Defrag

[then00b]

You can also do a quick test on the disk:

Use whatever your sdx is, a, b, c

For comparison,
On a good WD Hard Disk

Code:

sudo hdparm -t /dev/sdb

/dev/sdb:
Timing buffered disk reads: 332 MB in  3.00 seconds = 110.57 MB/sec

On Samsung SSD

Code:

sudo hdparm -t /dev/sda

/dev/sda:
Timing buffered disk reads: 1494 MB in  3.00 seconds = 497.68 MB/sec

This is what I got:

Timing buffered disk reads: 244 MB in  3.01 seconds =  81.03 MB/sec