کدهاي جاوا اسکريپت
دانلود كتاب
دانلود موزيك
دانلود کارتون
گوناگون
تجارت الكترونيك
 
 
تبليغات تصويري
مبل هاي عجيب و زيبا را به نرخ توليدي تهيه کنيد
بازي آنلاين و فکري لرد ها
 

 
 
 
 
 

 

 3.5'' Vs. 2.5'' SAS HDDs: In Storage, Size Matters


9:40 PM - May 7, 2010 by Patrick Schmid and Achim Roos
Table of contents

* 1 – Shootout: 3.5” Vs. 2.5” Enterprise HDDs
* 2 – 3.5” Test HDDs: Hitachi Ultrastar 15K450, 15K600
* 3 – 2.5” Test HDDs: Hitachi Ultrastar C15K147
* 4 – Test Setup And Transfer Diagrams
* 5 – Benchmark Results: Throughput And Interface

* 6 – Benchmark Results: I/O Performance And Access Time
* 7 – Benchmark Results: PCMark Application Performance
* 8 – Benchmark Results: Temperature, Power, And Efficiency
* 9 – Conclusion

Diminutive 2.5” form factors are favored in the enterprise storage world for many reasons, but how do high-end 2.5” SAS drives compare to the established 3.5” products when it comes to performance and power? We requested some drives and did the analysis.

With all of the hype surrounding SSDs (solid state drives) these days, you might think that hard drive technology is already dead. Indeed, flash-based storage will certainly replace high-end hard drives in the months and years to come. One of the first victims will be the 3.5” form factor in enterprise applications. Specifically, 10,000 and 15,000 RPM SAS drives will be replaced by 2.5” drives. We compared both form factors at 15,000 RPM.

While 3.5” desktop and 2.5” notebook drives are very different in most things, save recording density, there are significant similarities between 3.5” and 2.5” enterprise hard drives. These share spindle speeds and capacity points for a reason. Internally, 2.5” and 3.5” enterprise drives are based on the same platter diameter. The actual platters still differ, though, since a higher spindle speed requires more solid platters.

The main difference between the two form factors can be found in their total capacities. The 3.5” form factor allows more platters to be crammed into a roughly 26 mm z-height. Four platters can create 600GB, 15,000 RPM, 3.5” SAS hard drives, while a comparable 2.5” model runs on only two platters. A 2.5” enterprise drive running at only 10,000 RPM is usually based on three platters.

A smaller drive requires less power to operate because there's less mass needing to be moved. But how do 2.5” high performance drives compare to their 3.5” brothers? We grabbed several Hitachi enterprise drives and ran some tests.
 

 

منبع : پارس نايس
www.parsnice.top
 

 

 

 

 

 

     
Copyright (C) 2007-2018 parsnice.top All rights reserved
کليه حقوق سايت پارس نايس متعلق به شرکت { پارس نايس انيميشن } مي باشد . طبق قوانين کپي رايت هرگونه نسخه برداري و کپي از مطالب و مقالات سايت ممنوع مي باشد
دانلودفار  | عکس و تصاوير | بازي آنلاين فضايي | خريد مبلمان منزل  | پارس نايس | کالا - شاپ