What exactly are you trying to accomplish with adding a SSD to your system? If you're planning on keeping both drives, I would recommend moving your non-SSD drive to the optical bay and installing your new SSD into the regular HD slot only because there have been numerous reports of issues with running a SSD in the optical bay on various systems.
In your particular case, and with your particular configuration, I would recommend using the SSD for the OS and Applications, and use the HD just for your data. Space permitting, you could use Carbon Copy Cloner to move everything from your HD to your SSD. If this isn't possible due to space constraints, your best bet would be to do a fresh install of ML to your SSD. There are definitely other places that you can obtain InstallESD.dmg -- just make sure that you verify the MD5 of whatever you source.
The screenshots are from Blackmagic Disk Speed Test, which is available in the App Store.
HI! First of all thanks for your reply. Sorry for the lack of explanation. My plan is to use the SSD for OS and applications and as scratch disk for Photoshop CS6. I guess I could put the HDD in the optical bay as you said if that is a more stabile sollution. How would I go about for the first boot. Should I set my opticla as boot drive before I turn the mac off and open the lid (since the drive in the HDD bay would be empty on the first boot.
My SSD is obviously too small to clone my complete HDD to it. Is it possible to clone only the applications and OS with Carbon Copy Cloner?
I was planning a clean install but now it seems the ML install dmg dissapeared after installation. I am aware of other methods to acquire the DMG but it seems a bit unnessecary given the low price. I was just wondering if you can download it again for free as with applications on the Iphone appStore.
If I buy it again will I be able to choose what disk to install it in or will it just automaticly start innstalling on the boot disk?
Finally: can anyone confirm that I dont need any casing to install th 830 in my HDD bay, as the 830 is 7mm and normal HDDs are 9mm