> The above "hdparm -W 0" might solve the problem totally. Is this write cache > turn off permanent? If not, in which boot script can I add the command? I > suppose this change will reduce harddisk performance a little bit, right? > Regards, > Peter > hdparm needs to be called with each reboot. Some distributions include an /etc/init.d/hdparm script (and /etc/hdparm.conf). If these exist, use them to turn off the write cache. If they don't exist, place the hdparm command in an init script before most partitions are mounted (i.e., in a new script before the mountall executes, or at the top of the mountall script). (As an example, my Debian system has mountall placed as @S35 in the script order, and I placed a script I made, mountloop, as @S34 in the script order; mountloop calls hdparm, and then does special prep work for encrypted swap or /tmp.) - Linux-crypto: cryptography in and on the Linux system Archive: http://mail.nl.linux.org/linux-crypto/