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Mapping
The Mapping page of the SNC Manager interface shows you the current mapping. When you hover the
mouse over a particular device, the following information about the device is displayed:
•
Bus number
•
Target ID
•
LUN number
•
Device Type
•
Vendor ID
•
Product Name
•
Firmware Revision Number
•
Serial Number
If you change the SCSI IDs of tapes or the library attached to the SNC
CAUTION
after setting up the SNC the first time, you must map the devices
again using the SNC Manager Mapping page.
Device mapping is the process of defining what storage devices, tape drives, and changers hosts can
access through the SNC. Hosts determine available storage using a device map stored on the SNC. The
device map routes all commands from the SNC iSCSI address to the appropriate SCSI device. This
mapping needs to be defined when the SNC is first set up. See
Figure 10
Physical and Virtual Connection Possibilities With the SNC
The device map is persistent across reboots, so storage will always be presented at the same LUN ID until
the map is adjusted. If a storage device is off-line when device discovery occurs, its LUN ID will be reserved
so that when it comes back online, it will retain the same ID. When adding new storage devices, the device
map needs to be redefined.
SCSI devices are mapped using the designations for the SCSI bus, target and LUN.
SNC 450x User's Guide
Figure
10.
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