Hi- Rasmus Back: > I have a Dell SC440 running Centos 4.4. It has two 500GB disks in a > RAID1 array using linux software raid (md1 is / and md0 is /boot). > Recently the root file system was remounted read-only for some reason. I had the very same behavior on a RAIDI set on an Areca controller (but no software RAID or VMWare). Scary. I believe if you have the WD drives, it could also be a hardware issue... look: http://www.theinquirer.net/default.aspx?article=37188 http://support.wdc.com/download/index.asp?cxml=n&pid=15&swid=57 Affects 500GB drives. In that particular situation, dmesg said: EXT3-fs error gone raid volume device dm-0 error reading directory Then the / volume remounted itself RO while also reporting 100% usage..