hello. at once i apologize for my english. i didn't find any help at forums on my language, so i came here. well, i'm not sure how to describe my problem, but it's connected with corestorage and fusion drive. it all started when i deleted windows from my mac. i had missed 1tb with it and wanted to return them back. after deleting windows i've formed fusion drive. i tried all and came to the terminal's command "diskutil cs delete [disk name]". i deleted macintosh hd. i didn't really know what happened to my mac after this. now my mac has two disks with: 1tb (if i open partition it has 2tb. i can use only 1tb, and other 1tb is free memory, i can't combine them) and the other one got 120gb, they both called "untitled". when i click on "install OS" its offer to choose between 2 disks. i don't really know should i add screenshots, because it's all in russian, i can't switch language, after this manipulation my mac is grey screened. also, after command "diskutil cs list" in terminal it says "no corestorage logical volume groups found". also, i have no time machine back ups. i want to return all to the factory settings i hope that i've properly described my problem, i really need help if there's not enough information i'll try to give more!