Quantum QXS G2 Series, Hardware Installation And Maintenance Manual

Page: 198 / 246

186 QXS G2 Hardware Installation and Maintenance Guide
Replacing a 2U Storage Chassis
The RAID chassis or expansion chassis replacement procedure replaces a damaged chassis CRU. The
procedure includes removing all CRU modules from a damaged chassis and installing them into a
replacement chassis.
IMPORTANT: The QXS-G2-312, QXS-G2-324, QXS-G2-412, and QXS-G2-424 systems using 2U12 or
2U24 chassis are described in Customer-Replaceable Units on page 146.
Whether your RAID chassis product is a 2U12 or 2U24 model, a fully functional replacement chassis
requires the successful removal and installation of the following components:
• All power and data cables
• All drive modules
• Two PSUs (both AC)
• Two controllers of the same model type
This procedure references the CRU component procedures described elsewhere in this chapter.
Before You Begin
CAUTION: Do not remove the chassis until you have received the replacement chassis.
Comply with all ESD precautions. Refer to ESD Precautions on page 165 for additional information.
1 Schedule down time that will allow for shutdown; sixty minutes of replacement work; and restart.
2 Verify the existence of a known/good backup of the system.
3 Record system settings for future use and label all cables.
4 Prepare a suitable static-protected work environment to accommodate chassis replacement.
Verifying Component Failure
The RAID chassis CRU includes the chassis metal housing, the module runner system, the integrated
Ops panel, and the assembled/installed midplane PCB that connects controller modules, drive
modules, and PSUs. See the empty chassis pictorials: 2U12– Front of 2U12 RAID or Expansion Chassis
on page 21 and 2U24– Front of 2U24 RAID or Expansion Chassis on page 22.
This CRU replaces an chassis that has been damaged, or whose midplane has been damaged. Often, a
damaged midplane will appear as though a RAID controller has failed. If you replace a controller
module and it does not remedy the fault, you may need to replace the chassis.
You can observe chassis health (front panel and rear panel) using management interfaces to verify
chassis/component failure or chassis/component operation. See also Using Management Interfaces
on page 190.
Preparing to Remove a Damaged 2U Chassis
Because you are removing and replacing an entire storage chassis, neither the hot-swap capability
that applies to replacing individual redundant CRUs in an operational storage chassis, nor the
hot-add of an expansion chassis to an operational storage system, apply to this procedure.