Dell PowerVault MD1120 - Manual (Page 32)

32
Installing Enclosure Components
6 Push the physical disk carrier into the slot until the bottom of the open
carrier handle makes contact with the chassis face plate.
7 Rotate the carrier handle to the closed position while continuing to push
the carrier into the slot.
The status LED indicator (see Table 1-3 for description) will display a
steady green if the physical disk is inserted properly. If the indicator is not
illuminated, see "Troubleshooting Physical Disks" on page 49.
As the physical disk rebuilds, the physical disk carrier LED flashes green
twice per second at unequal intervals.
NOTE:
At least two physical disks must be installed in the enclosure.
Removing and Installing an EMM
An enclosure with redundant enclosure management contains two EMMs
and can be configured in either a unified mode or split mode. An enclosure
with nonredundant enclosure management consists of one EMM configured
in unified mode.
If only one EMM is installed in your enclosure, the empty slot must contain a
blank cover. The blank cover ensures that the enclosure has the proper cooling
airflow to prevent overheating. For information on installing the blank cover,
see "Installing an EMM Module Cover in an Empty Bay" on page 34.
CAUTION:
Only trained service technicians are authorized to remove the system
cover and access any of the components inside the system. Before you begin this
procedure, review the safety instructions that came with the system.
NOTICE:
EMMs can be removed and installed without shutting down the
enclosure. However, removing an EMM while data traffic is occurring that involves
that EMM could cause data loss and is not recommended. Replacing or reinserting
an EMM that is connected to a host will cause the host to lose communication with
the enclosure and will require a reboot of the host server. For more information, see
"Troubleshooting a Loss of Communication Condition" on page 43.
NOTICE:
To prevent damage to your enclosure, you should wear a wrist grounding
strap while performing the following procedures. See the safety information that is
provided with your system.