On Sat, 01 Dec 2007, Martin Marques wrote: >> Also check whether a disks have write-caching turned off - it should. >> On Linux the command is: >> # hdparm -W /dev/sda >> /dev/sda: >> write-caching = 0 (off) > > Uh? That command as was written lacks an argument for -W (0/1). From the > hdparm --help: > > -W set drive write-caching flag (0/1) (DANGEROUS) > > # hdparm -V > hdparm v6.9 # hdparm -V hdparm v7.7 # hdparm --help 2>&1 | grep write-caching -W get/set drive write-caching flag (0/1) You can also use "hdparm -I" to check this - look for a "Write caching" in "Commands/features" section. If it has a "*" in front then it is enabled and dangerous. Regards Tometzky -- ...although Eating Honey was a very good thing to do, there was a moment just before you began to eat it which was better than when you were... Winnie the Pooh ---------------------------(end of broadcast)--------------------------- TIP 4: Have you searched our list archives? http://archives.postgresql.org/