Hello *, Problem: frequent messages like this in syslog ( SLES 9 ) Mar 2 18:29:50 celsius01 kernel: hdi: drive_cmd: status=0x51 { DriveReady SeekComplete Error } Mar 2 18:29:50 celsius01 kernel: hdi: drive_cmd: error=0x04 { DriveStatusError } Mar 2 18:29:51 celsius01 [powersave_proxy][7632]: WARNING: hdparm returned error 5 Mar 2 18:29:51 celsius01 kernel: hdk: drive_cmd: status=0x51 { DriveReady SeekComplete Error } Mar 2 18:29:51 celsius01 kernel: hdk: drive_cmd: error=0x04 { DriveStatusError } Questions: -is there any resolution else than disabling write back cache or enabling write barrier with ext3 ? -can i disable write back cache for SATA Disks by command or only if BIOS provides this funktionality ? -if there is already a ext3 FS on the disk, can i change it without recreate to -o barrier=1 ? Kernel: Linux celsius01 2.6.5-7.252-smp #1 SMP Tue Feb 14 11:11:04 UTC 2006 x86_64 x86_64 x86_64 GNU/Linux thx Micha