HP XP P9000 Continuous Access Synchronous for Mainframe Systems User Guide

FREEZE functionExpected messagesPairs suspended?Failure condition
Not activatedNo IEA480E, IEA491E, or IEA494I messages
display.
No
3
One side of
MCU cache
blocked by SET
CACHE OFF
Not activatedNo IEA480E, IEA491E, or IEA494I messages
display. The MCU returns CC=3 for all I/Os.
No5. Both sides of MCU cache
blocked due to failure
Not activated(1) The RCU reports IEA480E message (SIM for
blocked disk or disk’s port) to either the MCU or the
NoFailure of a disk
in a parity
group
6. Failure of a
disk on the
RCU host processor (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) 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
YesFailure 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
NoOne side of
RCU cache
7. Failure of
NVS on the
(whichever issues the next I/O first). If MCU receivesblocked 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 activatedNo IEA480, IEA491E, or IEA494I messages display.NoOne side of
RCU cache
blocked due to
maintenance
Not activatedNo IEA480, IEA491E, or IEA494I messages display.NoOne 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.
Yes8. 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).
122 Pair operations using PPRC