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Hex Dec Type/Val Lng Label (dup) Comments
---- ---- --------- ---- -------------- --------
0000 0 Structure VRDCBLOK VIRTUAL/REAL DEVICE CHARACTERISTICS BLOCK
0000 0 Bitstring 2 VRDCDVNO VIRTUAL DEVICE ADDRESS
0002 2 Bitstring 2 VRDCLEN VRDCBLOK LENGTH
0004 4 Bitstring 4 VRDCVDAT (0) VIRTUAL DEVICE DATA
0004 4 Bitstring 2 VRDCVCOD (0) VIRTUAL DEVICE CODE
0004 4 Bitstring 1 VRDCVCLA R*1 VIRTUAL DEVICE CLASS
0005 5 Bitstring 1 VRDCVTYP R*2 VIRTUAL DEVICE TYPE
0006 6 Bitstring 1 VRDCVSTA R*3 VIRTUAL DEVICE STATUS
0007 7 Bitstring 1 VRDCVFLA R*4 VIRTUAL DEVICE FLAG
0008 8 Bitstring 4 VRDCRCDT (0) REAL DEVICE DATA
0008 8 Bitstring 2 VRDCRCCO (0) REAL DEVICE CODE
0008 8 Bitstring 1 VRDCRCCL R*5 REAL DEVICE CLASS
0009 9 Bitstring 1 VRDCCRTY R*6 REAL DEVICE TYPE
000A 10 Bitstring 1 VRDCCRMD R*7 REAL DEVICE MODEL
000B 11 Bitstring 1 VRDCRLLE (0) REAL DEVICE LINE LENGTH
000B 11 Bitstring 1 VRDCCRFT R*8 REAL DEVICE FEATURE
000C 12 Bitstring 1 VRDCUNDV UNDERLYING DEVICE CODE FOR
DEVICES THAT EMULATE OTHER DEVICE
TYPES. VALID ONLY FOR CLASTAPE
DEVICES. ZERO FOR ALL OTHER
DEVICE CLASSES. VRDCUNDV Values
for CLASTAPE devices
.... .... VRDCTNAT X'00' Native non-emulation drive
.... ...1 VRDCT120 X'01' 3590 128-TRK drive (B1A or
B11) attached to 3590 A00/A50/A60
or 3592 J70 control unit,
emulating 3490E
.... ..1. VRDCTVTS X'02' 3490E virtual drive in a
3494 VTS tape library
.... ..11 VRDCT121 X'03' 3590 128-TRK drive (B1A or
B11) attached to 3591 control
unit, emulating 3490E
.... 1..1 VRDCT255 X'09' 3590 256-TRK drive (E1A or
E11) attached to 3590 A50/A60 or
3592 J70 control unit, emulating
3590 B1A or B11
.... 1.1. VRDCT254 X'0A' 3590 256-TRK drive (E1A or
E11) attached to 3590 A50/A60 or
3592 J70 control unit emulating
3490E
.... 1.11 VRDCT384 X'0B' 3590 384-TRK drive (H11 or
H1A) attached to 3590 A60 or 3592
J70 control unit, emulating
3590/B1x
.... 11.. VRDCT383 X'0C' 3590 384-TRK drive (H11 or
H1A) attached to 3590 A60 or 3592
J70 control unit, emulating a
3490E
...1 .... VRDCT512 X'10' 3592 512-TRK drive (J11 or
J1A) attached to 3590 A60 or 3592
J70 control unit, emulating
3590/B1x
...1 ...1 VRDCT511 X'11' 3592 512-TRK drive (J11 or
J1A) attached to 3590 A60 or 3592
J70 control unit, emulating a
3490E
...1 ..1. VRDCT896 X'12' 3592 896-TRK Model E05
drive attached to 3592 J70
control unit emulating 3590 B1x
...1 ..11 VRDCTENC X'13' 3592 896-TRK Model E05
drive emulating 3590 B1x, and
enabled for encryption
...1 .1.. VRDCTEN2 X'14' 3592 1152-TRK Model E06
drive emulating 3590 B1x, and
enabled for encryption
...1 .1.1 VRDCTEN3 X'15' 3592 2176-TRK Model E07
drive emulating 3590 B1x, and
enabled for encryption
1111 1111 VRDCTUNK X'FF' Unknown emulation drive
000D 13 Bitstring 1 VRDCRDAF Real Device Additional Features
1... .... VRDCFCDS X'80' VRDCFCDS Supports dataset
level FlashCopy
..1. .... VRDCFCFV X'20' VRDCFCFV Supports full
volume FlashCopy
.... .1.. VRDCXRCT X'04' VRDCXRCT XRC-Timestamping
enabled
.... ..1. VRDCEMRD X'02' VRDCEMRD Signifies RDEV
info is emulated Set for devices
where we provide emulated info
for a VDEV which has no true RDEV
(such as VDISK)
.... ...1 VRDCDA4F X'01' VRDCDA4F Supports DIAG A4
SCSI format
000E 14 Bitstring 2 VRDCRSVD Reserved: Must be 0s for z/VM
5.3.0 and earlier
CKD/ECKD dasd Read Device Characteristics (RDC) mapping
(most other devices are similarly mapped)
0010 16 Bitstring 64 VRDCSTRT (0) START OF THE RDC DATA BYTES
0010 16 Bitstring 2 VRDCCUTY CONTROL UNIT TYPE (RDCCUID)
0012 18 Bitstring 1 VRDCCUMD CONTROL UNIT MODEL (RDCCUMN)
0013 19 Bitstring 2 VRDCDVTY DEVICE TYPE (RDCDVID)
0015 21 Bitstring 1 VRDCDVMD DEVICE MODEL (RDCDVMN)
0016 22 Bitstring 4 VRDFEAT (0) DEVICE / STORAGE DIR. FEATURES
0016 22 Bitstring 3 VRDCDVFE DEVICE FACILITIES SUPPORTED
0019 25 Bitstring 1 VRDCSDFE SUBSYTEM FEATURES SUPPORTED
001A 26 Bitstring 1 VRDCDVCL DEVICE CLASS CODE
001B 27 Bitstring 1 VRDCDVCO DEVICE TYPE CODE
001C 28 Bitstring 28 VRDDEVF1 (0) DEVICE SPECIFIC FIELD 1
001C 28 Signed 2 VRDCPRIM NUMBER OF PRIMARY CYLINDERS NOTE:
For volumes with greater than
65,520 cylinders, VRDCPRIM will
contain X'FFFE'. See VRDCCYLS
below.
001E 30 Signed 2 VRDCTRKC TRACKS PER CYLINDER
0020 32 Bitstring 1 VRDCSECT NUMBER OF SECTORS
0021 33 Bitstring 3 VRDCTOTR TOTAL USABLE TRACK LINGTH
0024 36 Bitstring 2 VRDCHA LENGTH FOR HA AND R0
0026 38 Bitstring 1 VRDCMODE TRACK-CAPACITY CALCULATION MODE
0027 39 Bitstring 5 VRDMDFR (0) TRACK-CAP CALCULATION FACTORS
0027 39 Bitstring 1 VRDCMDFR TRACK CAPACITY CALCULATION CHGNED
0028 40 Signed 2 VRDCNKOV NON-KEYED RECORD OVERHEAD
002A 42 Signed 2 VRDCKOVH KEYED AREA OVERHEAD
002C 44 Signed 2 VRDCALTC ADDRESS OF FIRST ALTERNATE CYL
002E 46 Signed 2 VRDCALTR NUMBER OF ALTERNAME TRACKS
0030 48 Signed 2 VRDCDIG ADDRESS OF DIAGNOSTIC CYLINDER
0032 50 Signed 2 VRDCDIGN NUMBER OF DIAGNOSTIC TRACKS
0034 52 Signed 2 VRDCDVCY ADDRESS OF FIRST DEVICE CYLINDER
0036 54 Signed 2 VRDCDVTR NUMBER OF DEVICE SUPPORT TRACKS
0038 56 Bitstring 1 VRDCMDR MDR RECORD ID
0039 57 Bitstring 1 VRDCOBR OBR RECORD ID
003A 58 Bitstring 22 VRDDEVF2 (0) DEVICE SPECIFIC FIELD 2
003A 58 Bitstring 1 VRDCCUID CONTROL UNIT ID (RDCCUTYP)
003B 59 Bitstring 1 * (13) RESERVED
0048 72 Bitstring 1 VRDRCUC Real CU code
0049 73 Bitstring 3 * Reserved
004C 76 Signed 4 VRDCCYLS Number of primary cylinders
0050 80 Bitstring 11 VRDCPGID Real Path Group ID
005B 91 Bitstring 5 * Reserved
00000050 VRDCLNGC *-VRDCSTRT SIZE OF VRDC DATA FOR
CKD DEVICE
FBA dasd Read Device Characteristics (RDC) mapping
*** BYTES DEFINED FOR FBA DEVICE IN VRDCSTRT
0010 16 Bitstring 32 VRDCFBA (0) ALL 32 RDC BYTES
0010 16 Bitstring 1 VRDCOPER DEVICE OPERATION MODES
0011 17 Bitstring 1 VRDCFBAF FBA DEVICE FEATURES
0012 18 Bitstring 1 VRDCFBAC FBA DEVICE CLASS
0013 19 Bitstring 1 VRDCFBAT FBA DEVICE TYPE
0014 20 Bitstring 28 VRDFBAD1 (0) -
0014 20 Bitstring 2 VRDCRCSZ PHYSICAL RECORD SIZE
0016 22 Bitstring 4 VRDCBKCG BLOCKS PER CYCLICAL GROUP (TRACK)
001A 26 Bitstring 4 VRDCBKAP BLOCKS PER ACCESS POSITION
001E 30 Bitstring 4 VRDCBKMA BLOCKS UNDER MOVABLE ACCESS
0022 34 Bitstring 4 VRDCBKFA BLOCKS UNDER FIXED ACCESS
0026 38 Bitstring 2 VRDCBKAA BLOCKS IN ALTERNATE AREA
0028 40 Bitstring 2 VRDCBKCE BLOCKS IN CE AREA
002A 42 Bitstring 2 VRDCBFLG NUMBER OF BUFFERED LOG BYTES
002C 44 Bitstring 2 VRDCATMI MINIMUM ACCESS TIME
002E 46 Bitstring 2 VRDCATMA MAXIMUM ACCESS TIME
003A 58 Bitstring 22 VRDFBAD2 -
0050 80 Bitstring 16 * Reserved
Tape Read Device Characteristics (RDC) mapping
*** BYTES DEFINED FOR TAPE IN VRDDEVF1
001C 28 Bitstring 28 VRDTAPE1 TAPE SPECIFIC RESERVED
*** BYTES DEFINED FOR TAPE IN VRDDEVF2
003A 58 Bitstring 22 VRDTAPE2 TAPE SPECIFIC RESERVED
0050 80 Bitstring 16 * Reserved
00000060 VRDC00LN *-VRDCBLOK Version 0 Output
buffer length
0000000C VRDC00SZ (*-VRDCBLOK+7)/8 Version 0 length
in doublewords
Extended Input/Output Area
Notes : These fields are only valid if the value of
VRDCVERS (on output) is X'01' or greater.
0060 96 Bitstring 32 VRDCIOFL (0) Start of Extended Input/Output
0060 96 Bitstring 1 VRDCVERS Version of DIAG210 Output - This
field should be 0 on input.
0061 97 Bitstring 31 VRDCRSIO Reserved for future IBM use -
This field should be 0 on input.
Extended Output Area
Notes : These fields are only valid if the value of
VRDCVERS (on output) is X'01' or greater.
0080 128 Bitstring 2 VRDCRDEV Real Device Number
0082 130 Bitstring 1 VRDRRCC Condition codes if device can't
be reserved
1... .... VRDSUPRR X'80' VRDSUPRR Does not support
reserve/release
.1.. .... VRDMDWOV X'40' VRDMDWOV Minidisk without
the 'v' suffix
..1. .... VRDNFPDD X'20' VRDNFPDD Minidisk that is
not a fullpack
...1 .... VRDFPNSB X'10' VRDFPNSB Fullpack/dedicated
device without the SHARED bit on
0083 131 Bitstring 125 VRDCRSVE Reserved Space
00000100 VRDC01LN *-VRDCBLOK Version 1 Output
buffer length
00000020 VRDC01SZ (*-VRDCBLOK+7)/8 Version 1 length
in doublewords
00000100 VRDCLNGT (*-VRDCBLOK) Size of VRDCBLOK
00000020 VRDCSIZE (*-VRDCBLOK+7)/8 Doubleword size
of VRDCBLOK
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