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From: Tomi Vainio - Sun Finland - <Tomi.Vainio@Sun.COM>
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Date: Fri, 22 Dec 2000 16:01:05 +0200
To: freebsd-current@FreeBSD.ORG
Cc: msmith@FreeBSD.ORG
Subject: ffs_valloc: dup alloc panics with stable/current
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Tomi Vainio - Sun Finland - writes:
 > 
 > We got old Mylex DAC960PD-Ultra-raid-adapter and have tried to use it
 > with FreeBSD 4.2-stable and 5.0-current. Adapter is configured with
 > three luns 5+5*9G, 8+8*9G (raid5) and 1+1*2G (mirrored boot disk).
 > All 9G disks are quite old Seagate Barracuda 9 disks ST19171W.  System
 > is working quite well but under heavier load we start to get scsi
 > errors from luns.
 > This is not so bad but 5-30 minutes after this command system will
 > always panic.
 > cd /uu ; dump 0buf 126 - /w | restore xbf 126 -
 > 
 > mode = 0100644, inum = 720391, fs = /uu
 > panic: ffs_valloc: dup alloc
 >
Hi,

I wrote about these problems two weeks ago.  After this we had done
lot of testing with this system and last 4 days system has been up and
running.  We still get scsi errors but it doesn't seem to harm system
drives.  Panic problem hasn't appeared since we changed mylex config.
Now we are running only 8 disks on two channels and one raid5 system
drive on both.  Any thoughts why this works better than the old
configuration?

  Tomppa
-- 
SUN Microsystems Oy PL 112, Lars Sonckin kaari 12, 02601 ESPOO, Finland
Tomi Vainio (System Support Engineer)     +358 9 52556300 hotline
email: Tomi.Vainio@Sun.COM                +358 9 52556252 fax


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