Fault-Tolerance Features; Table 8. Raid Level Migration - Dell POWEREDGE RADI H700 Technical Manual

Dell
Source RAID Target RAID
Level Level
RAID 0 RAID 1
RAID 0 RAID 5
RAID 0 RAID 6
RAID 1 RAID 0
RAID 1 RAID 5
RAID 1 RAID 6
RAID 5 RAID 0
RAID 5 RAID 6
RAID 6 RAID 0
RAID 6 RAID 5

Fault-Tolerance Features

4.5
Below is a list of features that provide fault tolerance to prevent data loss:

Non-volatile cache: extends data retention from hours to years

Support for SMART

Redundant path support (for PERC H800 only)

Physical disk failure detection
DELL PERC H700 and H800 Technical Guide
Table 8. RAID Level Migration
# of Physical # of Physical
Drives Drives (End)
(Beginning)
1 2
1 or more 3 or more
1 or more 4 or more
2 2 or more
2 3 or more
2 4 or more
3 or more 3 or more
3 or more 4 or more
4 or more 4 or more
4 or more 4 or more
Capacity Description
Expansion
Possible
No Converting non-
redundant virtual disk
into a mirrored virtual
disk by adding one drive.
Yes At least one drive needs
to be added for
distributed parity data.
Yes At least two drives need
to be added for dual
distributed parity data.
Yes Removes redundancy
while increasing
capacity.
Yes Maintains redundancy
while doubling capacity.
Yes Two drives are required
to be added for
distributed parity data.
Yes Converting to a non-
redundant virtual disk
and reclaiming disk space
used for distributed
parity data.
Yes At least one drive needs
to be added for dual
distributed parity data.
Yes Converting to a non-
redundant virtual disk
and reclaiming disk space
used for distributed
parity data.
Yes Removing one set of
parity data and
reclaiming disk space
used for it.
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