I am on my second one in less than a year, SEAGATE ST31000524AS. P/N 9YP154-304. Firmware JC4B. Date code 12125. Thailand.
They sent me a free replacement, thought I was good to go. First one was in a system as second drive and noticed not showing up once, worked for a while then started clicking, no more drive. The replacement I put in my live sound and recording system as record drive, been working fine for about 8 months now, CLANK, same deal, started clicking las time I started it up, in drive tray so brought it to the bench machine and was able to back it up. Which I usually do after every gig anyway.
Their sending me another one, but I think I'll just buy another type drive and leave the Seagate as an over flow or spare, no mission critical use.