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a little help please...

every time the comannd "service iscsi restart" is issued on a RHL 5 Server access to the LUNs are lost, when we try to list the contents of the LUNs the following error comes up.

ls: reading directory .: Input/output error total 0.

can anyone explain this behavour? after the LUNs have been set up & mapped should we not issue that command at al?

thanks & Regards,

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Do you have device-mapper multipath set up? ... Also kernel messages might be helpful to diagnose the problem. –  Dmitri Chubarov Sep 14 '12 at 5:30
device-mapper multipath is not set up, two physical NICs have been binded into one... checking kernel messages... thanks. –  Vladimir Sep 14 '12 at 7:09
if there are relevant messages in dmesg output, could you please post them. I always mount iscsi targets via multipath mountpoints even if there exists a unique path. This guarantees at least protection from scsi device name changes. Could you run multipath, mount the nodes created under /dev/mapper instead of /dev/sdX nodes and check if the problem persists? –  Dmitri Chubarov Sep 14 '12 at 16:25
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