I'm planning to purchase a Crucial M4 256G SSD.
There are 2 versions though, 7mm and 9.5mm, at the same price on Newegg.com
My current laptop is 9.5mm SATA II. However, I plan to purchase a new laptop as soon as Ivy Bridge quad-core laptops (the 35W i7-3612QM interests me most) are available, which will certainly have SATA III (and I plan to use a legacy HDD in optical bay). However, I'm not sure if it will come with a 7mm or 9.5mm slot.
My question is, will a 7mm SSD fit in a 9.5 mm slot? Is there any disadvantage?
(BTW, comments are welcome if you feel Crucial M4 is not a good choice. I chose this after I read rumors about SandForce. I also do not see any reason to switch to Intel 320 Series as Crucial seems to have good reliability as well.)