Users Guide
For more information, see the iDRAC RACADM CLI Guide available at https://www.dell.com/idracmanuals.
Rebuild Physical Disk
Rebuild Physical Disk is the ability to reconstruct the contents of a failed disk. This is true only when auto rebuild option is set to
false. If there is a redundant virtual disk, the rebuild operation can reconstruct the contents of a failed physical disk. A rebuild
can take place during normal operation, but it degrades performance.
Cancel Rebuild can be used to cancel a rebuild that is in progress. If you cancel a rebuild, the virtual disk remains in a degraded
state. The failure of an additional physical disk can cause the virtual disk to fail and may result in data loss. It is recommended to
perform a rebuild on the failed physical disk at the earliest.
In case, you cancel the rebuild of a physical disk that is assigned as a hot spare, reinitiate the rebuild on the same physical disk in
order to restore the data. Canceling the rebuild of a physical disk and then assigning another physical disk as a hot spare does
not cause the newly assigned hot spare to rebuild the data.
Managing virtual disks
You can perform the following operations for the virtual disks:
● Create
● Delete
● Edit policies
● Initialize
● Check consistency
● Cancel check consistency
● Encrypt virtual disks
● Assign or unassign dedicated hot spares
● Blink and unblink virtual disk
● Cancel background initialization
● Online capacity expansion
● RAID level migration
NOTE:
You can manage and monitor 240 virtual disks using iDRAC interfaces. To create VDs, use either Device Setup (F2),
PERCCLI command line tool, or Dell OpenManage Server Administrator (OMSA).
NOTE: PERC 10 count is less since it does not support daisy chain arrangements.
Creating virtual disks
To implement RAID functions, you must create a virtual disk. A virtual disk refers to storage created by a RAID controller from
one or more physical disks. Although a virtual disk may be created from several physical disks, it is seen by the operating system
as a single disk.
Before creating a virtual disk, you should be familiar with the information in Considerations Before Creating Virtual Disks.
You can create a Virtual Disk using the Physical Disks attached to the PERC controller. To create a Virtual Disk, you must have
the Server Control user privilege. You can create a maximum of 64 virtual drives and a maximum of 16 virtual drives in the same
drive group.
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>.
240
Managing storage devices