On Sat, Jan 24, 2009 at 09:57:29PM +0100, Markus Ulbricht wrote: > Hi all! > > Since hdd performance of the Thecus N2100 is not so > perfect with debian etch (stable, kernel 2.6.18) I did > an upgrade to lenny with kernel 2.6.26 including the > DMA patches by Martin Michlmayr. > > Thanks to Martin the hard drive performance is now > much better (173 MB/s cached / 48 MB/s buffered reads). > > Unfortunately hdd spindown is no longer working.
Oooh, I've been here. My problem turned out to be atime updating; I had a process that was reading a file every 30 seconds or so, which then caused the atime on that file to be updated and hence the disk was never spinning down. Remounting with noatime did the trick. Assuming that isn't it, it's unlikely that you'll be running enough processes to make finding the culprit by killing things one-by-one impractical. > Since I am not so familiar with kernel (re)compilation I am not able > to create an appropriate kernel needed for tools like atop which is able > to report processes responsible for disk i/o. Rebuilding a kernel isn't hard, but it does take a little while, so I'd go with other investigation methods first. - Matt -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]
