Compaq StorageWorks 6000 - Virtual Library System Uživatelská příručka stáhnout pdf (Strana 310)

SolutionPossible causesSymptom

Use the VLS's LUN masking feature

to restrict the number of virtual

devices the host sees on the VLS FC

host ports, so it only sees the virtual

devices it needs to see. Then, use

the VLS's LUN mapping feature to

assign LUNs to the virtual devices

the host can see, such that the virtu-

al device LUN numbers include a

LUN0 and no gaps in the LUN

numbering. See LUN Masking

(v3.x) and LUN Mapping (v3.x) for

instructions.

Remove the gap in the LUN number-

ing by editing the host's LUN map-

ping (see LUN Mapping (v3.x)), or

if a virtual device has been des-

troyed on the VLS, creating a gap

in the LUN numbering, restart the

VLS device emulations. The VLS

firmware will reassign LUNs to the

virtual devices as necessary to re-

move any gaps in the LUN number-

ing. See Restarting VLS Device

Emulations.

There is a gap in the LUN number-

ing on the FC host port. Most oper-

ating systems will stop looking for

virtual devices on an FC host port

once a gap in the LUN numbering

is detected. For example, if LUN0,

LUN1, and LUN3 are mapped to

an FC host port, the operating sys-

tem will see LUN0 and LUN1.

When it does not find a LUN2, it

will assume there are no more

LUNs on the port and stop looking.

Troubleshooting310

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