Red Hat RHEL, CentOS, OEL 4 & 5 SAN filesystems go readonly !
Apparently there is a problem in the kernel used in Red Hat RHEL 4&5, CentOS 4&5, OEL 4&5, SUSE, Ubuntu 7 and other GNU/Linux distributions that causes EXT2 EXT3 filesystems that are residing on SANs to randomly go read-only !
However if you are using kernel 2.6.18-53.1.21+ or 2.6.22+ you should be ok !
See Red Hat
- https://rhn.redhat.com/errata/RHSA-2007-0014.html
- http://kbase.redhat.com/faq/FAQ_85_10846.shtm
- http://kbase.redhat.com/faq/FAQ_85_9610.shtm
- https://bugzilla.redhat.com/show_bug.cgi?id=213921
See VMware