Grass Valley K2 Level 2 RAID Oct.10 2006 - Manual (Page 48)

48 Level 2 RAID Instruction Manual September 8, 2006
Chapter 3 Servicing the K2 Level 2 RAID
• The disk module must be unbound.
• Moving a drive module that is part of a LUN to another slot makes all information
on the LUN inaccessible.
• You must remove and install the disk module while the storage system is powered
up.
A disk module must be inserted all the way or removed entirely. Do not leave a disk
module partially removed except for periods when you are allowing it to spin down.
When replacing multiple disks, observe the following:
• The RAID chassis configuration information is written to the first three disk
modules. If all of these disk modules are replaced with new devices with the power
supplies turned off, the information is lost. This condition is indicated by the
SERVICE LED blinking at a high rate at chassis power up. Therefore, do not
replace the first three disk modules with the power supplies turned off.
• When multiple disk modules are subject to replacement, they must be replaced
with new disk modules one by one. Do not replace multiple disk modules
simultaneously. After checking that the Ready LED on the front panel of the
current disk module is lit, commence replacing the next disk module.
• Stick on the physical label indicating the installation position on each newly
installed disk module.
• If both disk modules in 16 and 29 (or 17 and 30) in the expansion chassis are
defective or uninstalled, the Service LED on the expansion chassis and the Fault
LED on the expansion adapter will go off. In this case, first install a sound disk
module in 16 or 29 (or 17 or 30). If the expansion adapter operates normally, the
Service LED on the expansion chassis and the Fault LED on the expansion adapter
will go off.
CAUTION: Handle a disk module gently and use an ESD wristband.
Do not remove a faulty disk module until you have a replacement
module (with the same part number) or a filler module available.
Removing a disk module
NOTE: If a disk module has been bound into a LUN, do not move it to another slot
unless you do not care about the data on the LUN. Each module has LUN
identifying information written when it is bound. Moving it to another slot can
make information on the original LUN inaccessible.
Generally, you should not remove a disk module unless it is faulty. Refer to
“Interpreting front panel LEDs” on page 41 and “Monitoring K2 Level 2 RAID status
using NetCentral” on page 39 .
NOTE: If you wish to remove an operational disk module, use the Grass Valley
Storage Utility to disable the disk before removing it.
To remove the disk module:
1. Confirm the location of the faulty disk module by checking its Fault LED. Also
check NetCentral messages. NetCentral messages may report disk faults by disk
!