>May I enquire as to the nature of the filesystems on these VMs?
>It surprises me that a sudden inability to write to the block device 
>beneath is causing such hassle at the FS layer, ext3 upward (as is 
>standard under RH) has a pretty robust journal system.
>
>Maybe I've just been extremely lucky :)

Linux has a "feature" where it flips the file system to Read-Only if it detects 
a write error.  I know it happens on ext4.  

Some UNIX systems mark the block as bad and keep running.


Craig

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