I apologize if this has been asked in the list before, I did some
research but did not find a clear answer/recommendation.
Currently, I use udev to monitor new devices added by the open-iscsi
initiator. This works great. However, when the target is disconnected I
get timeout messages in the kernel log but the device nodes in /dev/
still exists. Thus, no udev events.
As noted in a few of the messages in the archives, doing a rescan does
not automatically delete the LUNs. So the following script was
suggested:
scsi_sz=`sg_readcap /dev/sdko | grep address | sed s'/.*blocks=//'`
kernel_sz=`cat /sys/block/sdko/device/block\:sdko/size`
if (($scsi_sz==$kernel_sz)); then
echo "Good."
else
echo "Do the deletion of the block device."
echo 1 > /sys/block/sdko/device/delete
fi
This looks like it will do the trick. But I am wondering if this is still
the recommended approach as the above suggestion was made in 2008.
Thanks,
Amit
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