advantages to a SSD compared to a traditional spinning mechanical hard drive, such as:
1. There are no noise, as there are no moving parts.
2. Less heat emission compared to hard drives, as again, there are no moving parts.
3. Lower power consumption, because you’ve guessed it, there are no moving parts, which results in longer battery life for laptops and mobile devices.
4. SSD are much more resistant to shocks than hard drives are.
5. Much lower latency (in the 0.07ms compared to 7-9ms).
6. Higher transfer rates for reading (Up to 330 MB/s+) and writing files.
SSD are similar to hard drives in the way that they delete files: They don’t. They simply flag the files as deleted.
What’s the problem with that? With a hard drive, when you want to use the space occupied by the previous file, the hard drive would simply overwrite it. In the case of a SSD, it needs to erase the file prior to writing again.
Until recently, SSD would delete the file right before writing the new one. Needless to say, this slows down write operations a lot, especially as your SSD gets filled up and you need to erase pretty much any previously deleted file to write new data.
TRIM is here to change that through. What TRIM does is erase the file right away, allowing you to write at full speed without waiting to erase previously used space.
Now, to use TRIM, you need a OS that supports it, such as Windows 7, Mac OS X and some variants of Linux being the only ones as far as I know. You also need a SSD that supports TRIM obviously. Note that OCZ, Intel and a few other SSD manufacturers offer an utility that mimics what TRIM does, for OSes that don’t support TRIM.
If you want to learn more about SSDs and TRIM, I highly recommend
http://www.anandtech.com/storage/showdoc...i=3531&p=1
http://www.anandtech.com/show/2829
You can use two or more SSDs in RAID, you just need to pick the right SSDs. My recommendation would be use either one of these, in this order:
1. A SandForce based SSD, such as Corsair Force series or OCZ Vertex 2/Agility 2 series.
2. Toshiba controller based SSDs (Mostly some Kingston models).
3. Any Intel SSD.
Corsair Nova 2.5″ 32GB SATA II SSD 70usd
Mushkin Callisto 2.5″ 40GB SATA II SSD 100usd
OCZ Agility 2 2.5″ 60GB SATA II SSD 120usd