Cisco UCS User Manual - Page 43

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Cisco UCS User Manual
Chapter 7
Configuring RAID Levels
Table 7-2
Option
Write policy
Cache policy

Configuring RAID Arrays

Only unconfigured good disks can be used for RAID configuration. Disks that are already part of RAID
are not available for RAID configuration.
To create custom or multiple RAID arrays, follow these steps:

Step 1

Click Server Configuration in the left navigation pane and then click RAID configuration.
The RAID Configuration page displays with the list of physical disks and logical disks.
Step 2
Click the Configure RAID icon on the top-right of the page.
The RAID Configuration page appears.
Step 3
From the RAID level drop-down list, select one of the following RAID levels:
•
•
Note
•
•
Step 4
Click Create Array.
Note
A progress bar is displayed and then a RAID Configuration dialog box appears depicting the completion
of a RAID configuration.
Step 5
Click OK.
The RAID Configuration page appears. You can view the following:
•
•
•
OL-32096-01
RAID Array Attributes
Description
Write Through or Write Back. With Write Through, I/O completion for write
operations is signaled when the data is written to the disk. With Write Back, I/O
completion is signaled when the data is transferred to cache.
Direct I/O or Cached I/O. Choose Direct I/O for unchecked read and write
operations. Choose Cached I/O to cache all write operations and check the
cache first for read operations.
Automatic Setup without Redundancy, page 7-4
Automatic Setup with Redundancy, page 7-4
The automatic setup with or without redundancy overrides all the existing RAID arrays.
Single-Level RAID Configuration, page 7-5
Nested RAID Configuration, page 7-5
The Create Array button is enabled only if the minimum required number of drive groups are
created.
The drive group information is displayed in the Logical Disks table.
The physical disks information is displayed in the Physical Disks table.
The status of the physical disks that are part of the drive group changes to Online and the status of
the backup physical disk changes to Hot spare.
Cisco UCS Server Configuration Utility, Release 5.0
RAID Configuration
7-3