![]() ![]() ABR will always create a COPY 1 and will create COPY 2 if you add the TAPExx DD names.įor example, 1004502, is the second incremental backup (cycle 02) in the forty fifth full backup cycle (gen 0045), and is the COPY1 dump (C1) of disk CICS01 (VCICS01). Vvvvvv is the volume serial of the disk volume you are dumping. It is possible to change the high level index to something other than FDRABR when you first install the product, by changing the entry in the FDR Global Option Table, but once you start taking backups, the index is fixed. Tape Naming StandardsįDRABR uses a fixed naming standard for its disk backups. The DSN names must be unique to meet operating system requirements, but they are overridden by ABR as specified below. TAPE22 DD DSN=FDR21,DISP=OLD,UNIT=REMOTE TAPE11 DD DSN=FDR11,DISP=OLD,UNIT=REMOTE The TAPE2 TAPE22 are also a duplexed pair, but will concurrently dump a different set of disks. These two tapes are duplexed copies of the same data. This, of course, assumes that these esoterics are defined in the IOCP and match real tape unit addresses. The TAPE1 tape is held locally, while the TAPE11 tape is going to a remote drive as specified in the UNIT parameters. You can do all this with the correct set of TAPE DD statements as shown below. You may also want to duplex tapes to create an offsite copy. If you are dumping by storagepool, and the pool contains a lot of volumes, you may want to write to more than one tape to speed the job up. This self stacking mechanism means that FDRABR is not a good virtual tape candidate. ABR will automatically stack those files onto one tape, you do not need to build complicated referback JCL to do this yourself. Dataset StackingĪBR creates a separate dataset for every disk dumped, unlike DFDSS which lumps all disks dumped in one jobstep into a single file. A restore from tape is almost as fast as a restore from disk. Its possible to backup to disk, but as the backup is in a propriety FDRABR format which cannot be read by anything except FDR products, there is probably not much point. This section assumes that all backups go to tape. ![]()
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