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Hex Dec Type/Val Lng Label (dup) Comments
---- ---- --------- ---- -------------- --------
0000 0 Structure CUIBK CONTROL UNIT INFORMATION BLOCK
0000 0 Address 4 CUINXTCU NEXT CUIBK IN CHAIN
0004 4 Address 4 CUIRDEVS POINTER TO LIST OF RDEVS
ASSOCIATED WITH THIS CONTROL UNIT
0008 8 Dbl-Word 8 * (0)
0008 8 Bitstring 48 CUIAQLCK Spin Lock for AEBK queue(CUIAEBK)
0038 56 Address 4 CUIAEBK POINTER TO LIST OF AEBKS
ASSOCIATED WITH THIS CONTROL UNIT
003C 60 Signed 4 CUIDEDCT NUMBER OF DEVICES ATTACHED TO
THIS CONTROL UNIT WHICH ARE
DEDICATED TO THE GUEST (OR WHICH
HE HAS LINKED AS A FULL-PACK
MINI) NOTES : THIS FIELD IS
SERIALIZED BY MEANS COMPARE AND
SWAP LOGIC. ALL REFERENCES TO
FIELD MUST BE MADE USING COMPARE
AND SWAP
0040 64 Bitstring 1 CUIPOLL FLAG FOR POLLING
1... .... CUIPOLL1 X'80' CUIPOLL1 USED TO INDICATE
WHETHER ALL AEBKS ON THI CUIBK
HAVE BEEN POLLED THIS TIME (USED
AS A TOGGLE IN CONJUNCTION WITH
CUIPOLL2)
.1.. .... CUIPOLL2 X'40' CUIPOLL2 USED TO INDICATE
WHETHER ALL AEBKS ON THI CUIBK
HAVE BEEN POLLED THIS TIME (USED
AS A TOGGLE IN CONJUNCTION WITH
CUIPOLL1)
0041 65 Bitstring 1 CUISFLG SPECIAL CONDITIONS FLAG
1... .... CUISWPAV X'80' CUISWPAV Hyperswap PAV
radix tree swap is done
.1.. .... CUIQSMUC X'40' CUIQSMUC Indicates that
devices on this CU are quiesced
for Summary UC recovery
processing.
..1. .... CUINPPSN X'20' CUINPPSN Indicates that
devices on this CU should enable
PPRC Suspend Summary
Notifications
.... ...1 CUIEDEV X'01' CUIEDEV CUIBK is associated
with EDEVICE
0042 66 Bitstring 14 CUISSID Subsystem ID for this control
unit
0050 80 Dbl-Word 8 * (0)
0050 80 Bitstring 48 CUIDTLCK Spin lock for subsys status data
fields
(CUISSID,CUICFWID,CUISFLGS,CUIFCX
PE,CUIFCPTR,
CUISYSAL,CUIMDSHR,CUIMDENT,CUIPGS
HR,CUIPGENT)
0080 128 Signed 2 CUICFWID CURRENT CACHE FASTWRITE ID FOR
THIS SUBSYSTEM
0082 130 Signed 2 CUIDVSC DEVICE NUMBER OF THE DEVICE WHICH
MOST RECENTLY CAUSED THE
INVOCATION OF STATE-CHANGE-TYPE
PROCESSING
0084 132 Bitstring 1 CUISCAS SUBSYSTEM CACHING STATUS FLAG
1... .... CUISSCA X'80' CUISSCA CACHING IS ACTIVE
.1.. .... CUISCTM X'40' CUISCTM CACHING TERMINATED
..1. .... CUISSCD X'20' CUISSCD CACHING IS
DEACTIVATED
...1 .... CUISCPOF X'10' CUISCPOF PENDING OFF FAILED
0085 133 Bitstring 1 CUISDCCO STORAGE DIRECTOR CACHING
CONDITIONS FLAG
1... .... CUISSDM X'80' CUISSDM SUBSYSTEM STORAGE
DISABLED FOR MAINTENANCE
.1.. .... CUIIMLNA X'40' CUIIMLNA IML DEVICE NOT
AVAILABLE
..1. .... CUICFWDA X'20' CUICFWDA CACHE FAST WRITE
DATA ACTIVATED
...1 .... CUICFWDD X'10' CUICFWDD CACHE FAST WRITE
DATA DEACTIVATED
0086 134 Bitstring 1 CUINVCAS NON-VOLATILE CACHE STATUS FLAG
1... .... CUINVCA X'80' CUINVCA NON-VOLATILE CACHE
IS ACTIVATED
.1.. .... CUINVTM X'40' CUINVTM NON-VOLATILE CACHE
AVAILABILITY TERMINATED
..1. .... CUINVCD X'20' CUINVCD NON-VOLATILE CACHE
DEACTIVATED
...1 .... CUINVPOF X'10' CUINVPOF NON-VOLATILE CACHE
PENDING OFF
0087 135 Bitstring 1 CUINVSCO NON-VOLATILE STORAGE CONDITIONS
FLAG
1... .... CUINVDM X'80' CUINVDM NON-VOLATILE
STORAGE DISABLED FOR MAINTENA
.1.. .... CUINVPE X'40' CUINVPE NON-VOLATILE
STORAGE PENDING BECAUSE OF ER
..1. .... CUINVOP X'20' CUINVOP NON-VOLATILE
STORAGE OPERATIONAL *** CONTROL
UNIT ID & MODEL NUMBER
0088 136 Bitstring 2 CUICUID CONTROL UNIT ID IN PACKED DECIMAL
008A 138 Bitstring 1 CUICUMN CONTROL UNIT MODEL NUMBER
THIS BYTE IS USED AS A PLACE HOLDER. WHEN A DEVICE GOES FRO
BEING A SECONDARY TO SIMPLEX, THIS INFORMATION WILL BE USED
IN THE SETTING OF RDEVDP AND RDEVFEAT INFORMATION.
008B 139 Bitstring 1 CUIFEAT FEATURE INFORMATION FOR DUPLEX
PAIRS
1... .... CUIGRPD X'80' CUIGRPD PATHS ARE CURRENTLY
GROUPED
.... .1.. CUIRSRL X'04' CUIRSRL RESERVE/RELEASE IS
SUPPORTED
.... ..1. CUIMPM X'02' CUIMPM MULTIPATH MODE DP
WAS ESTABLISHED
.... ...1 CUISPM X'01' CUISPM MULITPATH MODE DP AS
ESTABLISHED
008C 140 Signed 4 CUILSBK Pointer to library statistics
block
0090 144 Signed 4 CUILSLN Length of library statistics
block
0094 148 Signed 2 CUILIMGR (0) Status Bits
0094 148 Bitstring 2 CUIOPRS Referenced by HCPTAM
00008000 CUIAUTO X'8000' CUIAUTO Referenced by
HCPTAM
00004000 CUIPAUS X'4000' CUIPAUS Referenced by
HCPTAM
00002000 CUIMANM X'2000' CUIMANM Referenced by
HCPTAM
00001000 CUIDGOP X'1000' CUIDGOP Referenced by
HCPTAM
00000800 CUISFTY X'0800' CUISFTY Referenced by
HCPTAM
00000400 CUIVSNO X'0400' CUIVSNO Vision System
Non-Operational
00000200 CUIOFFL X'0200' CUIOFFL Referenced by
HCPTAM
00000100 CUIINTR X'0100' CUIINTR Intervention
Required
00000080 CUILMC1 X'0080' CUILMC1 Library Manager
Check 1 Condition
00000040 CUIASCF X'0040' CUIASCF All Storage Cells
Full
00000020 CUIOOCV X'0020' CUIOOCV Out of Cleaner
Volumes
00000010 CUIDWDS X'0010' CUIDWDS Dual Write
Disabled
00000008 CUIENVA X'0008' CUIENVA Environmental
Alert
00000004 CUIIRFM X'0004' CUIIRFM Insufficient
Resources for Mounts
00000002 CUILMSW X'0002' CUILMSW Library Manager
Switchover In Progress
00000001 CUIVOES X'0001' CUIVOES VTS Out of Empty
Stacked Volumes
0096 150 Signed 2 CUIPMIH Primary MIH time-out value
0098 152 Address 4 CUISUCIO Summary UC recovery IORBK address
009C 156 Bitstring 1 CUILEVEL FORMAT OF SENSE SUBSYSTEM STATUS
1... .... CUISCNVS X'80' CUISCNVS FORMAT 0 OF SENSE
SUBSYSTEM STATUS
.1.. .... CUIDCNVS X'40' CUIDCNVS FORMAT 1 OF SENSE
SUBSYSTEM STATUS
..1. .... CUIMTSNS X'20' CUIMTSNS Format 2 of sense
subsystem status
009D 157 Bitstring 1 CUISSFG Subsystem Flag
1... .... CUISNSS X'80' CUISNSS Control unit
supports Sense Subsystem Status
CCW
009E 158 Bitstring 1 CUIGLBST SUBSYSTEM STATUS(CACHE&DASD)
fastwrite
1... .... CUISFWRE X'80' CUISFWRE FAST WRITE (CACHE
AND DASD) RESUMED
.1.. .... CUISFWSU X'40' CUISFWSU FAST WRITE (CACHE
AND DASD) SUSPENDED
009F 159 Bitstring 1 CUILSACP LSA Capacity operating level
00000000 CUILSAHA X'00' CUILSAHA Home Area
subsystem
00000001 CUILSANM X'01' CUILSANM Normal: LSA
subsystem is not capacity
strained
00000003 CUILSAST X'03' CUILSAST Stressed: LSA
subsystem is running beyond
recommended capacity
00000005 CUILSACR X'05' CUILSACR Critical: LSA
subsystem is almost out of space
00000007 CUILSAEM X'07' CUILSAEM Emergency: LSA
subsystem is totally full
00A0 160 Signed 2 CUISMIH Secondary MIH time-out value
00A2 162 Bitstring 2 CUIEOPR Library Extended Operational
State
00008000 CUICODS X'8000' CUICODS Copy Operations
Disabled
00004000 CUIVOPD X'4000' CUIVOPD VTS Operations
Degraded
00002000 CUIIMCC X'2000' CUIIMCC Immed Mode Copy
Completion's Deferred
00001000 CUISERP X'1000' CUISERP Service
Preparation
00A4 164 Address 4 CUITOKND Pointer to CDT structure (Token
NED)
00A8 168 Address 4 CUIGRSBK Pointer to list of guest response
summaries
00AC 172 Signed 4 CUISUCNT Summary UC recovery counter
00B0 176 Dbl-Word 8 * (0) Doubleword aligned
00B0 176 Bitstring 24 CUICDTLK Deferlock for CDT structure
pointed to by CUITOKND
00C8 200 Address 4 CUICUIRQ Pointer to first CUIR message
task
00CC 204 Address 4 CUICUILT Pointer to last CUIR message task
00D0 208 Dbl-Word 8 * (0) Doubleword aligned
00D0 208 Bitstring 48 CUIGQLCK Spin lock for guest response...
summaries
0100 256 Bitstring 4 CUICUIFG Flaf for CUIR message task
0104 260 Bitstring 14 CUITTID Tape token NED id
0112 274 Bitstring 14 CUITLID Tape library NED id
0120 288 Address 4 CUIARSV Pointer to Diagnose X'254' pseudo
VDEV if it exists. Serialized by
ARSLOCKW in the HCPIOD25 data
area.
0124 292 Bitstring 1 CUIFLAGS Miscellaneous CUI flags
1... .... CUISHARK X'80' CUISHARK CU is a SHARK CU
.1.. .... CUIFICON X'40' CUIFICON CU CHPIDs are all
FICON
..1. .... CUINUMVL X'20' CUINUMVL CU Number in
CUINUM is valid
...1 .... CUICPALW X'10' CUICPALW CP determined the
allowed PAV setting
.... 1... CUIHPALS X'08' CUIHPALS HyperPAV Aliases
are on this CU
.... .1.. CUISYSCF X'04' CUISYSCF This CUIBK was
built during system config file
processing and still needs to be
initialized
.... ..1. CUIIPLDV X'02' CUIIPLDV This CUIBK was
built during system init when the
IPL or PARM dev being init'ed
.... ...1 CUISETCH X'01' CUISETCH IDT has already
done Set Sys Char CCW
0125 293 Bitstring 1 CUIMCLIC Supported by microcode and LIC
feature code installed
1... .... CUISKFV2 X'80' CUISKFV2 Shark FlashCopy
Version 2
.1.. .... CUISKFVL X'40' CUISKFVL Shark Full Volume
..1. .... CUISKTAR X'20' CUISKTAR Shark PPRC Target
...1 .... CUISKFSE X'10' CUISKFSE Shark Track Space
Efficient FlashCopy
The CUISUMUC byte serializes summary uc recovery such that
the recovery action for all of the devices on the control
unit only occurs once for each unique failover condition.
Multiple summary unit checks could occur for one failover
condition if recovery does not finish within the CU's MIH
window. We do not want to do recovery multiple times.
0126 294 Bitstring 1 CUISUMUC Summary UC recovery in progress
flag
The CUIPVOPR byte indicates the PAV mode that this control
unit is currently operating in (No PAV, Basic PAV, or
HyperPAV).
NOTES : The PAV operating mode might be undeterminable
for a CU that does not have HyperPAV capabilities.
For example, a 2105 CU with Basic PAV capabilities
with no PAV Alias devices defined cannot be
distinguished from a 2105 CU with NO PAV
capabilities.
0127 295 Bitstring 1 CUIPVOPR CU PAV Operating Status Flag
00000001 CUINPVOP X'01' CUINPVOP CU is operating in
No PAV mode
00000002 CUIPAVOP X'02' CUIPAVOP CU is operating in
Basic PAV mode
00000003 CUIHYPOP X'03' CUIHYPOP CU is operating in
HyperPAV mode
000000FF CUIUNDET X'FF' CUIUNDET CU is either
running in Basic PAV mode with no
aliases currently defined or it
is running in No PAV mode (this
setting is only for CU's that
don't have HyperPAV capabilities)
The CUIPVALW byte indicates the highest level of PAV
devices allowed for this control unit (No PAV, Basic PAV,
or HyperPAV) by CP irregardless of the hardware
capabilities of the control unit. CP will always allow
the CU to operate in the highest level of PAV mode
(HyperPAV) UNLESS the user has indicated what is allowed
for this control unit via the CU config file statement or
the SET CU command.
0128 296 Bitstring 1 CUIPVALW CU PAV Allowed Indicator
00000001 CUINPVAL X'01' CUINPVAL CU allowed to
operate in NOPAV mode
00000002 CUIPAVAL X'02' CUIPAVAL CU allowed to
operate in PAV mode
00000003 CUIHYPAL X'03' CUIHYPAL CU allowed to
operate in HyperPAV mode
The CUIHPVHW byte indicates the PAV capability that is
currently installed in the hardware for a control unit
that has the potential to use HyperPAV devices when
all the required microcode and LICs are installed.
0129 297 Bitstring 1 CUIHPVHW HyperPAV CU Current HW
Capabilities
00000000 CUINOTHW X'00' CUINOTHW CU not a HyperPAV
capable controller
00000001 CUINPVHW X'01' CUINPVHW HyperPAV CU with
NO PAV capabilites
00000002 CUIPAVHW X'02' CUIPAVHW HyperPAV CU with
Basic PAV capabilities
00000003 CUIHYPHW X'03' CUIHYPHW HyperPAV CU with
HyperPAV capabilities
012A 298 Bitstring 2 CUINUM CU Number
012C 300 Bitstring 1 CUILSS Logical Subsystem ID
012D 301 Bitstring 1 CUICSFLG Flags (serialized by CS)
1... .... CUIXRC X'80' CUIXRC CU is XRC-capable
012E 302 Bitstring 2 * Reserved for future IBM use
0130 304 Signed 4 CUIHPVQU Count of Hyperswap-quiesced
HyperPAV bases on this LSS
0134 308 Signed 4 CUIHPVQT Count of Hyperswap HPAV
Alias-purge tasks currently
outstanding
0138 312 Signed 4 CUIGALI Count of guest dedicated and
guest defined aliases (serialized
by CS)
013C 316 Signed 2 CUIHPVSC LSS-wide count of alias devs to
be brought online post-hyperswap
013E 318 Bitstring 1 CUIHPVSL Spin lock to protect CUIHPVSC
013F 319 Bitstring 1 * Reserved for future IBM use
0140 320 Address 4 CUIFCPTR Feature codes pointer
0144 324 Address 4 CUISUCPY Summary UC copy IORBK address
Serialized by CUISUMUC
0148 328 Bitstring 8 CUIFCXPE HPF features (bytes 40-47 of Read
Features Codes)
0150 336 Address 4 CUILBSDV RDEV address of the HyperPAV Base
device that was last chosen in
the "back end process" (HCPHPVFB)
when a HyperPAV Alias device
became idle and the HyperPAV
Alias Free queue was empty.
0154 340 Bitstring 1 CUIPPRC1 Peer-to-Peer Remote Copy
Functions support
0155 341 Bitstring 3 * RESERVED FOR FUTURE IBM USE
0158 344 Bitstring 8 * RESERVED FOR FUTURE IBM USE
0160 352 Bitstring 8 * RESERVED FOR FUTURE IBM USE
0168 360 Signed 2 CUIMDSHR Minimum relative share of system-
attached HyperPAV aliases to be
used for minidisk I/O when all
system- attached HyperPAV aliases
are currently in use by CP (set
with SET CU).
016A 362 Signed 2 CUIMDENT Minimum entitlement of system-
attached HyperPAV aliases to be
used for minidisk I/O when all
system- attached HyperPAV aliases
are currently in use by CP.
016C 364 Signed 2 CUIPGSHR Minimum relative share of system-
attached HyperPAV aliases to be
used for paging I/O when all
system- attached HyperPAV aliases
are currently in use by CP (set
with SET CU).
016E 366 Signed 2 CUIPGENT Minimum entitlement of system-
attached HyperPAV aliases to be
used for paging I/O when all
system- attached HyperPAV aliases
are currently in use by CP.
0170 368 Signed 4 CUISYSAL Current amount of system attached
HyperPAV aliases associated with
this control unit.
0174 372 Signed 4 CUIMDAL Current amount of system attached
HyperPAV aliases that are in use
for minidisk I/O on behalf of a
system attached HyperPAV Base
device. (Used in accumulating
CUIMDALC)
0178 376 Signed 4 CUIPGAL Current amount of system attached
HyperPAV aliases that are in use
for paging I/O on behalf of a
system attached HyperPAV Base
device. (Used in accumulating
CUIPGALC)
017C 380 Signed 4 CUIMDQB Current count of minidisk I/Os
queued on system attached
HyperPAV Base devices. (Used in
accumulating CUIMDQBC)
0180 384 Signed 4 CUIPGQB Current count of paging I/Os
queued on system attached
HyperPAV Base devices. (Used in
accumulating CUIPGQBC)
0184 388 Signed 4 CUIMDCT Cumulative count of times the
system attached HyperPAV alias
pool was empty and the alias
selection algorithm tried to find
a minidisk I/O to execute on the
next available alias. It may or
may not have succeeded in finding
a minidisk I/O to execute.
0188 392 Signed 4 CUIMDYES Cumulative count of times the
system attached HyperPAV alias
pool was empty and the alias
selection algorithm succeeded in
finding minidisk I/O to execute
on the next available alias.
018C 396 Signed 4 CUIPAGCT Cumulative count of times the
system attached HyperPAV alias
pool was empty and the alias
selection algorithm tried to find
a paging I/O to execute on the
next available alias. It may or
may not have succeeded in finding
a paging I/O to execute.
0190 400 Signed 4 CUIPAGYS Cumulative count of times the
system attached HyperPAV alias
pool was empty and the alias
selection algorithm succeeded in
finding paging I/O to execute on
the next available alias.
0194 404 Signed 4 CUIMDALL Cumulative count of times a
system- attached HyperPAV alias
executed minidisk I/O on behalf
of a HyperPAV base device.
0198 408 Signed 4 CUIPGALL Cumulative count of times a
system- attached HyperPAV alias
executed paging I/O on behalf of
a HyperPAV base device.
019C 412 Signed 4 CUIMDSVD Cumulative count of times
minidisk I/O was being executed
on a fewer number of
system-attached HyperPAV Aliases
than was entitled and there was
at least one minidisk I/O queued
on any of the HyperPAV Base
devices associated with this
control unit.
01A0 416 Signed 4 CUIPGSVD Cumulative count of times paging
I/O was being executed on a fewer
number of system-attached
HyperPAV Aliases than was
entitled and there was at least
one paging I/O queued on any of
the HyperPAV Base devices
associated with this control
unit.
01A4 420 Signed 4 * RESERVED FOR FUTURE IBM USE
01A8 424 Dbl-Word 8 CUIMDALC Cumulative count of system
attached HyperPAV aliases that
are in use for MDISK I/O at the
time when a system attached
HyperPAV Alias device is chosen
to execute I/O on behalf of a
system attached HyperPAV base dev
01B0 432 Dbl-Word 8 CUIPGALC Cumulative count of system
attached HyperPAV aliases that
are in use for paging I/O at the
time when a system attached
HyperPAV Alias device is chosen
to execute I/O on behalf of a
system attached HyperPAV base dev
01B8 440 Dbl-Word 8 CUIMDQBC Cumulative count of minidisk I/Os
queued on system-attached
HyperPAV base devices when a
system-attached HyperPAV Alias
device is chosen to execute I/O
on behalf of a system attached
HyperPAV base device.
01C0 448 Dbl-Word 8 CUIPGQBC Cumulative count of paging I/Os
queued on system-attached
HyperPAV base devices when a
system-attached HyperPAV Alias
device is chosen to execute I/O
on behalf of a system attached
HyperPAV base device.
01C8 456 Dbl-Word 8 CUIMDAL2 CUIMDALC but sum of squares
01D0 464 Dbl-Word 8 CUIPGAL2 CUIPGALC but sum of squares
01D8 472 Dbl-Word 8 CUIMDQB2 CUIMDQBC but sum of squares
01E0 480 Dbl-Word 8 CUIPGQB2 CUIPGQB2 but sum of squares
01E8 488 Bitstring 8 * RESERVED FOR FUTURE IBM USE
01F0 496 Bitstring 8 * RESERVED FOR FUTURE IBM USE
01F8 504 Bitstring 8 * RESERVED FOR FUTURE IBM USE
0200 512 Dbl-Word 8 CUIBKEND (0) END OF CUIBK
00000040 CUISIZE (*-CUIBK+7)/8 SIZE OF CUIBK
0042 66 Bitstring 14 CUITSSID Tape Subsystem ID
0042 66 Bitstring 2 CUIDSSID DASD Subsystem ID
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