-40° to 70°C
Shock(half-sine wave)300 (1ms), 150 (11ms)300 (1ms), 150 (11ms)300 (1ms), 150 (11ms)300 (1ms), 150 (11ms)300 (1ms), 150 (11ms)300 (1ms), 150 (11ms)
Vibration (5to 500 Hz)1.04 (XYZ)1.04 (XYZ)1.04 (XYZ)1.04 (XYZ)1.04 (XYZ)1.04 (XYZ)
* For every write command, verify read of previous track iscompleted to ensure data reliability to achieve 2M hrs MTBF enterprise-gradereliability and quality while achieving 10TB industry-highest HDD capacity.
** With SMR technology, write is always sequential in an SMR zone. Averageseek time for write is not defined.
为了数据安全这都不贵
东芝DT01ABA300V 3TB监控盘似乎是5940转。之前一直用的希捷Pipeline HD 5900转的
He6不如He8，最高只有6T，但是都是250万小时的，7K6000是普通机械盘200万小时，但是性能更好
机械硬盘的性能参数基本都可以忽略了，因为所有参数都会被SSD秒杀，甚至是纳秒杀。
就性能来说，机械硬盘只看转速就可以了。7200的肯定比5400/5900的好。
稳定性主要看AFR和MTBF即可。
物理参数，同容量硬盘比重量，可能轻的好点。
买HGST的车载系列，虽然只有500GB
在快也是机械，大家现在在意的无非就是哪个硬盘更安全一点。
说机械硬盘你非扯上SSD做什么？苹果A9处理器的性能参数基本都可以忽略了，因为所有参数都会被i3秒杀，甚至是纳秒杀。
结论是啥？。
纯5400的大容量盘已经很少了，大部分是变速的，还不如直接上7200