A neighbor has a 2010 21.5 inch iMac and he was having problems with it. I tested it with Scannerz and the original 1TB drive is having problems. I'm considering replacing it for him, but have a few questions. First, he needs big storage. I suggested that he let me pull the optical drive and I could put in an SSD and a hard drive to make a Fusion set up, but he said no because he uses the DVD. Then I suggested a big SSD, but when he saw the prices, he cringed. Finally I came across this hybrid on another site: http://www.wdc.com/en/products/products.aspx?id=1190 WD is calling that a dual drive, a 120GB SSD with a 1TB hard drive. Here are some questions: 1. Is anyone familiar with this thing? It's pushing his price limit as it's nearly $200, but it's within range and it looks like it's almost an internally housed Fusion-like drive, if I'm reading the description properly. 2. The drive is a 2.5" form factor. I assume that I could still use something like that in an iMac because most SSDs use that and people get them to work. 3. Fans! I know at least one type of iMac had some type of issue with fans causing people to put a fan control program in it. Was that limited to one year or is it now everything since? I think the model year with that problem was 2009, but feel free to correct/enlighten me. 4. Other cost effective solutions. If you have some, feel free to suggest. I could consider a regular hybrid or even a regular drive, but I'd like to give the guy the impression of "Wow" when I'm done, but once again, SSDs standalone seem out of the question. Most hybrids seem to have too little flash memory on them for me to be impressed with the performance. Questions? Comments? Feel free, and thanks.