Ignite-UX Administration Guide for HP-UX 11i (B3921-90079, October 2013)

Figure 25 Consistency of I/O Addressing
Reboot
Installation with other hardware changes
C C C C C CC
Persistent DSF
LUN H/W Path
Lunpath H/W Path
Legacy DSF
Legacy H/W Path
Device ID
WWID
Installation with replacement of system and/or HBAs
with same model and config using the same devices
Installation with same system and config using
replacement devices
C C C CN N N
N N
N
N
N
N N N N N N
NN
N
* *
C N C C C
Recovery with same system and devices
N
R
C
R
C C C
Recovery with replacement of system and/or HBAs
with same model and config using the same devices
R
N C
R
C C C
Recovery with same system and config using
R
N
*
R
*
N N
Recovery with other hardware changes N
N N N N N N
System Event
Device Addressing Identification
Reinstallation on same system and devices.
replacement devices
Use the following key for the “Consistency of I/O Addressing” figure above.
C = Consistent — Device addressing id value is saved in HP-UX config content and the correlation
between these values and devices does not change as a result of the event.
N = New Value — Device addressing id value is newly created as a result of the event. The device
addressing id value for a device might or might not change as a result of the event.
R = Recovered — Ignite-UX will restore the association between device addressing id values and
devices when possible. The process used to match previous and current devices is handled by
Ignite-UX recovery matching methods. Matching might not be possible if the system configs differ.
* — Might be a consistent value for some I/O protocols such as parallel SCSI, and might be a
new value for some I/O protocols such as fibre channel.
Practical Considerations 79