Legacy and Agile Device Names

Integrity VM Version 4.0 supports the usage of both legacy and agile devices in guest configurations. Use of agile device names for configuring storage devices is highly recommended as it provides multipathing benefits.You can use the hpvmmodify -P guest -m rsrc command to change the existing legacy device to its agile device equivalent. The ioscan -m dsf command displays the mapping of the agile devices to legacy devices for the specific device special file dsf and vice versa. For example:

# ioscan -m dsf /dev/rdisk/disk216

Or:

# ioscan -m dsf /dev/rdsk/c12t0d0




	NOTE: The rmsf `-L` command should not be executed on an Integrity VM server until all guest devices names have been changed to agile device names.

The following commands are helpful for reconfiguring guests to use agile device names:

Table 3-1 Commands for Reconfiguring Guests to Agile Device Names

Command	Description
insf	By default, creates both persistent and legacy DSFs for new devices.
insf `-L`	Restores legacy DSFs and legacy configuration information.
rmsf `-L`	Aids in migration by removing all legacy DSFs and legacy configuration information.
ioscan `—m` dsf	Maps persistent DSFs to their equivalent legacy DSFs and vice versa.
ioscan `-N`	Prints persistent DSFs when used with the `-n` option to list DSFs.
io_redirect_dsf	Associates a new disk with an existing set of DSFs. This is used when replacing an internal disk or a disk in a JBOD.
hpvmmodify `-P` guest `—m` rsrc	Modifies backing devices for guest devices.

Legacy and Agile Device Names

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