Memilih antara SAS vs SATA Hard Disk untuk Sistem RAID Server Anda
Note:
Implementasi vendor fitur ini bervariasi antara
model drive. (Tipe MTBF, suhu operasi, dan operasi getaran rotasi bervariasi
tergantung pada produsen). Umumnya kualitas atas dari fitur spektrum termasuk
kelas enterprise SAS hard drive, dan kualitas rendah termasuk SATA Desktop-class
drive. SATA Enterprise-class drive berada di antara keduanya.
Requirement
|
SAS
|
SATA
|
|
Operational Availability
|
24 hours/day - 7days/week
|
8 hours/day - 5days/week
|
|
Workload
|
100%
|
10-20%
|
|
Cost Sensitivity
|
Moderately sensitive to cost
|
Sensitive to low cost
|
|
Performance
|
Latency and Seek
|
5.7 msec @ 15K rpm
|
13 msec @ 7200rpm (or smaller)
|
Command Queuing and Reordering
|
Full
|
Limited
|
|
Rotational Vibration Tolerance
|
Up to 21 rads/sec/sec
|
Up to 5 to 12 rads/sec/sec
|
|
Typical I/Os per sec/drive
|
319
|
77
|
|
Duplex Operation
|
Full
|
Half
|
|
Reliability
|
Bad Sector Recovery
|
Typical time out 7-15 sec only
|
Time outs up to 30 sec
|
Misalignment detection
|
Dedicated Servo and data path processors
|
Single combined servo/data path processor or none
|
|
Vibration Sensors
|
RV Compensation Feedback Mechanism
|
No RV Compensation
|
|
Variable Sector Size
|
Utilizes a 528 byte sector and allow the I/O controller
|
Do not utilize a variable sector size (locked at 512 bytes)
|
|
MTBF
|
1.2M hours at 45 degrees C
|
700K hours at 25 degrees C
|
|
Internal Data Integrity Checks
|
End to End
|
Limited, none in memory buffer
|
|
Maximum Operating Temperature
|
~60 degrees C
|
~40 degrees C
|
|
Warranty
|
~5 years
|
~ to 3 years
|
|
Features
|
Spindle Motor
|
Higher RPM
Tighter run-out Spindle anchor at both ends |
Moderate to lower RPM
Lower specification for run-out Spindle anchored at one end |
Media
|
Full media cert
|
Lower media specification and density
|
|
Head Stack Assembly
|
Structural rigidity
Lower inertial design |
Lighter Weight Design
Higher inertial design |
|
Actuator Mechanics
|
Larger magnets
Air turbulence controls RV sensors and closed loop RV suppression |
Smaller magnets
No air turbulence compensation No RV sensors or suppression - limited to servo wedge track alignment |
|
Electronics
|
Dual processors
(dedicated servo and data path processors) Performance optimization Advanced Error Handling Advanced firmware algorithms |
Single processor
No performance optimization Standard Error Handling Standard Firmware algorithms |
|
Customization
|
FW Code
|
Extensive
|
Limited
|
Variable Sector Sizes
|
Yes
|
No
|
|
LEDs
|
Yes
|
No
|
Tentunya sangat disarankan untuk anda menghubungi vendor hard drive pilihan Anda untuk membahas hard drive dan fitur paling cocok untuk melakukan deployment pada application Anda.
source: http://www.intel.com/support/motherboards/server/sb/CS-031831.htm
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