Chapter 1: Introduction
1.5
applies to the metal cover for the empty BBU bay. Please do not
d the BBU module for installation.
1.5.1
onfigured to, the maximum number of drives
which can fail without leading to the loss of data will differ. Please
s
elow.
Hot-swappable
Components
Proper subsystem cooling is referred to as “normalized” airflow.
Normalized airflow ensures sufficient cooling of the subsystem and is
only attained when all components are properly installed. Therefore,
a failed component should only be hot-swapped when a replacement
is available. If a failed component is removed but not replaced,
permanent damage to the subsystem can result. This rule also
remove it unless you have prepare
Hot-swap
Capabilities
The subsystem protects data written on hard disk drives. A failed
drive can be replaced while the subsystem is online without affecting
the operational integrity of the subsystem. Depending on the RAID
level your array is c
ee the table b
RAID Level
Max. No. of Failed Drives
RAID 0
No fault tolerance
RAID 1
multiple (only if any two are not in a
rrored pair)
mi
RAID 3/5
1
RAID 6
2
Most major components, such as power supplies and cooling
modules, can be replaced online to eliminate the chance of down
odule failure.
1.5.2
able:
dules
(S12E-G1133-2)
Hard
drives
time caused by single m
Components
The following components are hot-swapp
•
Controller module (S12E-R1132-4)
•
Cooling
mo
•
BBU(s)
•
PSUs
•
1-19