Help needed!

I installed another hdd but my machine isnt recognizing it???

In disk manager it says offline and has a circle with a small red arrow in it??  When try to initialize it,it says  cannot i/o error…

Iv tried so much,everytin i can tink of,it was wurkin perfect but as soon as i waz givin it and tried it it wudnt wurk!!!

When i first installed it the bios recognied it as its proper name “wd2500 250gb”  but now it recognizes it as “wd rom-hawk…”

and only 8gb???     I am so lost,iv spent so long tryin 2get it wurkin,any help that any1 cud giv would b very much appreciated!!!    Thankin you.

its broke