Today I took home a hard drive of this type that belonged to my boss, having agreed to scan it for errors before bringing it back in my next shift. The drive was inside an Iomega enclosure whose warranty had already expired, and it had only been used a few times, so I'd assumed it had still been working perfectly - which was before I found out what sort of drive it was. When I asked her about its usage, she said that one of those times had been to copy a sizable amount of music to it.
However, when I turned it on and linked it up to my system, it couldn't even recognize it, and the drive started producing repeated clicking sounds after spinning up. It then spun down after eight clicks, never to be detected by my machine - this after only being used a few times and little over a year in her possession. I'm just lucky she was understanding about it and that she'd backed up everything that was on it before I'd taken it out of the premises, and I've agreed to buy another drive on her behalf.
I've been aware of the problems with these drives for a long time and had feared that it was of this type - my fears were proven right. I also know that Seagate has refused to acknowledge that there is a problem with these drives, and that they've tried to blame practically everyone but themselves for these problems. If they've learned anything from what happened to Fujitsu in 2004 and IBM the year before when they sold defective drives (Fujitsu MPG and the IBM Deathstar, anyone?), they'll own up to the faults with them and recall these shoddy drives.