09-19-2011 01:21 PM
I can only see the new LUN after I disconnect and reconnect the fabric cable either on the server or on the switch. I am using 5100 switch and AMS 2100.
Or I have to reboot the server in order to see the new LUN.
Refresh does not help.
09-19-2011 01:31 PM
Usually a rescan would do the trick.
This happens if you reboot a machine, but most (if not all) Osses can rescan without rebooting.
You're saying you have to fisically ave to remove en reattach the fibers which should not be needed.
09-19-2011 02:19 PM
harish, i don't see any question marks in your message )
i'm sure that AMS is doing it's best to allow your host seeing any dynamic changes with the size and number of mapped LUNs -> in case if you configured the correct host mode and if you have a supported combination of OS level, HBA/firmware/drivers, and AMS microcode.
but... some HBAs really have to perform a fabric logout/login in order to see any disk changes. having said that, i mean that the disk array and the switch are not responsible for this. in this case, yes, sometimes you have to force this process, but usually it is enough to perform portdisable/portenable either on the HBA side or on the disk array side, instead of reconnecting the fabric cables or rebooting the devices.
09-19-2011 10:16 PM
in case of a shared storage port (multiple servers are connected to a single storgae port) it is a bad solution to disable the storage port.
As well it is also not best practise to disable the server port in case of no redundant paths. This should be mentioned as well.
I aggree under some condition you need a reboot.
09-21-2011 07:45 AM
Works perfectly with the other fabric that has 3900 switches and 9570 HDS storage.
Issue is with the new fabric that has 5100 switches and AMS2100 storage.
FOS is v6.4.1b
Host will not see the LUN assigned to it unless you either reboot the server, disable and enable the port either on the switch or HBA or disconnect the cable and reconnect the cable.
Once it can see the LUN, adding other new LUNs is not an issue.