Reason why redundant disks appear in an AIX application server on an IP SAN network

The AIX application server is connected to the Ethernet switch through a network cable. The switch is connected to two iSCSI host ports on the same controller of the storage device through two network cables. When a LUN is mapped to the AIX application server, the AIX application server detects redundant disks.

To enhance the data transfer reliability, an application server and a storage array are usually connected over multiple paths. If the multipathing software is unavailable, those multiple paths translate into multiple redundant disks, which confuse the actual number of disks.

In the Ethernet networking, the AIX application server does not support the multipathing software. Therefore, redundant disks are detected on the AIX application server.

On a Fibre Channel network, AIX application servers support the multipathing software.

Scroll to top