Dell PowerVault MD3000 - Manual (Page 34)

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Using Your RAID Enclosure
Physical Disk States
The RAID controller module recognizes the physical disk states (mode and status reported in MD
Storage Manager) described in Table 3-1.
If a disk drive rebuild fails because of a source drive failure or because the drive is too small, the user
interface reports a failure of the physical disk even though the LED state on the drive indicates the
rebuild was aborted.
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.
Table 3-1. RAID Controller Physical Disk States
Status Mode Description Physical Disk Status LED
Indication
Optimal Unassigned The physical disk in the indicated slot is unused
and available to be configured. Steady Green
Optimal Assigned The physical disk in the indicated slot is
configured as part of a disk group. Steady Green
Optimal Hot Spare Standby The physical disk in the indicated slot is
configured as a hot spare. Steady Green
Optimal Hot Spare In Use The physical disk in the indicated slot is in use as
a hot spare within a disk group. Steady Green
Failed Assigned,
Unassigned, Hot
Spare In Use, or Hot
Spare Standby The physical disk in the indicated slot has been
failed because of an unrecoverable error, an
incorrect drive type or drive size, or by its
operational state being set to failed. Amber flashing (125 ms)
Replaced Assigned The physical disk in the indicated slot has been
replaced and is ready to be, or is actively being,
configured into a disk group. Green flashing (On
400 ms, Off 100 ms)
Pending
Failure Assigned,
Unassigned, Hot
Spare In Use, or Hot
Spare Standby A SMART error has been detected on the
physical disk in the indicated slot. Flashing Green, Amber,
and off
(none) (none) The indicated slot is empty, or the array cannot
detect the physical disk. Off