User's Manual

86 Glossary
patrol read rate
The user-defined rate at which patrol read operations are run on a computer
system.
physical disk (PD)
A non-volatile, randomly addressable device for storing data. Physical disks are
rewritable and commonly referred to as disk drives.
Physical Drive State
A physical drive property indicating the status of the drive. A physical disk can
be in one of the following states:
• Un-configured Good: A disk accessible to the RAID controller but not
configured as a part of a virtual disk or as a hotspare.
• Hot Spare: A physical disk that is configured as a hotspare.
• Online: A physical disk can be accessed by the RAID controller and will
be part of the virtual disk.
• Rebuild: A physical disk to which data is being written to restore full
redundancy for a virtual disk.
• Failed: A physical disk that was originally configured as Online or Hot
Spare, but on which the firmware detects an unrecoverable error.
• Un-configured Bad: A physical disk on which the firmware detects an
unrecoverable error; the physical disk was Un-configured Good or the
physical disk could not be initialized.
• Missing: A physical disk that was Online, but which has been removed
from its location.
• Offline: A physical disk that is part of a virtual disk but which has invalid
data as far as the RAID configuration is concerned.
• None: A physical disk with the unsupported flag set. An Un-configured
Good or Offline physical disk that has completed the prepare for
removal operation.
Physical Drive Type
A physical drive property indicating the characteristics of the drive.