wwn

Description

The wwn placeholder represents the World Wide Name (WWN) of a device. A WWN is a 64-bit address used to uniquely identify a device in a Fibre Channel network. A WWN is typically assigned to a device by the device manufacturer, although the WWN can be later changed by a network user.

Restrictions and Usage Notes

Oracle Secure Backup supports devices whose operating system-assigned logical names can vary at each operating system restart. Fibre Channel-attached tape drives and libraries connected to NAS devices fall into this category. You can refer to these devices by their WWNs, for example, nr.WWN[2:000:0090a5:0003f7].a, rather than their logical names, for example, nrst0a. Unlike the logical name, the WWN does not change when you restart.

Any substring of the attachment's raw device name that is the string $WWN is replaced with the value of wwn each time the device is opened. For example, a usable raw device name for a SAN-attached Network Appliance filer is nr.$WWN.a. This name specifies a no-rewind, best-compression device having the world-wide name you specify with the --wwn/-W option, for example, --wwn WWN[2:000:0090a5:0003f7].

Syntax

wwn::=

wwn

Semantics

wwn

Specifies a World Wide Name.