HP XP P9500 Storage - Manual (Page 96)

Table 39 P9500 response characteristics to failure conditions (continued)
FREEZE function Expected messages Continuous
Access
Synchronous Z
pairs
suspended? Failure condition
Not activated (1) The RCU reports IEA480 message (SIM for
cache blocked) to either the MCU or the host No One side of
RCU cache Failure of NVS
on the
processor (whichever issues the next I/O first). If blocked due to
failure RCU;Failure of
RCU read
cache
MCU receives the SIM, it passes the SIM to the
attached host processor. Therefore, IEA480 is
reported when the next I/O to any device in this
MCU issued.
(2) No IEA491 or IEA494 messages are
displayed.
Not activated No IEA480, IEA491, or IEA494 messages are
displayed. No One side of
RCU cache
blocked due to
maintenance
Not activated No IEA480, IEA491, or IEA494 messages are
displayed. No One side of
RCU cache
blocked by SET
CACHE OFF
Activated if the
FREEZE option is (1) No IEA480 (SIM of cache blocked) is
displayed. Yes Both sides of RCU cache
blocked due to failure
enabled for the
(2) One (or more) IEA494 messages showing
EXTENDED LONG BUSY are displayed.
affected LCU
pairs.
(3) One (or more) IEA491 and IEA494 messages
showing PAIR SUSPENDED are displayed.
(4) If CGROUP FREEZE and RUN are issued,
IEA494 messages showing PAIR SUSPENDED are
displayed when the MCU accepts CGROUP RUN.
These messages are from the Continuous Access
Synchronous Z pairs for which FREEZE option is
enabled, and from main volumes which did not
already report IEA491/IEA494 at (3).
Activated if the
FREEZE option is (1) IEA480 (SIM for Continuous Access
Synchronous Z path blocked) message is reported Yes Failure of all links between the
MCU and RCU
enabled for the when the next I/O to any device in this MCU is
issued.
affected LCU
pairs.
(2) One (or more) IEA494 messages showing
EXTENDED LONG BUSY are displayed.
(3) One (or more) IEA491 and IEA494 messages
showing PAIR SUSPENDED are displayed.
Not activated No IEA480, IEA491, or IEA494 messages are
displayed. No On the MCU Power failure
Activated if the
FREEZE option is (1) IEA480 (SIM of Continuous Access
Synchronous Z path blocked) message is reported Yes On the RCU
enabled for the when the next I/O to any device in this MCU is
issued.
96 Using PPRC commands for Continuous Access Synchronous Z