Cisco UCS User Manual - Page 42
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RAID Configuration
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Table 7-1
Table 7-1
Status Condition
Online
Global Hotspare
Unconfigured Good
Ready
Offline
Unconfigured Bad
Foreign
Logical Disks Table
The logical disks pane in the RAID Configuration page displays the information about the logical disks.
Table 7-2
Table 7-2
Option
ID
Size
Primary RAID
level
Secondary
RAID Level
Stripe size
Read policy
Cisco UCS Server Configuration Utility, Release 5.0
7-2
Link Speed—The link speed of the controller.
Logical Disk—The logical disk to which the physical disk belongs to.
describes the various disk status conditions.
Disk Status Conditions
Description
The drive is already used in another array.
The drive will be used to repair any array in the system that had a drive
failure, if the failed drive is equal to, or smaller than the hot spare drive.
The drive is unused or available.
The drive is online and operating correctly.
The drive is offline or absent. No actions can be performed on the drive
until it is back online.
The drive is not operational and needs to be replaced.
Disks with a status of "Unconfigured bad" cannot be used for RAID
configurations.
The drive is part of an array created on a different controller, or created
within one enclosure and moved to another on the same controller. It can
be used to create a new array after clearing the configuration.
explains the RAID array attributes.
RAID Array Attributes
Description
Unique ID to the logical disk.
Logical drive size. The maximum value depends on RAID level selected and the
physical disks size involved.
RAID 0 (Data striping), 1 (Disk Mirroring), 5 (Data Striping with Striped
Parity), 6 (Distributed Parity and Disk Striping).
Applicable only for nested RAID levels.
Size of the data stripe across all disks. Each physical disk has a smaller stripe
of data. The sum of all the stripes equals the stripe size.
No Read Ahead, Read Ahead, Adaptive. Read Ahead will read additional
consecutive stripes. Adaptive will turn on Read Ahead for sequential reads and
turn it off for random reads.
Chapter 7
Configuring RAID Levels
OL-32096-01