By AOMEI / Last Updated October 19, 2016


When choosing storage component, most people have the confusion of the difference between SSD and HDD. Which one is the right choice? In fact, there is no clear answer. Each buyer has his own evaluation and preference. And of course, your budget occupies a decisive position. Generally, SSD has a relatively higher price over HDD. But if performance is your primary consideration and money is secondary, then SSD is the right one for you.

What is an SSD? To begin with, SSD stands for Solid State Drive. An SSD utilizes a special kind of memory chip with erasable, writeable cells that can keep data even when powered off. SSD usually have faster performance and are on their way to becoming the mainstream. It might help to think of an SSD as an oversized and more sophisticated version of memory stick – you're probably familiar with it.

What is an HDD? HDD stands for Hard Disk Drive. It has been used for donkey's years. An HDD uses magnetism to store data on a rotating platter. A read/write head floats above the spinning platter to read and write data. The faster the platter spins, the faster an HDD can perform. The distinct advantage of an HDD is that it enables to store lots of data cheaply. So if you want lots of cheap storage, standard hard drives are definitely the more appealing way to go.

SSD RAID arrays improve system performance

Today notebook users are getting more and more familiar with SSDs. They are inclined to replace their traditional HDDs because of the noticeable improvement in performance they can gain from SSDs, especially when it comes to speed and durability.

SSDs can offer tremendous gains in performance in desktops, workstations and servers when they are grouped together into RAID arrays and presented to the host operating system as a single drive. RAID storage can increase the I/O performance, as well as make disk drives redundant so that when one fails, the system won't be affected and will still be up and running without data loss. SSDs offer a new level of RAID performance never seen before with traditional hard drives.

Today's mainstream desktops and workstations are built-in with RAID controllers on the motherboard. These RAID arrays are all configured in a separate RAID BIOS accessible on system bootup. Just by using two SSDs in a RAID 0 stripe you can double the drive performance at a minimal cost. Or you can use two SSDs to mirror your system drive in case that when one drive fails the secondary drive will take over without data loss.

In the past years, RAID controller designers have devoted to developing new RAID controller technology to address the increased performance capabilities that SSDs can offer. Additionally some suppliers are offering software with their RAID controllers to use in hybrid storage solutions in which both traditional hard drives and SSDs are used together. This software identifies the frequently read data and copies it directly into an SSD cache for superior read performance.

Benefits of SSD RAID in NAS

NAS stands for network attached storage. NAS RAID is used in the network attached storage devices. The benefits of NAS RAID include: prevent data loss due to hard drive failure; provide faster access to larger volumes; and allow dynamic data volume expansion without backup & restore, etc. From what has been talked above, you must have known that SSD RAID has a better performance than that of traditional hard drives. So SSD NAS can play a maximum role in your data storage. You can have a try of expanding NAS system by using SSD RAID.