Fault Tolerance Features; Physical Disk Hot Swapping - Dell 6 series User Manual

Fault Tolerance Features

Table 3-3 lists the features that provide fault tolerance to prevent data loss in
case of a failed physical disk.
Table 3-3. Fault Tolerance Features
Specification
Support for SMART
Support for Patrol Read
Redundant path support
Physical disk failure detection
Physical disk rebuild using hot spares
Parity generation and checking (RAID 5, 50, 6, and 60 only) Yes
Battery backup of controller cache to protect data
Manual learn cycle mode for battery backup
Detection of batteries with low charge after boot up
a. Supported only on PERC 6/E adapters.
b. The PERC 6/i adapter supports a BBU on selected systems only. For additional information, see
the documentation that was shipped with the system

Physical Disk Hot Swapping

Hot swapping is the manual replacement of a defective unit in a disk
subsystem while the subsystem is performing its normal functions.
NOTE:
The system backplane or enclosure must support hot swapping for the
PERC 6 and CERC 6/i controllers to support hot swapping.
NOTE:
Replace a physical disk with a new one of the same protocol and
drive technology. For example, only a SAS HDD can replace a SAS HDD;
only a SATA SSD can replace a SATA SSD.
NOTE:
The replacement drive must be of equal or greater capacity than the one it
is replacing.
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About PERC 6 and CERC 6/i Controllers
PERC CERC
Yes Yes
Yes Yes
a
Yes N/A
Automatic Automatic
Automatic Automatic
Yes
b
Yes N/A
Yes N/A
Yes N/A