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Freenas iscsi volume corruption

Posted on 2012-04-02
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Last Modified: 2012-06-21
Hi there

I have the following environment:

Freenas 8.0.3 sharing an ISCSI target to a Windows server 2008 R2 64bit server, I am using the windows iscsi target software built in to windows.

I have connected it up and an running file transfers to the volume. Everything works ok, for a while.

Windows gives me this error:

"The file or directory is corrupt or unreadable"

and the logs on the freenas server show:


apr 2 13:25:11 ****-bsd-nas1 istgt[2965]: istgt_iscsi.c: 777:istgt_iscsi_write_pdu_internal: ***ERROR*** iscsi_write() failed (errno=32)
Apr 2 13:25:11 ****-bsd-nas1 istgt[2965]: istgt_iscsi.c:3518:istgt_iscsi_task_response: ***ERROR*** iscsi_write_pdu() failed


I also have an ESX 4.1 server using this freenas for ISCSI storage, and this is not having any issues.

If I run a repair on the volume, it is accessible and usable again until the next instance of this error. Any ideas?
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Question by:alexanderfoti
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by:noci
ID: 37799771
Are you aware of this freenas ticket: [ it seem related ]
http://support.freenas.org/ticket/1104

Which seems to hint at capacity problems.
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by:alexanderfoti
ID: 37799801
Many thanks, I have had a look at that, and have gone through the diagnostics outlined in the ticket.

My box is considerably more powerful (2x 3.2ghz xeon's), also my disk latency never seems to go above 3ms
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noci earned 500 total points
ID: 37802852
And how about the network? Switches? autonegotiate vs. fixed speed/duplex?
if auto negotiate, are settings correct at both ends of a cable.
Is iscsi over a separate [V]LAN?[better] or mixed with other traffic.
Is flowcontrol disabled?
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by:alexanderfoti
ID: 37834551
The networks are seperate, switches are set to 1000 meg full duplex and flow control was disabled, but the volumes kept corrupting, we are now running server 2008 on our Storage server and this has resolved all problems. It seems as though the IET Iscsi implementation is not reliable. :(
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