IDNDS Back to Index page
 
Prolog 
Control Block Contents 
   IDNDS DSECT
Storage Layout 
Cross Reference (Contains links to field and bit definitions)
Programming Interface Information:
This information is NOT intended to be
used as Programming Interfaces of z/VM.

 
  IDNDS Control Block Content Top of page
  




 IDNDS DSECT
Top of page


Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      IDNDS          NVMe Identify Namespace Data Structure
0000    0 Signed       8 IDNSZE         Namespace Size
0008    8 Signed       8 IDNCAP         Namespace Capacity
0010   16 Signed       8 IDNUSE         Namespace Utilization
0018   24 Bitstring    1 IDNSFEAT       Namespace Features B'rrrr----'
                                        Reserved
          00000008       IDNSFINR       B'00001000' NGUID/EUI64 not
                                        reused
          00000004       IDNSFDUE       B'00000100' Deallocated/Unwritten
                                        Block Error
          00000002       IDNSFAWD       B'00000010' Atomic Write fields
                                        defined
          00000001       IDNSFTHP       B'00000001' This Provisioning
0019   25 Address      1 IDNNLBAF       Number of LBA Formats
001A   26 Address      1 IDNFLBAS       Formatted LBA Size B'rrr-----'
                                        Reserved
          00000010       IDNFLBAM       B'00010000' Metadata at end of
                                        data
          0000000F       IDNFLBAN       B'00001111' LBA format number
001B   27 Bitstring    1 IDNMC          Metadata Capabilities B'rrrrrr--'
                                        Reserved
          00000002       IDNMCSB        B'00000010' Metadata transfer via
                                        Metsdata ptr
          00000001       IDNMCXL        B'00000001' Metadata transfer via
                                        extended LBA
001C   28 Bitstring    1 IDNDPC         End-to-end Data Protection
                                        Capabilities B'rrr-----' Reserved
          00000010       IDNDPCPL       B'00010000' Prot info last eight
                                        metadata bytes
          00000008       IDNDPCPF       B'00001000' Prot info first eight
                                        metadata bytes
          00000004       IDNDPCP3       B'00000100' Protection
                                        Information Type 3
          00000002       IDNDPCP2       B'00000010' Protection
                                        Information Type 2
          00000001       IDNDPCP1       B'00000001' Protection
                                        Information Type 1
001D   29 Bitstring    1 IDNDPS         End-to-end Data Protection
                                        Settings B'rrrr----' Reserved
          00000008       IDNDPSFL       B'00001000' Prot info transferred
                                        first/last
          00000007       IDNDPSTY       B'00000111' Protection
                                        information type
          00000000       IDNDPSNE       B'00000000' Protection
                                        information not enabled
          00000001       IDNDPST1       B'00000001' Protection
                                        information Type 1
          00000002       IDNDPST2       B'00000010' Protection
                                        information Type 2
          00000003       IDNDPST3       B'00000011' Protection
                                        information Type 3
001E   30 Bitstring    1 IDNMIC         Namespace Multi-path I/O and
                                        Sharing Caps B'rrrrrrr-' Reserved
          00000001       IDNMICSH       B'00000001' Namespace shareable
001F   31 Bitstring    1 IDNRESC        Namespace Reservation
                                        Capabilities
          1... ....      IDNRESIE       B'10000000' IDNRESIE Ignore
                                        Existing Key 1.3
          .1.. ....      IDNRESXA       B'01000000' IDNRESXA Exclusive
                                        Access - All Registrants
          .1.. ....      IDNRESWA       B'01000000' IDNRESWA Write
                                        Exclusive - All Registrants
          .1.. ....      IDNRESXO       B'01000000' IDNRESXO Exclusive
                                        Access - Registrants Only
          .1.. ....      IDNRESWO       B'01000000' IDNRESWO Write
                                        Exclusive - Registrants Only
          .1.. ....      IDNRESXR       B'01000000' IDNRESXR Exclusive
                                        Access Registration
          .1.. ....      IDNRESWR       B'01000000' IDNRESWR Write
                                        Exclusive Reservation
          .1.. ....      IDNRESPP       B'01000000' IDNRESPP Persist
                                        Through Power Loss
0020   32 Bitstring    1 IDNFPI         Format Progress Indicator
          1... ....      IDNFPIEN       B'10000000' IDNFPIEN Format
                                        Progress Indicator supported
          .111 1111      IDNFPCTG       B'01111111' IDNFPCTG Format
                                        Percentage remaining
0021   33 Address      1 IDNDLFTR       Deallocate Logical Block Feature
                                        B'rrr-----' Reserved
          00000010       IDNDLFGD       B'00010000' Guard field set to
                                        CRC
          00000008       IDNDLFWZ       B'00001000' Write Zero Deallocate
                                        bit supported
          00000007       IDNDLFVL       B'00000111' Values read from
                                        deallocated block
          00000000       IDNDLFVN       B'00000000' Not reported
          00000001       IDNDLFV0       B'00000001' All bytes set to
                                        X'00'
          00000002       IDNDLFVF       B'00000010' All Bytes set to
                                        x'FF'
0022   34 Address      2 IDNAWUN        Atomic Write Unit Normal
0024   36 Address      2 IDNAWUPF       Atomic Write Unit Power Fail
0026   38 Address      2 IDNACWU        Atomic Write Compare and Write
                                        Unit
0028   40 Address      2 IDNABSN        Atomic Boundary Size Normal
002A   42 Address      2 IDNABO         Atomic Boundary Offset
002C   44 Address      2 IDNABSPF       Atomic Write Boundary Size Power
                                        Fail
002E   46 Address      2 IDNOIOB        Optimal I/O Boundary
0030   48 Bitstring   16 IDNVMCAP       NVM Capacity
0040   64 Bitstring   40 *              Reserved
0068  104 Bitstring   16 IDNGUID        Globally Unique Identifier
0078  120 Bitstring    8 IDNEUI64       IEEE Extended Unique Identifier
0080  128 Bitstring    4 IDNLBAF0 (0)   LBA Format 0 Support
0080  128 Address      2 IDNLBAMS       Metadata Size
0082  130 Address      1 IDNLBADS       Data Size (power of 2)
0083  131 Bitstring    1 IDNLBAB0       Byte 0 B'rrrrrr--' Reserved
          00000003       IDNLBARP       B'00000011' Relative Performance
          00000000       IDNLBAP3       B'00000000' Best
          00000001       IDNLBAP2       B'00000001' Better
          00000002       IDNLBAP1       B'00000010' Good
          00000003       IDNLBAPD       B'00000011' Degraded
0084  132 Bitstring    4 * (15)         LBA Format 1-15 Support
00C0  192 Bitstring  192 *              Reserved
0180  384 Bitstring 3712 *              Vendor Specific
 
 
  IDNDS Storage Layout Top of page
  
          
*** IDNDS - NVMe Identify Namespace Data Structure
*
*     +-------------------------------------------------------+
*   0 |                        IDNSZE                         |
*     +-------------------------------------------------------+
*   8 |                        IDNCAP                         |
*     +-------------------------------------------------------+
*  10 |                        IDNUSE                         |
*     +------+------+------+------+------+------+------+------+
*  18 |:SFEAT|:NLBAF|:FLBAS|IDNMC |IDNDPC|IDNDPS|IDNMIC|:RESC |
*     +------+------+------+------+------+------+------+------+
*  20 |IDNFPI|:DLFTR|  IDNAWUN    |  IDNAWUPF   |  IDNACWU    |
*     +------+------+-------------+-------------+-------------+
*  28 |  IDNABSN    |   IDNABO    |  IDNABSPF   |  IDNOIOB    |
*     +-------------+-------------+-------------+-------------+
*  30 |                       IDNVMCAP                        |
*     |                                                       |
*     +-------------------------------------------------------+
*  40 |///////////////////////////////////////////////////////|
*     =///////////////////////////////////////////////////////=
*     |///////////////////////////////////////////////////////|
*     +-------------------------------------------------------+
*  68 |                       IDNGUID                         |
*     |                                                       |
*     +-------------------------------------------------------+
*  78 |                       IDNEUI64                        |
*     +-------------+------+------+---------------------------+
*  80 |  IDNLBAMS   |:LBADS|:LBAB0|///////////////////////////|
*     +-------------+------+------+///////////////////////////|
*  88 |///////////////////////////////////////////////////////|
*     =///////////////////////////////////////////////////////=
*     |///////////////////////////////////////////////////////|
*     +-------------------------------------------------------+
*  C0 |///////////////////////////////////////////////////////|
*     =///////////////////////////////////////////////////////=
*     |///////////////////////////////////////////////////////|
*     +-------------------------------------------------------+
* 180 |///////////////////////////////////////////////////////|
*     =///////////////////////////////////////////////////////=
*     |///////////////////////////////////////////////////////|
*     +-------------------------------------------------------+
*1000
*
*** IDNDS - NVMe Identify Namespace Data Structure
 
 
  IDNDS Cross Reference Top of page
  
 
Symbol         Dspl Value
-------------- ---- -----
IDNABO         002A
IDNABSN        0028
IDNABSPF       002C
IDNACWU        0026
IDNAWUN        0022
IDNAWUPF       0024
IDNCAP         0008
IDNDLFGD       0021 00000010
IDNDLFTR       0021
IDNDLFVF       0021 00000002
IDNDLFVL       0021 00000007
IDNDLFVN       0021 00000000
IDNDLFV0       0021 00000001
IDNDLFWZ       0021 00000008
IDNDPC         001C
IDNDPCPF       001C 00000008
IDNDPCPL       001C 00000010
IDNDPCP1       001C 00000001
IDNDPCP2       001C 00000002
IDNDPCP3       001C 00000004
IDNDPS         001D
IDNDPSFL       001D 00000008
IDNDPSNE       001D 00000000
IDNDPSTY       001D 00000007
IDNDPST1       001D 00000001
IDNDPST2       001D 00000002
IDNDPST3       001D 00000003
IDNEUI64       0078
IDNFLBAM       001A 00000010
IDNFLBAN       001A 0000000F
IDNFLBAS       001A
IDNFPCTG       0020 7F
IDNFPI         0020
IDNFPIEN       0020 80
IDNGUID        0068
IDNLBAB0       0083
IDNLBADS       0082
IDNLBAF0       0080
IDNLBAMS       0080
IDNLBAPD       0083 00000003
IDNLBAP1       0083 00000002
IDNLBAP2       0083 00000001
IDNLBAP3       0083 00000000
IDNLBARP       0083 00000003
IDNMC          001B
IDNMCSB        001B 00000002
IDNMCXL        001B 00000001
IDNMIC         001E
IDNMICSH       001E 00000001
IDNNLBAF       0019
IDNOIOB        002E
IDNRESC        001F
IDNRESIE       001F 80
IDNRESPP       001F 40
IDNRESWA       001F 40
IDNRESWO       001F 40
IDNRESWR       001F 40
IDNRESXA       001F 40
IDNRESXO       001F 40
IDNRESXR       001F 40
IDNSFAWD       0018 00000002
IDNSFDUE       0018 00000004
IDNSFEAT       0018
IDNSFINR       0018 00000008
IDNSFTHP       0018 00000001
IDNSZE         0000
IDNUSE         0010
IDNVMCAP       0030
 
This information is based on z/VM 7.3.0 Last updated on 22 Jun 2022 at 15:53:12 EDT.
Copyright IBM Corporation, 1990, 2022