Chapter 8. Storage pools 355
After the action has been completed successfully, the MDisk can be found in the SSD tier
(Figure 8-53).
Figure 8-53 The chosen tier has been assigned to the MDisk
The action we just performed instructs the system to use mdisk7 as a faster disk. IBM Flex
System V7000 Storage Node will then move highly used storage extents to this MDisk.
8.2.5 Additional actions on MDisks
Here are some of the additional actions that can be performed on MDisks. Such actions can
be performed by clicking Pools MDisks by Pool Actions or right-clicking the selected
MDisk:
Detect MDisks: The Detect MDisks button at the upper left of the MDisks by Pools
window is useful if you have external storage controllers in your environment. The Detect
MDisk action initiates a rescan of the Fibre Channel network. It discovers any new MDisks
that have been mapped to the IBM Flex System V7000 Storage Node storage system, and
rebalances MDisk access across the available controller device ports. This action also
detects any loss of controller port availability, and updates the IBM Flex System V7000
Storage Node configuration to reflect any changes.
When external storage controllers are added to the IBM Flex System V7000 Storage Node
environment, IBM Flex System V7000 Storage Node automatically discovers the
controllers and the LUNs that are presented by those controllers are listed as unmanaged
MDisks. However, if you have attached new storage and IBM Flex System V7000 Storage
Node has not detected it, you might need to use the Detect MDisk button before the
system detects the new LUNs. If the configuration of the external controllers is modified
afterward, IBM Flex System V7000 Storage Node might be unaware of these configuration
changes. Use the Detect MDisk button to rescan the Fibre Channel network and update
the list of unmanaged MDisks.
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