Users Guide

Table Of Contents
You cannot create a virtual disk if:
Physical disk drives are not available for virtual disk creation. Install additional physical disk drives.
Maximum number of virtual disks that can be created on the controller has been reached. You must delete at least one
virtual disk and then create a new virtual disk.
Maximum number of virtual disks supported by a drive group has been reached. You must delete one virtual disk from the
selected group and then create a new virtual disk.
A job is currently running or scheduled on the selected controller. You must wait for this job to complete or you can delete
the job before attempting a new operation. You can view and manage the status of the scheduled job in the Job Queue page.
Physical disk is in non-RAID mode. You must convert to RAID mode using iDRAC interfaces such as iDRAC web interface,
RACADM, Redfish, WSMan, or <CTRL+R>.
NOTE: If you create a virtual disk in Add to Pending Operation mode and a job is not created, and then if you delete the
Virtual disk, then the create pending operation for the virtual disk is cleared.
NOTE: RAID 6 and 60 are not supported in PERC H330.
NOTE: BOSS controller allows you to create virtual disk only of size equal to the full size of the M.2 physical storage media.
Ensure that you set the virtual disk size to zero when using the Server Configuration Profile to create a BOSS virtual disk.
For other interfaces such as RACADM, WSMan, and Redfish, the virtual disk size should not be specified.
Considerations before creating virtual disks
Before creating virtual disks, consider the following:
Virtual disk names not stored on controllerThe names of the virtual disks that you create are not stored on the controller.
This means that if you reboot using a different operating system, the new operating system may rename the virtual disk
using its own naming conventions.
Disk grouping is a logical grouping of disks attached to a RAID controller on which one or more virtual disks are created, such
that all virtual disks in the disk group use all of the physical disks in the disk group. The current implementation supports the
blocking of mixed disk groups during the creation of logical devices.
Physical disks are bound to disk groups. Therefore, there is no RAID level mixing on one disk group.
There are limitations on the number of physical disks that can be included in the virtual disk. These limitations depend on the
controller. When creating a virtual disk, controllers support a certain number of stripes and spans (methods for combining
the storage on physical disks). Because the number of total stripes and spans is limited, the number of physical disks that
can be used is also limited. The limitations on stripes and spans affect the RAID levels as follows:
Maximum number of spans affects RAID 10, RAID 50, and RAID 60.
Maximum number of stripes affects RAID 0, RAID 5, RAID 50, RAID 6, and RAID 60.
Number of physical disks in a mirror is always 2. This affects RAID 1 and RAID 10.
NOTE:
RAID 1 is only supported for BOSS controllers.
SWRAID controller only supports RAID 0, 1, 5 and 10.
Cannot create virtual disks on PCIe SSDs. But PERC 11 and later controllers support creating virtual disks using PCIe SSDs.
Creating virtual disks using web interface
To create virtual disk:
1. In the iDRAC Web interface, go to Storage > Overview > Virtual DisksAdvanced Filter.
2. In the Virtual Disk section, do the following:
a. From the Controller drop-down menu, select the controller for which you want to create the virtual disk.
b. From the Layout drop-down menu, select the RAID level for the Virtual Disk.
Only those RAID levels supported by the controller appear in the drop-down menu and it is based on the RAID levels are
available based on the total number of physical disks available.
c. Select the Media Type, Stripe Size, Read Policy, Write Policy, Disk Cache Policy, .
Only those values supported by the controller appear in the drop-down menus for these properties.
d. In the Capacity field, enter the size of the virtual disk.
The maximum size is displayed and then updated as disks are selected.
e. The Span Count field is displayed based on the selected physical disks (step 3). You cannot set this value. It is
automatically calculated after selecting disks for multi-raid level. Span Count field is applicable to RAID 10, RAID 50, and
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Managing storage devices