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From: Don Bowman <don@sandvine.com>
To: Don Bowman <don@sandvine.com>,
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Date: Fri, 5 Mar 2004 00:34:17 -0500 
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Subject: RE: panic: ffs_blkfree: freeing free block
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From: Don Bowman [mailto:don@sandvine.com]
> periodically (once a day or so), i'm getting a panic
> as 'panic: ffs_blkfree: freeing free block'. 

sorry to follow up my own message...
subsequently the machine sometimes goes berserk with:
bad block -1428886735890689256, ino 2049427
bad block 8442294558658211815, ino 2049427

to the serial console.