Assigning Luns To Storage Subsystems; About Read-Only Zones - HP Cisco MDS 9216 - Fabric Switch Configuration Manual

Advanced Zone Attributes
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m
Figure 30-37
Click either the WWN or FCID radio button from the Zone By options to create a LUN-based zone.
Step 4
Check the LUN check box and click the browse button to configure LUNS.
Step 5
Click Add to add this LUN-based zone.
Step 6

Assigning LUNs to Storage Subsystems

LUN masking and mapping restricts server access to specific LUNs. If LUN masking is enabled on a
storage subsystem and if you want to perform additional LUN zoning in a Cisco MDS 9000 Family
switch, obtain the LUN number for each host bus adapter (HBA) from the storage subsystem and then
configure the LUN-based zone procedure provided in the
page
Note Refer to the relevant user manuals to obtain the LUN number for each HBA.
Caution If you make any errors when assigning LUNs, you might lose data.

About Read-Only Zones

By default, an initiator has both read and write access to the target's media when they are members of
the same Fibre Channel zone. The read-only zone feature allows members to have only read access to
the media within a read-only Fibre Channel zone.
You can also configure LUN zones as read-only zones.
Any zone can be identified as a read-only zone. By default all zones have read-write permission unless
explicitly configured as a read-only zone.
Follow these guidelines when configuring read-only zones:
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•
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Cisco MDS 9000 Family CLI Configuration Guide
30-38
Add Member to Zone Dialog Box
30-37.
If read-only zones are implemented, the switch prevents write access to user data within the zone.
If two members belong to a read-only zone and to a read-write zone, the read-only zone takes
priority and write access is denied.
LUN zoning can only be implemented in Cisco MDS 9000 Family switches. If LUN zoning is
implemented in a switch, you cannot configure interop mode in that switch.
Read-only volumes are not supported by some operating system and file system combinations (for
example, Windows NT or Windows 2000 and NTFS file system). Volumes within read-only zones
are not available to such hosts. However, if these hosts are already booted when the read-only zones
are activated, then read-only volumes are available to those hosts.
The read-only zone feature behaves as designed if either the FAT16 or FAT32 file system is used
with the previously mentioned Windows operating systems.
Chapter 30 Configuring and Managing Zones
"Configuring a LUN-Based Zone" section on
OL-16184-01, Cisco MDS SAN-OS Release 3.x