Specifications

Storage and Adapter Configuration
Item Description
Dell PowerVault with Dell PERC and LSI Logic
MegaRAID controllers
SIOS Technology Corp. has certified the Dell
PowerVault storage array for use in a 2-node
cluster with the Dell PERC 2/DC, Dell PERC
4/DC, and LSI Logic MegaRAID Elite 1600
storage controllers, as long as the following set
of configuration requirements are met. (Note
that the Dell PERC 3/DC is the OEM version of
the MegaRAID Elite 1600.) These requirements
are necessary because these host-based RAID
controllers do not provide support for SCSI
reservations and unique device IDs, which
LifeKeeper normally requires.
1. The Dell PowerVault storage should not
be mixed with any other types of shared
storage to be managed by LifeKeeper
within the same cluster.
2. Follow the instructions provided with your
hardware for configuring the Dell
PowerVault storage and the controllers
for use in a cluster. Specifically, this
includes getting into the controller
firmware setup screens simultaneously
on both systems, selecting the adapter
properties page, setting “Cluster Mode” to
“Enabled”, and setting the “Initiator ID” to
6 on one system and to 7 on the other.
You should then make sure that both
controllers can see the same LUNs, and
that the Linuxmegaraiddriver is properly
configured to be loaded.
3. Because this storage configuration does
not support SCSI reservations, you must
disable the use of SCSI reservations
within LifeKeeper. This is accomplished
by adding the option
“RESERVATIONS=none” to the
LifeKeeper defaults
file,/etc/default/LifeKeeper, on both
nodes in the cluster. You must manually
configure a unique ID for each LUN to be
managed by LifeKeeper, using
the/opt/LifeKeeper/bin/lkIDutility. The
assigned ID must be unique within the
cluster and should be sufficiently
constructed to avoid potential future
conflicts. ThelkIDutility will
automatically generate a unique ID for
you if desired. Refer to the lkID(8)man
page for more detailsabout the use of the
utility, the IDs that it generates, where
the ID is placed, and any possible
restrictions. Also, see the note regarding
the use of lkID with LVMinthe Known
Issues section for theLVM Recovery Kit.
4. Obtain and configure a STONITH device
or devices to provide I/O fencing. This is
required due to the lack of SCSI
reservation support in this configuration.
Note that for this configuration, you
should configure your STONITH devices
to do a system “poweroff” command
rather than a “reboot”. You must also
take care to avoid bringing a device
hierarchy in-service on both nodes
simultaneously via a manual operation
when LifeKeeper communications have
been disrupted for some reason.
SteelEye Protection Suite for Linux89