HP XP7 Storage - Manual (Page 128)

FREEZE function Expected messages Pairs split? Failure condition
Not activated
1
No IEA480E, IEA491E, or IEA494I messages
display. No 1. Failure of all channel interfaces
on the MCU
Not activated
1
(1) IEA480E message (SIM for blocked physical disk
or disk’s port) displays when the next I/O is issued
to any volume in the parity group. No Failure of one
physical disk in
a parity group 2. Failure of a
disk on the
MCU
(2) No IEA491E or IEA494I messages display.
Not activated
2
(1) IEA480E message (SIM for blocked LDEV)
displays when the next I/O is issued to any volume
in the parity group. No Failure of two
physical disks in
a parity group
(2) No IEA491E or IEA494I messages display.
Not activated (1) IEA480E message (SIM for blocked Cnt Ac-S Z
path) is reported when the next I/O to any device
in this MCU is issued. No 3. Failure of a link between the
MCU and RCU
(2) No IEA491E or IEA494I messages display.
Not activated (1) IEA480E (SIM for cache blocked) is reported
when the next I/O to any device in this MCU is
issued. No
3
One side of
MCU cache
blocked due to
failure 4. Failure of
NVS on the
MCU; failure
of MCU read
cache
(2) No IEA491E or IEA494I messages display.
Not activated No IEA480E, IEA491E, or IEA494I messages
display. No
3
One side of
MCU cache
blocked due to
maintenance
Not activated No IEA480E, IEA491E, or IEA494I messages
display. No
3
One side of
MCU cache
blocked by SET
CACHE OFF
Not activated No IEA480E, IEA491E, or IEA494I messages
display. The MCU returns CC=3 for all I/Os. No 5. 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 No Failure 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.
128 Pair operations using PPRC