Solid State Drives

Click here for an article on Lifehacker by Adam Dachis entitled The Complete Guide to Solid-State Drives. SSDs are much faster than HDDs (Hard-Disk Drives). One downside is cost:

For the same $100, you could buy either a 120GB SSD or a 2TB HDD. That means you're paying around 83 cents for every gigabyte on an SSD versus five cents for every gigabyte on your HDD.

All SSDs are not created equal. If you're shopping for one, here are some sophisticated considerations.

Multi-Level Cell (MLC) NAND flash memory: When shopping for SSDs, you'll run into two kind of memory: multi-level cell (MLC) and single-level cell (SLC). The primary difference is that MLC memory can store more information on each cell. The advantage here is that it is cheaper to produce, and SLC is often cost-prohibitive for the average consumer. The downside is a higher rate of error, but an SSD with error-correcting code (we'll discuss this momentarily) can help prevent these problems.

SATA III Support: Most SSDs use the Serial ATA (SATA) interface, but not all use the latest version and this can limit the performance of your SSD. This is because SATA I can transfer data at 1.5 Gbps, SATA II at 3.0 Gbps, and SATA III at 6 Gbps. To ensure your SSD has enough bandwidth to transfer data as quickly as possible, you want it to be compatible with SATA III. You'll also want to make sure your computer is SATA III compatible as well. If not, SATA III-capable drives will still work as all versions of SATA are backwards-compatible. Just know that you may not get the most out of your SSD if your computer doesn't support the most recent SATA specification.

ECC memory: Error-correcting code (ECC) memory does what the name implies: it provides your SSD with the ability to detect and correct common types of data corruption so you don't end up with unusable data on your drive. An SSD with ECC memory is more reliable.

It's a new technology, so it might be best to go with SSD manufacturers who are established and have a proven track record; two recommended in this article are OCZ and Crucial.

Don't defrag your SSD:

Because the location of data on an SSD is pretty much irrelevant, as it can quickly access any of it regardless of where it is, defragging a SSD is not only unnecessary but bad for the drive as well. SSDs have a limited lifespan that's determined by how much they're used. While most will last as long as you'd ever need, defragmenting the disk involves reading and writing data unnecessarily and those actions will shorten your SSD's lifespan.