Given the fact that most probably my previous issue is due to a hardware failure: Linux Arch on ARM - Random USB drive "freeze"
It seems that the malfunctioning started when I had a lot of torrent seeding with Transmission (which has no queue support); I usually (for ethical reasons) keep seeding until seed ratio is 1.1 and have an internet connection with download/upload ratio of about 20, so usually time of seed is several times the time of download. This leads to the drive being active almost 24/7.
Is this really dangerous for my hard drive? Or did I just have bad luck?
It is ok to me to replace the bittorent hard disk every 2-3 years, where the one I dismiss goes to samba sharing or completely dismissed.
Edit: a few details to help understand the scenario.
The computer is actualy a plug computer with only 128MB of RAM (not expandable); the files usually are 300-700 MB large so no cache can help here.
During normal work it seeks sometimes, say every few seconds at most, not continually; my use is not worth a server class HD.
SMART says the faulty drive is perfectly fine!
Reported Google study shows the fact that my hd is probably somewhere in the area of the ones which fail in the first year of life... bad luck!
I actually use Deluge now because it has queue support.
The drive is not dead, it seems that it "takes a pause" unpredictably, seems more often as the average load (mostly repeated seeks) raises.