In the two 11T EXT4 filesystems (raid level 6), referred to inprevious posts, built on devices /dev/sdb /dev/sdc tune4fs listed the filesystem state as "not clean". I remounted them as read only while I decided what to do. The next day I check them again and "tune4fs" reports the filesystem state as "clean". Could this be normal behaviour? Steve -- Dr Stephen Brooks http://www-solar.mcs.st-and.ac.uk/ Solar MHD Theory Group Tel :: 01334 463735 Fax :: 01334 463748 E-mail :: steveb at mcs.st-andrews.ac.uk --------------------------------------- Mathematical Institute North Haugh University of St. Andrews St Andrews, Fife KY16 9SS SCOTLAND ---------------------------------------