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I have a little server with couple of hard drives in it and I was wanting to make a script (bash or perl is all i'm good at - probably not suited) that will put the hard drives to sleep when there is no activity.
Hence saving a bit of power and hopefully a bit of hard drive life.
I was wondering how I could check for activity cause checking for activity will probably cause activity right?
Also I was wondering what to use instead of hdparm as almost all the drives are SATA's and not PATA's.
There are 4 seagates (320x3,200x1) running off 2 sata expansion cards, and another PATA seagate 320 but that is the system drive so no use sleeping that.
PatrickNew and jeffschwab are absolutely correct: "hdparm" and friends are what you're looking for. And you don't even need to write any "scripts" - simply download the software and setup the configuration you prefer.