DS8000 Transparent Cloud Tiering

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  • 1.  stand alone restore at disaster recovery

    Posted Mon April 17, 2023 09:26 AM

    Hello,

    I would like to ask you the best way at Diserster Recovery(DR).


    As my understanding, following must be required to recover using TCT.
    (1)Stand-Alone DFSMSdss(SADSS) to boot(IPL) and restore Full Voume Dump(FVD) image from HMC attached USB storage media (or ftp server).
    (2)FVD image of tiny z/OS to restore massive volumes. (not dumped by TCT, restored by SADSS)
    (3)other all FVD images dumped by TCT.


    COD(Customized Offerings Driver) seems to be good for (1) and (2), but our FVD image is much better for (2).
    And maybe as you know, Model9 is realizing it.
    https://docs.model9.io/user-and-administrator-guide/performing-stand-alone-restore-bare-metal-recovery


    So I tried:


    (1)Build SADSS to zFS, download them, and boot from USB media.

    // EXEC PGM=ADRDSSU
    //SYSPRINT DD SYSOUT=*
    //SADRYLIB DD DISP=SHR,DSN=SYS1.SADRYLIB
    //IMAGE    DD PATH='/u/wakita/DFSMSDSS.IMAGE',
    // PATHOPTS=(OWRONLY,OCREAT,OTRUNC),PATHMODE=(SIRWXU)
    //PREFIX   DD PATH='/u/wakita/DFSMSDSS.PREFIX',
    // PATHOPTS=(OWRONLY,OCREAT,OTRUNC),PATHMODE=(SIRWXU)
    //BOOTTEXT DD PATH='/u/wakita/DFSMSDSS.INS',
    // PATHOPTS=(OWRONLY,OCREAT,OTRUNC),PATHMODE=(SIRWXU)
    //SYSIN    DD *
      BUILDSA INDD(SADRYLIB) IPL(DVD) -
        OUTDD(IMAGE) PREFIXDD(PREFIX) BOOTTEXTDD(BOOTTEXT)

    --->okay. (but not documented at all...)


    (2)Dump full one volume to dataset, download it, and restore using above SADSS.
    RESTORE FROMDEV(DVD) TOADDR(uuuu) PATH('/pfx') FULL NOVERIFY

    --->failed...


    Would you give your comment?



    ------------------------------
    HIRONORI WAKITA
    ------------------------------


  • 2.  RE: stand alone restore at disaster recovery

    Posted Mon April 17, 2023 11:02 PM

    I referred COD FVD image.
    -segmented to multiple files (approx.120MB)
    -each files named as 3 charactor prefix+5 sequence number.
    -4 bytes block length added.
    (e.g. SY100001 in D9ESY1)
    added length 0x00000080 at address 0x00000000
    FVD data from address 0x00000004
    added length 0x0000076E at address 0x00000084
    FVD data from address 0x00000088
    added length 0x0000076E at address 0x000007F6
    FVD data from address 0x000007FA
    :

     ADDRESS   00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F   0123456789ABCDEF 
    ------------------------------------------------------------------------------
     00000000  00 00 00 80 00 00 00 01 01 01 00 80 10 80 80 02   ................ 
     00000010  00 01 00 00 00 00 00 03 00 00 00 0E 0D 0B 00 0F   ................ 
     00000020  FF FE 00 00 C4 F9 C5 E2 E8 F1 89 01 15 01 6F 10   ....D9ESY1i...?. 
     00000030  00 04 09 30 30 20 0F 00 21 06 62 00 00 38 20 0A   ................ 
     00000040  01 2E 01 00 07 70 00 05 07 70 00 0E 00 38 03 80   ................ 
     00000050  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................ 
     00000060  00 00 00 00 00 04 00 00 00 00 00 00 00 00 00 00   ................ 
     00000070  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................ 
     00000080  00 00 00 00 00 00 07 6E 00 00 00 02 04 01 07 6E   .......>.......> 
     00000090  10 80 40 00 00 01 00 00 C2 D4 C2 C2 17 C5 0D D8   .. .....BMBB.E.Q 
     000000A0  3A 89 00 00 FF FF FF FF FF FF FF FF FF FF FF FF   .i.............. 
     000000B0  FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF   ................ 
    :
     000007E0  FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF   ................ 
     000007F0  FF FF FF FF FF FF 00 00 07 6E 00 00 00 03 04 02   .........>...... 
     00000800  07 6E 10 80 40 00 00 01 00 00 C2 D4 C2 C2 17 C5   .>.. .....BMBB.E 
     00000810  15 38 3A 89 00 00 FF FF FF FF FF FF FF FF FF FF   ...i............ 
     00000820  FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF   ................ 
    :

    So I believe that COD FVD image have been generated by DFSMSdss and/or some tools...



    ------------------------------
    HIRONORI WAKITA
    ------------------------------

    Original Message


  • 3.  RE: stand alone restore at disaster recovery

    Posted Fri April 21, 2023 10:01 AM

    For instance, the most simplest and easiest way is dscli command that can restore CKD/FBA volumes directly from cloud instead of z/OS DFSMS.

    If so, SADSS and tiny z/OS are no longer required...



    ------------------------------
    HIRONORI WAKITA
    ------------------------------

    Original Message


  • 4.  RE: stand alone restore at disaster recovery

    Posted Mon April 24, 2023 02:03 PM

    Hi Hironori, 

    From a DFSMSdss perspective, you are correct that this is an undocumented and unsupported interface that is intended for COD use.  The stand-alone restore operation that failed on your dump image must not have been provided by COD or is itself in error.  If the image was provided by COD, My best recommendation would be to contact COD for more details.

    Ernesto E. Figueroa
    DFSMSdss Product Owner




    ------------------------------
    ERNESTO FIGUEROA
    ------------------------------

    Original Message