Thanks, everything now seems to be working fine Shutting down the transmission service first allows me to power down the server without issues.
I have just one question regarding having to stop the transmission service when I want to shut down the server.
I have bought a UPS, http://www.ebuyer.com/238120-apc-back-ups-pro-900-ups-ac-230-v-540-watt-900-va-br900gi
I will be using the apcupsd plugin so when I get a power cut it shuts down the server. I take it there is a config file for APCUPSD that I can add the commands to stop the transmission service first, so the system can shut down successfully?
Also I am very concerned about hard drive I/O performance. I have two 3tb hard drives. I have created a share called torrents which uses both disks. I intented to seed 500 torrents, however I also have Plex Media Server installed and will be streaming videos to 3 clients at once. What I am wondering is if say 30 of my 500 torrents are actively seeding and I am streaming 3 seperate video files to 3 clients at once, will the heads on my hard drives be able to cope with so much random read access? Or will my videos stutter because the heads are having to move much too fast.