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4.4 Disk roaming
Physical disks can be re-sequenced in the same system or move all physical
disks from system-1 to system-2. This is called disk roaming. Disk roaming
has some constraints as described in the followings:
1. Check the firmware of two systems first. It is better that both
systems have the same firmware version or newer.
2. All physical disks of related VG should be moved from system-1 to
system-2 together. The configuration of both VG and UDV will be
kept but LUN configuration will be cleared in order to avoid conflict
with system-2.
4.5 Support Microsoft MPIO and MC/S
MPIO
(Multi-Path Input/Output) and
MC/S
(Multiple Connections per Session)
use multiple physical paths to create logical "paths" between the server and
the storage device. In this case, which one or more of these components fails,
causing the path to fail, multi-path logic uses an alternate path for I/O. So
applications can still access their data.
Microsoft iSCSI initiator supports multi-path. Please follow the procedures to
use MPIO feature.
1. A host with dual LAN ports connects cables to controller.
2. Create a VG/UDV and attach this UDV to the host.
3. When installing
“Microsoft iSCSI initiator”
, please install MPIO
Caution
UDV Extension cannot be executed during rebuild or migration.
