dear list, i'm running Debian kernel version 2.4.20 with ext3 an an Asus L3 laptop with a Hammerfall HDSP, and my xruns using Jack are frequent and nasty! i would say in the nieghborhood of every 10-20 seconds, i get an xrun of 10-200 ms. i have done all the hdparm stuff, all the necessary low latency and preemptive patches, and have everything set up to run realtime capabilities for Jack. the problem, of course, is that with ext3 and kernel 2.4.20, the machine totally freezes when i do a "jackstart --realtime". [this is documented somewhere, so i know it's not just me!] so, i figure my solution is to convert the filesystem of my main partition to reiserfs, thereby allowing me to gain from its better journal [i.e. less disk activity, i guess] and the ability to use realtime capabilities. and here is where i start to feel like a dumb newbie :-) if my main partition is /dev/hda2, and i am working from another [temporary] root file system in /dev/hda6, how can i back up /dev/hda2 to /dev/hda7 and put it back again after doing the ext3-->reiserfs conversion WITHOUT transferring back over the old file system? i tried dd if=/dev/hda2 of=/dev/hda7, but when i mounted /dev/hda7, it was turned into an ext3 filesystem, although i had already made it reiserfs. i assume that means if i changed dev/hda2 to reiserfs and moved the backup copy there again, it would be ext3 all over again. i tried a few things with cpio that didn't work, and i am not sure i have the syntax right with tar. can someone please help me out here? thx. derek
