Users Guide

You can assign only 4K drives as hot spare to 4K virtual disks.
If you have assigned a physical disk as a dedicated hot spare in Add to Pending Operation mode, the pending operation is created but a job
is not created. Then, if you try to unassign the dedicated hot spare, the assign dedicated hot spare pending operation is cleared.
If you have unassigned a physical disk as a dedicated hot spare in Add to Pending Operation mode, the pending operation is created but a
job is not created. Then, if you try to assign the dedicated hot spare, the unassign dedicated hot spare pending operation is cleared.
NOTE: While the log export operation is in progress, you cannot view information about dedicated hot spares on the
Manage Virtual Disks page. After the log export operation is complete, reload or refresh the Manage Virtual Disks page
to view the information.
Rename VD
To change the name of a Virtual Disk, the user must have System Control privilege. The virtual disk name can contain only alphanumeric
characters, spaces, dashes and underscores. The maximum length of the name depends on the individual controller. In most cases, the
maximum length is 15 characters. The name cannot start with a space, end with a space, or be left blank. Every time a virtual disk is
renamed, an LC Log gets created.
Edit Disk capacity
Online Capacity Expansion (OCE) allows you to increase the storage capacity of selected RAID levels while the system remains online. The
controller redistributes the data on the array(called Reconfiguration), placing new space available at the end of each RAID array.
Online Capacity Expansion (OCE) can be achieved in two ways:
• If free space is available on the smallest physical drive on the virtual disks group after starting LBA of Virtual disks, the virtual disk´s
capacity can be expanded within that free space. This option allows you to enter the new increased virtual disk size. If disk group in a
virtual disk has space available only before starting LBA, then Edit Disk Capacity in same disk group is not permitted even though there
is Available Space on a physical drive.
• A virtual disk's capacity can also be expanded by adding additional compatible physical disks to the existing virtual disk group. This
option does not allow you to enter the new increased virtual disk size. New increased virtual disk size is calculated and displayed to the
user based on the used disk space of existing physical disk group on a particular virtual disk, existing raid level of the virtual disk and
the number of new drives added to the virtual disk.
Capacity Expansion allows user to specify the final VD size. Internally final VD size is conveyed to PERC in percentage (this percentage is
the space user would like to use from empty space left in the array for the local disk to expand). Because of this percentage logic final VD
size after reconfiguration completes may be different from what user provided for scenario where user is not giving maximum VD size
possible as the final VD size (percentage turns out to be less than 100%). User does not see difference in this entered VD size and final VD
size after reconfiguration, if maximum possible VD size is entered by user.
Raid Level Migration
RAID Level Migration (RLM) refers to changing a virtual disk´s RAID level. iDRAC9 provides an option to increase the VD size using RLM.
In a way, RLM allows migrating the RAID level of a virtual disk which in turn may increase the size of virtual disk.
RAID level migration is the process of converting a VD with one RAID Level to another. When you migrate a VD to a different Raid Level,
the user data on it is redistributed to the format of the new configuration.
This configuration is supported by both staged and realtime.
The below table describes possible reconfigurable VD layouts while reconfiguring (RLM) a VD with addition of disks and without addition
of disks.
Table 54. Possible VD Layout
Source VD Layout Possible target VD Layout with Disk
Add
Possible target VD Layout Without disk
addition
R0 (single disk) R1 NA
R0 R5/R6 NA
R1 R0/R5/R6 R0
R5 R0/R6 R0
R6 R0/R5 R0/R5
Managing storage devices 213