HP XP7 Storage - Manual (Page 129)

FREEZE function Expected messages Pairs split? Failure condition
(2) No IEA491E or IEA494I messages display.
Activated if the
FREEZE option is (1) The RCU reports IEA480E message (SIM for LDEV
blocked) to either the MCU or the host processor Yes Failure of two
disks in a parity
group
enabled for the
affected MCU pairs. (whichever issues the next I/O first) when the next
I/O is issued to any volume in the parity group. If
MCU receives the SIM, it passes the SIM to the
attached host processor, and the IEA480E message
is reported when the next I/O to this MCU is issued
to any P-VOL paired with the volume in the parity
group.
(2) One or more IEA494I message showing
EXTENDED LONG BUSY display.
(3) One or more IEA491E or IEA494I message
showing PAIR SUSPENDED display.
Not activated (1) The RCU reports IEA480 message (SIM for cache
blocked) to either the MCU or the host processor No One side of
RCU cache 7. Failure of
NVS on the
(whichever issues the next I/O first). If MCU receives blocked due to
failure RCU; failure of
RCU read
cache
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
IEA491E or IEA494I messages display.
Not activated No IEA480, IEA491E, or IEA494I messages display. No One side of
RCU cache
blocked due to
maintenance
Not activated No IEA480, IEA491E, or IEA494I messages display. No One side of
RCU cache
blocked by SET
CACHE OFF
Activated if the
FREEZE option is (1) No IEA480 (SIM for blocked cache) displays.
(2) One or more IEA494I message showing
EXTENDED LONG BUSY display.
Yes 8. Both sides of RCU cache
blocked due to failure
enabled for the
affected MCU pairs.
(3) One (or more) IEA491E and IEA494I messages
showing PAIR SUSPENDED display.
(4) If CGROUP FREEZE and RUN are issued,
IEA494I messages showing PAIR SUSPENDED
display when the MCU accepts CGROUP RUN.
These messages are from the Cnt Ac-S Z pairs for
which FREEZE option is enabled, and from main
volumes that did not already report
IEA491E/IEA494I at (3).
Activated if the
FREEZE option is (1) IEA480 (SIM for Cnt Ac-S Z path blocked)
message is reported when the next I/O to any
device in this MCU is issued. Yes 9. Failure of all links between the
MCU and RCU
enabled for the
affected MCU pairs.
(2) One or more IEA494I message showing
EXTENDED LONG BUSY display. (3) One or more
IEA491E or IEA494I message showing PAIR
SUSPENDED display.
Not activated No IEA480, IEA491E, or IEA494I messages display. No a. On the MCU 10. Power
failure
Activated if the
FREEZE option is (1) IEA480 (SIM for blocked Cnt Ac-S Z path)
message is reported when the next I/O to any
device in this MCU is issued. Yes b. On the RCU
IEA494I and IEA491E console messages 129