Host modes for host groups

The following table lists the host modes that are available for use on your storage system. Carefully review and determine which host modes you will need to use when configuring your system and observe the cautions concerning using certain host modes. Host modes and host mode options must be set on the port before the host is connected. If you change host modes or host mode options after the host is connected, the host (server) will not recognize it.

Host mode

When to select this mode

00 Standard

When registering Red Hat Linux server hosts or IRIX server hosts in the host group. When connected to NAS Platform (unified or external) version 12.5 or later, select 00 Standard for NAS Platform (User LU) ports and NAS Platform (System LU) ports.

01 (Deprecated) VMware

When registering VMware server hosts in the host group1

03 HP

When registering HP-UX server hosts in the host group

05 OpenVMS

When registering OpenVMS server hosts in the host group

07 Tru64

When registering Tru64 server hosts in the host group

09 Solaris

When registering Solaris server hosts in the host group

0A NetWare

When registering NetWare server hosts in the host group

0C (Deprecated) Windows

When registering Windows server hosts in the host group2

0F AIX

When registering AIX server hosts in the host group

21 VMware Extension

When registering VMware server hosts in the host group. If the virtual host on VMware recognizes LUs by the Raw Device Mapping (RDM) method, set the host mode related to OS of the virtual host.

Example: If a LUN/LDEV is formatted as VMFS (where virtual machines and their VMDK’s usually reside), it should be set with HMO 21. However, if a LUN/LDEV is formatted as a specific file system format (for example, NTFS) and has application requirements to be presented directly to a virtual machine as an RDM, it should be set to the HMO specific to that OS/filesystem (e.g., such as HMO 2C for Windows).

A common example of VM’s with this mix would be:

C: drive – OS VMDK on VMFS

D: drive – RDM for application data

In this example, 2 different Host Groups should be created for a single host with different HMO and LUN’s assigned.

2C Windows Extension

When registering Windows server hosts in the host group.

Notes:

  1. There are no functional differences between host mode 01 and 21. When you first connect a host, it is recommended that you set host mode 21.
  2. There are no functional differences between host mode 0C and 2C. When you first connect a host, it is recommended that you set host mode 2C.

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