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# Host and host group flags

Storage hosts are systems that use storage system LUN resources.

Table 1. Host and host group flags
Attribute | Description
--- | ---
Volume Set Addressing** | This attribute enables the volume set addressing mode. When using volume set addressing, you must specify a four-digit address in the following range: (0)000-(0)007, (0)010-(0)017, up to a maximum of (0)FF0-(0)FF7 Where the first digit must always be set to 0 (storage system does not support the upper range of volume set addressing), the second digit is the VBus number, the third digit is the target, and the fourth digit is the LUN.
Avoid Reset Broadcast* | This attribute enables a SCSI bus reset to only occur to the port that received the reset (not broadcast to all channels).
Environs Set* | This attribute enables the environmental error reporting by the storage system to the host on the specific port.
Disable Q Reset on UA | When enabled, a Unit Attention (UA) that is propagated from another director does not flush the queue for this volume on this director. Used for hosts that do not expect the queue to be flushed on a 0629 sense (only on a hard reset).
SCSI 3* | Alters the inquiry data (when returned by any volume on the port) to report that the storage system supports the SCSI-3 protocol. When disabled, the SCSI 2 protocol is supported.
SCSI Support1 (OS2007)* | This attribute provides a stricter compliance with SCSI standards for managing volume identifiers, multiport targets, unit attention reports, and the absence of a volume at LUN 0. To enable the SCSI Support1 attribute, you must also enable the SPC2 Protocol Version attribute.
SPC2 Protocol Version* | This flag should be enabled (default) in a Windows 2003 environment running Microsoft HCT test version 12.1. When setting this flag, the port must be offline.
Open VMS*,** | This attribute enables an Open VMS fibre connection.

* To enable or disable this flag when it is already overridden, that is, the Override option is already selected, you must:

Clear the Override option and click OK to close the dialog.

Open the dialog again, select Override, and then the desired state (Enable or Disable).

Click OK.

If the Volume Set Addressing flag is overridden and enabled, the Open VMS flag must be disabled. However, if you do not select the Open VMS override option, Solutions Enabler overrides and disables it.

If the Open VMS flag is overridden and enabled, the Volume Set Addressing flag must be disabled. However, if you do not select the Volume Set Addressing override option, Solutions Enabler automatically overrides and disables it.