SSD will not show up after installing
I bought the second HD kit just after purchasing the Mac in 2011 and installed a 1TB second drive. Ended up removing that drive and the stock drive as well and installing an 80GB SDD that worked perfectly until I ran out of space due to the data files for a massive iTunes library stored on a 4TB external drive. I installed a second 80GB SSD as a user drive to solve the space problem and used the drive utility to combine the original 80GB back into one partition. When I installed the OS the new drive would not show up in any utility or the terminal. I finally installed the OS on the new SSD and both drives were available, however the online reinstall would only install lion not mountain lion. When I upgraded to mountain lion I would get a grey screen only able to safe boot. On safe boot all drives are available. I switched back to installing the OS on the original drive but again lost the new SDD.
Sorry for the long winded description as I saw no other problem here that exactly matched this.
Also the 2 SDD and one external HDD is the configuration I plan to use so please no answers suggesting different drives or configurations unless you know my configuration will not work.