Dell PowerVault DL2000 - Manual (Page 32)

• Dell Management Console — The Dell Management Console (DMC) centrally monitors the status of Dell
systems. For more information about installing and using DMC, see the Dell Management Console User’s Guide
at support.dell.com/manuals.
Recovering From Single Disk Failures
After you replace the failed disk drive within a RAID group, the appliance automatically rebuilds the disk group. The data
on the virtual disks that reside on the disk group is still available to the appliance and the appliance runs without any
interruption. The appliance operates in degraded mode until the rebuild operation is complete.
CAUTION: If a disk fails in the same RAID 1 or RAID 5 disk group during the rebuild operation, data loss occurs.
Use Server Administrator to monitor the progress and status of the RAID rebuild. If the rebuild does not begin
automatically, see the
Dell OpenManage Server Administrator User’s Guide at support.dell.com/manuals to initiate the
rebuild manually. Server Administrator reports the status and progress of a rebuilding RAID group.
Recovering From Multiple Disk Failures
Data loss occurs if both disks in the RAID 1 group fail, two or more disks in a RAID 5 group fail, or three or more disks in
a RAID 6 group fail. After replacing the failed disks, depending on which RAID group failed, choose from the following
methods, to complete the recovery:
• Server disk group failure — The server RAID 1 group contains the operating system, CommVault Simpana, and
the DL Backup to Disk Appliance applications. See the System Recovery Map and follow the steps for the
operating system failure type. If the optional internal backup data RAID disk group fails, follow the procedure
below for storage array disk group failure.
• Storage array disk group failure — You can restore the backup sets archived to tape. Backup sets can also be
restored from a secondary appliance protecting the primary appliance. For more information about disaster
planning recovery procedures, see the CommVault Simpana Backup and Recovery documents.
Replacing Disks
When replacing disks, use only supported disks identified in the Dell PowerVault DL Backup to Disk Appliance
Interoperability Guide . Ensure that you replace the failed disk with a new disk of the same or greater capacity. If drives
of greater capacity are used, some usable disk space is lost in the RAID configuration. You can replace:
• Internal disks — To replace the appliance's internal disks, see the Dell PowerVault DL2x00 Hardware Owner's
Manual at support.dell.com/manuals.
• Disks in a storage enclosure — To replace disk drives in a storage enclosure, see the storage enclosure’s
Hardware Owner’s Manual at support.dell.com/manuals.
Reinstalling The Operating System
The operating system is preinstalled on the appliance. Perform the following procedure to reinstall the operating system.
Using The Dell Systems Build And Update Utility To Manually Recover The Operating
System
To reinstall the operating system, use the Dell Systems Build and Update Utility (SBUU) on the Dell Systems
Management Tools and Documentation media. The SBUU installs the operating system software and device drivers.
32