Silicon Graphics TP9100, Installation Instructions And User Manual

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Configuration Functions
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Installing Device Drivers for New LUNS (Configuration Function Menu)
Selecting this item on the main menu (see “Main Menu” on page 21) instructs TPM to tell
the host computer to scan for new devices and update device drivers. To initiate this
process, click
Install device drivers for new LUNS on the main menu. The warning
screen shown in Figure 3-47 appears.
Figure 3-47 Install New Device Drivers Warning Screen
If you are running in a live environment with mounted LUNs, you need to be careful
about executing this feature. For example, if you changed SAN mapping so logical drive
#3 is mapped to LUN 0 instead of LUN 4, then you will make file systems disappear, and
confuse your device drivers. This should be expected, of course. As stated earlier, TPM
is not going to prevent you from doing something that would be detrimental to the
system configuration.
Also, if you have cross-linked or improperly defined device drivers, running this
function corrects the problem, but it also properly redefines drivers. This could also have
an effect on mounted devices. Below are some operating system-specific comments:
• Linux: RedHat 6.2 does not support scanning for new devices. A reboot is
recommended. However, if you manually remove your FC device driver, then
re-install it, new devices are discovered. This saves you the trouble of rebooting, but
the technique obviously can’t be used if other LUNs are active and mounted. After
unloading the FC driver module, perform a reload. You can select new LUNs,
which calls the
$DAM_HOME/damdevscan
shell script.
• IRIX: TPM calls the
$DAM_HOME/damdevscan
shell script.
If the new LUNs haven't been discovered, a system reboot may be required in order
to have the host recognize the new devices.
• Windows: A reboot is required after creating LUNs.