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(Figure 3.6.6.2: UDV-01 is attached to LUN 0 with every host can access. UDV-02 is
attached to LUN 1 with only initiator node named “iqn.1991-05.com.microsoft:demo” can
access.)
· LUN operations description:
ATTACH Attach a logical unit number to a user data volume.
DETACH Detach a logical unit number from a user data volume.
The matching rules of access control are from top to down by sequence. For
example: there are 2 rules for the same UDV, one is “*”, LUN 0; the other is
“iqn.host1”, LUN 1. The other host “iqn.host2” can login because it matches the
rule 1.
The access will be denied when there is no matching rule.
3.6.7 Examples
The followings are examples for creating volumes. Example 1 is to create two
UDVs sharing the same CV (global cache volume) and set a global spare disk.
Example 2 is to create two UDVs. One shares global cache volume, the other
uses dedicated cache volume. Set a dedicated spare disk.
· Example 1
Example 1 is to create two UDVs in one VG, each UDV uses global cache
volume. Global cache volume is created after system boots up automatically. So,
no action is needed to set CV. Then set a global spare disk. The last, delete all of
them.
Step 1: Create VG (Volume Group).
To create the volume group, please follow the procedures:
Figure 3.6.7.1