[CentOS] How to force iscsi to see the new LUN size

[Joseph L. Casale]

>never tried this on iscsi, but it may well work...
>
>echo "B T L" > /sys/class/scsi_host/hostH/scan
>
>where B T L are B, T, L, are the bus, target, and LUN IDs, and hostH is 
>the Host.

Just to further this:
http://www.linuxjournal.com/article/7321

And I don't think tgt or iet can detect a change in the backing device
w/o a restart, I recall iet having active work taking place on this atm...