On Sat, 2008-07-12 at 07:33 -0700, skimber wrote: > As soon as that happens the following lines are added, twice, to syslog: > > Jul 12 13:23:03 server01 kernel: hdb: dma_intr: status=0x51 { DriveReady > SeekComplete Error } > Jul 12 13:23:03 server01 kernel: hdb: dma_intr: error=0x40 { > UncorrectableError }, LBAsect=345341, sector=345335 > Jul 12 13:23:03 server01 kernel: ide: failed opcode was: unknown > Jul 12 13:23:03 server01 kernel: end_request: I/O error, dev hdb, sector > 345335 Hi Simon, this just looks like a hard disk failure to me. Try writing some data directly to the filesystem that glusterfs is using to store files (i.e not via glusterfs) and see if you come up with the same problem. John.