FreeBSD 6.1 kernel panic

[freebsd at top-consulting.net]

   I have the following setup:

   3ware 9550SX-4LP raid card

   4x 500GB SATA HD's in Raid 10.

   It's running on: FreeBSD store01 6.1-RELEASE-p12 FreeBSD
   6.1-RELEASE-p12
   I use this machine mainly for backups and NFS mount points. The
   problem    the machine re   is:

   Mar 31 00:29:05 store01 syslogd: kernel boot file is
   /boot/kernel/kernel   Mar 31 00:29:05 store01 kernel: start = 0, len = 11431, fs =
   /usr
   Mar 31 00:29:05 store01 kernel: panic: ffs_alloccg: map corrupted
   Mar 31 00:29:05 store01 kernel: Uptime: 2d22h57m30s
   Mar 31 00:29:05 store01 kernel: Cannot dump. No dump device defined.
   Mar 31 00:29:05 store01 kernel: Automatic reboot in 15 seconds - press
   a ke
   This has been happening only since I started doing massive backups on
   th   fsck -y on t   errors" like: Mar 2   BLOCK COUNT I=28342913 (4
   The only other place where I've found a problem very similar to mine
   is:   irectories-on-large-UFS2--%3E-boom-t3203420.html  but that is on N   etBSD.

   Does anyone know if what I'm describing is a current bug in FreeBSD
   6.1 
   Thanks!


   
References

   1. 3D"http://www.nabble.com/kern-35580:-creating-directories-on-large