Advantech ASR-5300I Series, Руководство пользователя

Страница: 52 / 122

ASR-5300I Series Hardware User Manual 42
Users can refer to the ID tags on the host links to view the related logical volume
mapping and cable link routing paths. Through the cable links illustrated above, the
configuration can withstand failure of a single component, such as a RAID controller,
HBA, cable, or FC switch.
Each logical partition is redundantly mapped to multiple host channel IDs in an AAPP
(Active-Active-Passive-Passive) configuration. Logical volumes are managed either
by Controller A or Controller B. Passive IDs will only become functional when a single
controller fails in the system. The EonPath driver must be installed on the application
servers. The driver communicates with system firmware and performs load balancing
and automatic distribution of I/Os across preferred paths (active IDs on data paths).
TPGS (Target Port Group Service) is supported to ensure that I/Os are routed to the
preferred paths.
3.3.7 Switched Fabric Connection (Single-Controller)