Understanding physical disks – Dell PowerEdge RAID Controller S110 User Manual
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Appendix B
• Hot Spare: A physical disk that is assigned as a dedicated or global hot
spare.
Virtual Disk States
• Degraded: A physical disk in a redundant virtual disk has failed. Additional
failures might result in loss of data.
•
Failed: One or more physical disks have failed. The virtual disk has gone
offline. The virtual disk cannot restore the data.
•
Non-RAID: A Non-RAID physical disk is automatically linked to a Non-
RAID virtual disk for use with a PERC S110 adapter.
•
Normal: A virtual disk has been created and its preparation process has
been completed.
•
Ready: A redundant virtual disk has been created, and is ready for
additional preparation.
Understanding Physical Disks
Physical Disk States
Within the management applications, physical disks can be part of one or
more virtual disks and can exist in the states indicated:
Rescanning Physical Disks for Changes in State
The physical disk information displayed at the PERC BIOS Configuration
Utility is the state of the physical disks when they were last scanned. If a
rescan has not been performed, the information displayed is the state of the
physical disks at boot time.
Table 1-2. Minimum and Maximum Physical Disk Configurations
RAID Level Minimum Number of Physical Disks Maximum Number of Physical Disks
RAID 0
2
4
RAID 1
2
2
RAID 10
4
4
RAID 5
3
4
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