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Date:      Mon, 3 Dec 2001 20:59:59 +1100
From:      "Tim" <timmcm@optushome.com.au>
To:        <freebsd-questions@FreeBSD.ORG>
Subject:   strange kernel panics under high disk i/o - ffs_blkfree
Message-ID:  <EFEMJNJMJJDEJPHJFNAAMEDMGHAA.timmcm@optushome.com.au>

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Hi All,

Im wondering whether any one has got a solution to this problem
I have found plenty of info about it in google groups etc.. but cant seem to
find a solid fix

We are running FreeBSD 4.3 with the following hardware:

Gigabyte  GA-6EXDR MB (with on board LSI SCSI card disabled in the bios for
FreeBSD incompatability problems)
Adaptec 29160 SCSI card
3 X Seagate 73 GIG SCSI ST373405LC HDD
All in a 1ru chasis


and get these errors

dev = #da/0x20004, block = 43584, fs = /disk/00
panic: ffs_blkfree: freeing free block
mp_lock = 00000001; cpuid = 0; lapic.id = 00000000
boot() called on cpu#0

syncing disks... 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3
giving up on 3 buffers
Uptime: 25d5h24m50s


We updated to the latest mother board bios , and the problem is still as
often , but now its a new error

This is under exactly the same circumsances


/kernel: panic: ffs_clusteralloc: map mismatch
/kernel: mp_lock = 00000001; cpuid = 0; lapic.id = 00000000
/kernel: boot() called on cpu#0
/kernel:
/kernel: syncing disks... 155 155 74 39 35 35 35 35 35 35 35 35 35 35 35 35
35 35 35 35
/kernel: giving up on 25 buffers
/kernel: Uptime: 2h30m20s
/kernel: Automatic reboot in 15 seconds - press a key on the console to
abort

This is fairly random (it could be up for 2 hours or 2 days)
It just doesnt happen on one machine  it happens on up to 10 seperate we
have (all the same hardware)
But happens always with high SCSI I/O and writing big files
We can simulate it fairly easily testing with Bonnie writing 1-2 gig files
I have tried FreeBSD 4.4 with no difference plus different revisions of
adaptec 29160 card
Also with soft updates on or off

Any ideas
Please email me if you want further info

Thanks
Tim


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