Therefore, seek time continues to be the largest source of latency in HDDs.
因此，寻道时间一直是HDD的延迟时间的最主要来源。
But although SSD costs are declining every quarter, SSDs are still more expensive than HDDs.
但是，虽然SSD的成本每个季度都在递减，但是SSD仍然比HDD昂贵。
Silent operation - SSDs are completely silent when they are running, HDDs are most definitely not
工作静音——SSD运行时完全静音，硬盘驱动器则绝对不可能。
One of the databases had its data stored on EFDs; the other had its data stored on similarly configured FC HDDs.
其中一个数据库将数据存储在EFD中；另一个将数据存储在有相似配置的FCHDD上。
And while the capacity of HDDs has grown exponentially, the speed of these devices has not significantly increased.
而当HDD的容量指数级增加时，这些驱动器的速度并没有实现显著增长。
But other portable music players with HDDs (Hard Disk Drives) or silicon devices have become popular.
但采用硬盘或是半导体设备的播放器变的越来越流行。
As a result, a significant amount of space on HDDs (greater than 50% in many cases) is never used or under-utilized.
结果，HDD上有大量的空间(大多数情况下大于50%)是从不使用或很少使用的。
Chrome OS netbooks do not have HDDs but instead they use flash based memory solutions or solid state drives (SSD) for that.
ChromeOS上网本并没有硬盘驱动器(HDD)，而是采用了基于闪存的内存解决方案或是固态硬盘(SSD)。
The type of CPU used, IOPS needed, and throughput desired are the factors that determine exactly how many HDDs are required.
使用的CPU类型、所需要的 IOPS和预期吞吐量是准确确定所需要的 HDD 数量的因数。
One very interesting reliability improvement for ATA HDDs is protection against shock, sudden jolts that can destroy HDDs in laptop computers.
ATAHDD的一个非常有趣的可靠性改进就是震动保护，这种突然的晃动会破坏笔记本电脑的 HDD。
PCMARK 8 Storage measures the performance of SSDs, HDDs and hybrid drives in your system. The results are not influenced by CPU or GPU performance.
PCMARK8存储测试衡量你系统里的固态硬盘，机械硬盘和混合硬盘性能，测试结果不受到CPU或者GPU性能的影响。
Now, the most commonly used enterprise hard disk drives (HDDs) are limited by the rate of head movement, the speed of the spinning platter, and seek latency.
现在，大多数常用的企业硬盘驱动器(HDD)都受到磁头移动速度、盘片旋转速度和查找延时的限制。
To confirm placement options for DB2 objects on SSDs, we chose an IBM DB2 OLTP workload to drive a series of tests, starting with a baseline of all database files on HDDs.
为了证实DB2对象在SSD 上的性能效果，我们选择一个IBM DB2OLTP工作负载来进行一系列的测试，首先以所有数据库文件放在 HDD 上的场景作为基准。
To confirm placement options for DB2 objects on SSDs, we chose an IBM DB2 OLTP workload to drive a series of tests, starting with a baseline of all database files on HDDs.
为了证实DB2对象在SSD 上的性能效果，我们选择一个IBM DB2OLTP工作负载来进行一系列的测试，首先以所有数据库文件放在 HDD 上的场景作为基准。
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