Users Guide

NOTE:
• You can map only one virtual adapter to one server at a time.
• Without an appropriate license, you can unmap a VA–server assignment, or map the VA to the default serve, only.
• The default mapping is VA1–Server Slot 1, VA2–Server Slot 2, VA3–Server Slot 3, and VA4–Server Slot 4.
• If full height server is inserted, then the upper slot has the VA mapped to it while the bottom slot is still unmapped. For example, a
full height in slot 1 has VA1 assigned to slot 1 and VA3 is still unmapped.
• If the system has an enterprise license, then you can assign any one of the four VAs to a server slot. However, you can still map
one virtual adapter to one server at a time.
• Virtual adapter rules are applied to the external and integrated shared storage adapters.
To map or unmap a virtual adapter from a server slot:
1 In the left pane, click Chassis Overview > Storage > Setup > Virtualization.
The Storage Virtualization page is displayed.
2 To select the required type of assignment, from the Assignment Mode: Virtual Disks to Virtual Adapters table, select:
• Single Assignment — Select to assign one virtual disk to one virtual adapter.
• Multiple Assignment — Select to assign a virtual disk to multiple virtual adapters. Read the on-screen instructions before
selecting this option.
NOTE: Select the Multiple Assignment mode only when the servers have Cluster Services installed on them. Use of this
mode without Cluster Services may lead to corrupted or lost data.
NOTE: You can assign a virtual disk to multiple virtual adapters from CMC CLI even when the Assignment Mode is set to
Single Assignment in the CMC web interface.
3 In the Virtual Adapters Mapped table, from the Action drop-down list, select one of the following options, and then click Apply.
• <Slot #> — Select the slot to which the VA must be assigned.
• Unmap — Select to remove the VA assignment to a slot.
The VA is mapped or unmapped from the selected server slot, based on the selected action.
NOTE
: Consider a VA assigned to server in the lower slot (3 or 4). When a half height server (slot 3 or 4) is replaced with a
full height server, the full height server does not access the VA assigned to lower slots. Inserting a half height server again,
provides access to the VA.
Map or un-map a PERC Virtual Controller to blade:
• Each External Shared PERC 8 card has four virtual adapters (VA). If one or two External Shared PERC 8 cards are present in the
system, then in shared mode you can map or un-map one of the four virtual adapters’.
• If an external PCIE slot is occupied by shared adapter, the virtual adapter mapping can get the current details or information for VA
mapping of the shared storage VA pool.
• Shared device is not supported when the external PCIE slot is occupied by a shared adapter. Using the shared adapter, you can
support shared device by changing the shared storage VA pool.
Fault-Tolerance in Storage Controllers
High Availability (HA) in storage enables availability of multiple integrated components and multiple access points to storage resources. In
case a storage component stops functioning, the server is supported by a second critical component or path to the available data. High
Availability only minimizes downtime by restoring services behind the scenes, in most cases before the non-functionality is visible, but does
not eliminate downtime. Fault Tolerance (FT) makes use of redundant components within a storage system, which are congured to
behave as backup components and are kept in standby mode. Storage Controllers in fault-tolerant mode prevent disruption of storage
services and automatically take over the services of a component that has stopped functioning. Performance remains consistent
throughout this failover process since the redundant components(controllers) are not used during normal operating conditions.
High Availability with fault-tolerance provides the following benets:
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Managing Chassis Storage