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From: "Lawrence Farr" <freebsd-stable@epcdirect.co.uk>
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Date: Mon, 20 Nov 2006 18:11:37 -0000
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Subject: ufs_dirbad: bad dir panic (Was Areca Weirdness)
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> > > >>
> > > >> I've got an Areca 12 port card running a 6Tb array which 
> > is divided
> > > >> into 2.1Tb chunks at the moment, as it was doing the 
> same with a
> > > >> single 6Tb partition.
> > > >>
> > > >> ad0: 58644MB <IC35L060AVER07 0 ER6OA44A> at ata0-master UDMA100
> > > >> da0 at arcmsr0 bus 0 target 0 lun 0
> > > >> da0: <Areca Arc1 R001> Fixed Direct Access SCSI-3 device
> > > >> da0: 166.666MB/s transfers (83.333MHz, offset 32, 16bit),
> > > >> Tagged Queueing
> > > >> Enabled
> > > >> da0: 2224922MB (4556640256 512 byte sectors: 255H 
> 63S/T 283637C)
> > > >>
> > > >> If I newfs it, and copy data to it, I have no problem 
> initially.

I can repeat this 100% now, by copying data onto the drive then unmounting
and remounting it. I have a core dump if anyone can tell me what info to
get from it:

  Version String: FreeBSD 6.2-PRERELEASE #0: Wed Nov 15 19:57:01 GMT 2006
    root@monitor.shorewood-epc.co.uk:/usr/obj/usr/src/sys/P6NOUSB
  Panic String: ufs_dirbad: bad dir