Have you also created your partitions with a reasonably new fdisk (or equivalent) with -c -u as options? Your partitions should be starting somewhere at 2048 i guess (let the sw figure that out). The fast degradation of the one disk might indicate bad partitioning? (maybe recheck with a grml.iso or something alike http://www.grml.org/ ) Also, ... did you know that any unused space in the disk is being used as bad block 'replacement'? so just leave out 1-2 GB space at the end of your disk to make use of this 'feature' otherwise, mdadm supports raid1 with more than 2 drives. I havent seen this configuration much but it makes absolute sense on drives where you expect failure. (i am not speaking spare, but really raid1 with > 2 drives). I like this setup, with ssd drives it might be the solution to decay. regs, klaus -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
