Re: iSCSI linux raid target failure file system corruption testing problems.

[Mike Christie <michaelc@xxxxxxxxxxx>]

Brian Kerhin wrote:
>  
>
> I’ve setup an iSCSI network using the initiator (cent os 4.2)
>
> iscsi-initiator-utils-4.0.3.0-2
>
>  
>
> I have 4 targets and a RAID 6 array. (n-2 storage space, 2 targets can 
> die before I loose data)
>
>  
>
> My problem is that I loose data when 1 target dies.
>
>  
>
> Here is my procedure for test:
>
>  
>
>    1. Start iSCSI
>    2. Create raid 6 array.
>    3. format file system (ext3)
>    4. start 1.6GB copy of a usr directory. (/usr2 a copy of my /usr
>       directory)
>    5. While it the middle of the copy I pull the Ethernet cord from one
>       of my targets (simulate a failure J).
>    6. The copy locks up for a few seconds, the iscsi transfer processes
>       all top showing up in my top monitor. Then after about 7 seconds
>       they pop back up and my /proc/mdstat file shows my disk has failed.


Could you send your /var/log/messages output when this is going on.


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