To host quorum disks
on HDS USP and NSC storage systems,
you must be aware of the system requirements for establishing quorum
disk for these storage systems.
Note: Oracle StorEdge systems do not support host
system quorum disks.
The system
uses a quorum disk to store important system configuration data and to break a tie if a SAN failure
occurs. The system automatically chooses three managed disks (MDisks) as quorum disk candidates.
Each disk is assigned an index number: either 0, 1, or 2. Although a system can be configured to use
up to three quorum disks, only one quorum disk is elected to resolve a tie-break situation. The
purpose of the other quorum disks is to provide redundancy if a quorum disk fails before the system
is partitioned.
Requirements
for HDS TagmaStore USP, HP XP10000/12000, and NSC55:
To host any of the three quorum disks on these HDS TagmaStore USP, HP XP10000/12000, or NSC55
storage systems, ensure that each of the following conditions is met:
- Firmware version Main 50-09-72 00/00 or later is running. Contact HDS or HP support for details
on installing and configuring the correct firmware version.
- System Option 562 is enabled. Contact HDS or HP support for details on
System Option 562.
- All system ports are configured in a single HDS or HP host group.
Requirements
for HDS TagmaStore USPv, USP-VM,
and HP XP20000/24000:
To host any of the three quorum disks on these HDS TagmaStore USPv, USP-VM, or HP XP20000/24000
systems, ensure that each of the following requirements is met:
After you verify these requirements for the appropriate storage system, complete the following
steps on the system command-line interface to set the quorum disks:
- Enter the chcontroller
command:
chcontroller -allowquorum yes controller_id or controller_name
where
controller_id or controller_name is the controller that corresponds to the
relevant HDS or HP storage system.
- Repeat step #svc_hdsuspnscquorumdisks_2s8fkt/quorumdiskstep1 for each controller
that is part of the relevant HDS or HP storage system.
- Enter the setquroum
command:
setquroum -quorum [0|1|2] mdisk_id or mdisk_name
where
mdisk_id or mdisk_name is the relevant MDisk on the HDS or HP system.
Attention: Failure to meet these conditions or
to follow these steps can result in data corruption.
The support website provides current information about quorum support:
https://datacentersupport.lenovo.com/