User's Manual

Chapter 8 Troubleshooting
Duplicate Medium Changers Discovered
Scalar i500 User’s Guide 332
• If only one host is connected to a target port, you can use channel
zoning to tell the target port which devices to see (see Configuring FC
I/O Blade Channel Zoning on page 105).
• If more than one host is connected to a target port, you can use host
mapping to tell each host which devices to see (see Configuring Host
Mapping on page 111).
Duplicate Medium Changers Discovered
You may see one or more medium changers being discovered multiple
times. For information on why this happens, see FC I/O Blade Internal
Virtual Port for Medium Changers on page 104.
To prevent this, do the following:
• Ensure that host mapping is enabled (see Enabling/Disabling FC
Host Mapping on page 107).
• Assign each medium changer a unique LUN and map each one to the
appropriate host (see Configuring Host Mapping
on page 111).
Identifying Tape Drives
You can use the operator panel and the web client user interfaces to view
information about all tape drives installed in the library. In addition, you
can identify tape drives, including the control path tape drive, in selected
partitions. The web client also allows you to identify tape drives that are
not assigned to specific partitions. On the web client, you can only
identify tape drives that are in a ready state.
The operator panel
Drive Information screen lists the following
information for each tape drive:
• Control path tape drive status — yes/no
•Vendor