HP UX System Management Software manual UNpath Per YH/W evi

Figure 25 Consistency of I/O addressing

Device Addressing Identification

System Event

L			L
	un		egac
UNpath				L
L
Per					y
						yH/W evi
				egac
		H/W
	tentH/W
sis								D	ce
			P	P			D	P
	SF ath				ath		SFath
	D

WWI D D

Reboot	C	C	C	C	C	C	C
Reinstallation on same system and devices.	N	N	C	N	C	C	C
Installation with replacement of system and/or HBAs	N N C N C C C
with same model and config using the same devices
Installation with same system and config using	N N *			N * N N
replacement devices
Installation with other hardware changes	N	N	N	N	N	N	N
Recovery with same system and devices	R	N	C	R	C	C	C
Recovery with replacement of system and/or HBAs	R	N C		R	C	C C
with same model and config using the same devices
Recovery with same system and config using	R	N *		R	* N N
replacement devices
Recovery with other hardware changes	N	N	N	N N		N N

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