iSeries Restoration

15 pts.
BRMS Backup
We have an i series server with two LPAR and has same tape drive .From one LPAR we are taking backup through BRMS tool  i am restoring the same data in another LPAR thrugh native tool.i am restoring it for past 1.5 yrs but suddenly now the restoration is getting failed telling catriage not mounted when i ask my friends they are telling me to move the tape to drive from storage mannualy .and i want to know what is use of the command ADDTAPCTG.. i am not having any idea of LPAR and tape drives used by them.. pls clear my doubt..

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Does your tape unit see both LPARS at the same time. On my System the IOP is shared and we have to use the HMC to move the tape unit between the LPARS. It can only be used by one LPAR at a time.

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  • Lovemyi
    When you have BRMS installed on the machine and you have a tape defined in one LPAR and you want to access that tape from the other LPAR, first you need to move the tape drive to the other LPAR and run the ADDMLMBRM command with the name of the tape drive and the media type to add it to BRMS on the other LPAR otherwise the exit point program rejects that tape due to not finding it within BRMS. Hope this helps. Lovemyi
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  • AdrianF
    Hi Guhan, A couple of issues here. First of all I find it rather dangerous to use the same tape and tapedrive in a BRMS and a non-BRMS environment at the same time. It means that BRMS managed tapes can be overwritten with things that are from another system without BRMS. VERY VERY tricky when this happens as your BRMS catalog is no longer reliable. Second thing is that the tape drive can be managed by 2 systems at the same time. When this happens neither system knows the exact state of the drive and the IOP/IOA goes bunkers. Setups like this can run for a while and then when you get an error situation the entire set up goes belly up. So whatever you are doing one system should be able to see the tape drive but NOT the other system. To get out of the situation quickly you should reboot the IOP, but as it is usually also used for other storage like disks this is not so easy. So meanwhile switch the resource from one partition to the other on the HMC. Either manually, automated (LPAR toolkit) or scheduled. Please consider to have BRMS installed on all partitions. The only additional option to buy is the Networking feature of BRMS. Licensing is as per machine and not as per LPAR as far as I know.
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