Feeds

Buy Smarter: what you need to know about... SSDs

Speed up your laptop

3 Big data security analytics techniques

Smarter Memory The solid state drive (SSD) is like a fast hard disk drive (HDD) with no moving parts. Many SSDs can be used as direct replacements for mechanical hard drives, although usually with a capacity restriction.

They are better suited to notebooks, netbooks and Ultrabooks because capacities in these tend to be lower than in desktop PCs, where storage can easily run into terabytes. Even in desktops, though, there is good reason to fit an SSD alongside mechanical storage.

The lower cost of SSDs is the reason they are fitted as standard in some portable devices, such as the Apple MacBook Air and in many rivals on the PC side, but not, usually, in new PCs.

They can be retro-fitted, though, so this guide looks at buying for both replacement and supplementation.

Samsung SSD830 240GB SSD

SSDs are faster, less noisy and more robust than hard drives

An SSD is an array of Flash storage chips combined with a sophisticated controller, so it acts like a hard drive. It can perform random and sequential reads and writes like an HDD, but at much higher speed because the data transfer is not governed by the speed at which each bit can be moved through a read/write head to or from the surface of a spinning disk platter.

Instead, the data is stored in much the same way as on a USB drive or memory card, but with a more intelligent controller distributing and buffering it.

Watch Video

Good things about SSDs

SSDs have several advantages over HDDs, particularly when it comes to access time, transfer rate, robustness, power consumption and noise level.

The access time, which is the time before data starts to flow, is typically about 0.1ms for an SSD compared with 5ms-10ms for a hard drive.

The transfer rate of an SSD is between 100MBps and 500MBps, depending on the model, while a typical hard drive comes in at the lower end of this range. If you combine the access time and transfer rate, you will see a noticeable storage speed improvement when using an SSD.

SSDs were originally developed for military use, which demanded toughness

Since there are no moving parts in an SSD, it is considerably more robust than an HDD with its spinning disks and floating heads. SSDs were originally developed for military use, which demanded this kind of toughness.

The lack of moving parts also means that an SSD is completely silent. Modern hard drives are also pretty quiet, but you can still hear them in operation.

Portable devices also benefit from an SSD's lower power consumption, which is about half that of a comparable hard drive.

SANS - Survey on application security programs

Next page: Things to watch

More from The Register

next story
Samsung Galaxy S5 fingerprint scanner hacked in just 4 DAYS
Sammy's newbie cooked slower than iPhone, also costs more to build
Leaked pics show EMBIGGENED iPhone 6 screen
Fat-fingered fanbois rejoice over Chinternet snaps
Oh no, Joe: WinPhone users already griping over 8.1 mega-update
Hang on. Which bit of Developer Preview don't you understand?
Microsoft lobs pre-release Windows Phone 8.1 at devs who dare
App makers can load it before anyone else, but if they do they're stuck with it
Report: Apple seeking to raise iPhone 6 price by a HUNDRED BUCKS
'Well, that 5c experiment didn't go so well – let's try the other direction'
Rounded corners? Pah! Amazon's '3D phone has eye-tracking tech'
Now THAT'S what we call a proper new feature
Feast your PUNY eyes on highest resolution phone display EVER
Too much pixel dust for your strained eyeballs to handle
Hearthstone: Heroes of Warcraft – A jolly little war for lunchtime
Free-to-play WoW turn-based game when you have 20 minutes to kill
Zucker punched: Google gobbles Facebook-wooed Titan Aerospace
Up, up and away in my beautiful balloon flying broadband-bot
prev story

Whitepapers

Top three mobile application threats
Learn about three of the top mobile application security threats facing businesses today and recommendations on how to mitigate the risk.
Combat fraud and increase customer satisfaction
Based on their experience using HP ArcSight Enterprise Security Manager for IT security operations, Finansbank moved to HP ArcSight ESM for fraud management.
The benefits of software based PBX
Why you should break free from your proprietary PBX and how to leverage your existing server hardware.
Five 3D headsets to be won!
We were so impressed by the Durovis Dive headset we’ve asked the company to give some away to Reg readers.
SANS - Survey on application security programs
In this whitepaper learn about the state of application security programs and practices of 488 surveyed respondents, and discover how mature and effective these programs are.