28
Using Your RAID Enclosure
Self-Monitoring Analysis and Reporting Technology (SMART)
Self-Monitoring Analysis and Reporting Technology (SMART) monitors the internal performance of all
physical disk components to detect faults indicating the potential for physical disk failure. SMART uses
this information to report whether failure is imminent so that a physical disk can be replaced before
failure occurs. The RAID controller monitors all attached drives and notifies users when a predicted
failure is reported by a physical disk.
Virtual Disks and Disk Groups
When configuring a storage array, you would normally proceed in this order:
•
Organize the physical disks into disk groups.
•
Create virtual disks within these disk groups.
Table 3-1.
RAID Controller Physical Disk States
Mode
Status
Description
Unassigned or
Standby
Optimal
RAID controller module can access a physical disk,
but the physical disk is not configured as part of a
virtual disk or disk group.
Assigned
Optimal
RAID controller module can access a physical disk
and the physical disk is configured as part of a
virtual disk or disk group.
Assigned,
Unassigned, In Use,
or Standby
Failed
A physical disk was either part of a virtual disk, a
hot spare, or was unconfigured. RAID controller
module can no longer access the physical disk
because it has detected an unrecoverable error on
the physical disk.
Hot Spare In Use or
Replaced
Optimal
RAID controller module is writing to a physical
disk to restore full redundancy to a virtual disk.
(none)
(none)
RAID controller module can no longer detect a
physical disk that is part of a virtual disk because
the physical disk has been physically removed from
its slot.
Hot Spare Standby
Optimal
RAID controller module has configured a physical
disk as a hot spare.
Unassigned
Failed
The physical disk is unsupported.
Assigned
Offline
The physical disk is not available for any
operations. The physical disk can transition to an
offline state only if its disk group is marked offline.
Summary of Contents for PowerVault MD3000
Page 68: ...68 Troubleshooting Your Enclosure ...
Page 100: ...100 Glossary ...