RAID and NFS exports (Possible Data Corruption)
From: Sumit Shah (shah_at_ucla.edu)
Date: 07/15/03
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Date: Tue, 15 Jul 2003 06:26:24 -0700 To: freebsd-hackers@freebsd.org
FreeBSD hackers,
Here is a message I sent to freebsd-questions and I was hoping I could
get some help debugging this.
Thanks
> FYI the only way I could recover the partitions semi successfully was
> rebuilding the arrays identically and then use gpart to recover the
> partition info. This would last for anywhere between 1-5 hours before
> the array would get broken. The only thing that changed on both
> systems when things started acting up was the addition of the line to
> /etc/exports.
>
> What would be the most appropriate list to further get info on to the
> cause of this. My best guess is there is a glitch in the HPT374
> controller or a bug in the FreeBSD driver.
>
> Thanks,
> Sumit
>
>
> On Friday, July 11, 2003, at 03:34 PM, Sumit Shah wrote:
>
>> Dear FreeBSD gurus,
>>
>> I apologize in advance if this is not the most appropriate list to
>> post this to, but this seems the best that I can find. Here is my
>> situation, we have an Abit AT7 motherboard with onboard RAID
>> (HPT374). It has worked beautifully for us with FreeBSD 4.7 and then
>> 4.8 for a good 8 months or so serving up NFS and Samba. This morning
>> my /etc/exports looked something like
>>
>> /data6 machine1 machine2 -mapall=65534
>> /data8 machine1 machine2 -mapall=65534
>>
>> I then added a line so it looked something like:
>>
>> /data6 machine1 machine2 -mapall=65534
>> /data8 machine1 machine2 -mapall=65534
>> /data6 -network 10.10.10 -mask 255.255.255.0 -mapall=65534
>>
>> I sent a HUP to mountd and everything seemed to work fine. Then I
>> started getting errors similar to:
>>
>> ad4: hard error reading fsbn 242727552
>>
>> So I rebooted and the HPT374 controller was complaining that the
>> first disk in the RAID-0 configuration failed. I thought this might
>> be a bad disk, but we had an identical system with the same EXACT
>> configuration and we started mountd on that with the same exports
>> file from above. A minute or two later the same type of errors and
>> same complaint by the HPT374 controller about the first disk in the
>> RAID-0 array being bad.
>>
>> I was wondering if there is any, no matter how remote, possibility
>> that by adding that third line to the exports file that the raid-0
>> got corrupted somehow and if so how to maybe reverse it. I have left
>> everything else intact nothing has changed on the controller side or
>> freebsd config.
>>
>> Just as a note, we are not using vinum, but using the created array
>> (ar0) and formatting that as UFS.
>>
>> Thanks so much for getting thorugh this email!
>>
>> Sumit
>>
>> _______________________________________________
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>> http://lists.freebsd.org/mailman/listinfo/freebsd-questions
>> To unsubscribe, send any mail to
>> "freebsd-questions-unsubscribe@freebsd.org"
>>
>
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