Managing Disks; Monitoring Raid Status On The Main Cmc Window - HP StorageWorks P4000 User Manual

In RAID 6, when RAID is degraded due to a single drive failure, the data is still not at risk for a second
failure. However, if it is degraded due to the failure of two drives, then data would be at risk if another
drive failed.
CAUTION:
In a degraded RAID 1 or RAID 10 configuration, loss of a second disk within a pair results in data
loss. In a degraded RAID 5 configuration, loss of a second disk results in data loss. In a degraded
RAID 50 configuration, loss of a second disk in a single RAID 5 set results in data loss. In a degraded
RAID 6 configuration, the loss of three drives results in data loss.
The RAID status is located at the top of the RAID Setup tab in Storage. RAID status also appears in
the Details tab on the main CMC window when a storage system is selected in the navigation window.
1. RAID status
Figure 11 Monitoring RAID status on the main CMC window
.
The status displays one of four RAID states.
• Normal RAID is synchronized and running. No action is required.
• Rebuilding A new disk has been inserted in a drive bay, or a hot spare has been activated, and
RAID is currently rebuilding. No action is required.
• Degraded RAID is degraded. A disk may have failed or have been removed from its bay.
For hot-swap storage systems, simply replace the faulty, inactive, uninitialized, or missing disk.
For non-hot-swap storage systems (IBM x3650) you must add a disk to RAID using Storage > Disk
Setup tab if you are inserting a replacement disk.
• Off Data cannot be stored on the storage system. The storage system is offline and flashes in the
navigation window.
• None RAID is unconfigured.

Managing disks

Use the Disk Setup tab to monitor disk information and perform disk management tasks as listed in
Table 13 on page 62.
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