how to recover catalog?

Question

in my other thread (https://vox.veritas.com/t5/NetBackup/first-time-NBU-install-DR-exercise/m-p/820402#M221643), i'm trying to simulate a DR scenario where i manage to have a replacement server only and the tape libraries are not up or configured yet. just the server installed with the same OS and NBU version as the production server (7.6.0.3 in this case). also the email that contains the catalog file sent by the catalog backup policy.

think total server crash or melt down.

now that i am at that point where the standby server and the NBU are at same version and are online, how to proceed in recovering the catalog pending tape library installation? (i'm trying to follow this link https://www.veritas.com/support/en_US/article.TECH28722 but i'm afraid it's too outdated and doesn't fit my scenario).

marianne2 · Accepted Answer

dd is best used with inactive, unmounted filesystems.
You now have a Linux EXT4 filesystem error.
Not NBU.

You know which catalog recovery method is supported....

Supported catalog replication methods are documented in NBU High Availability guide.

mph999 · Answer

OK, this is how it works.A catalog backup consists of x4 jobsParentNBDB stagingBackup of NBDB staging area = backupid_1Backup of /usr/openv/netbackup/db/images and other config files &nbsp;= backupid_2Although there are two seperate backup jobs (which could be on different media) there is only one DR file/ email. &nbsp;The DR file will have the name of the catalog policy and the ctime of the last backup job, that being the backup of the ... db/images area.There is no need to import catalog tapes for a recovery, the DR file acts as the 'catalog' - this is a mistake often made, though it makes no difference if you import the tapes, it won't cause any harm.The basic steps are to make sure you have the correct DR file, the media is in the library and an inventory has been run (so on a blank system you have to configure the devices). &nbsp;The barcodes / media ID config rules should be such that they match the original system so that everything matches up. &nbsp;NBU versions need to be exactly the same, and install paths the same. &nbsp;It gets more complex if the NBDB location has been moved, but I'm presuming that hasn't happened here.It should then just be a case of running the recovery wizard and specifing the location/ name of the DR file.The image files referred to in the email are the two backups that I mentioned above. &nbsp;IF you look at the two ctimes, they are just 90 seconds apart, the one ending 212_FULL is the NBDB backup, the other ending 292_FULL is the /db/images backup.

marianne · Answer

As per my replies to your other post -by following steps in Disaster Recovery chapter of Troubleshooting Guide for your NBU version and by ensuring that you backup catalogs to media that can be quickly and easily presented to new media server. MSDP is not one of them. Unless you have a fully functional MSDP Master/media server at a DR site with AIR replication of all backups to DR master/media.

manatee · Answer

i read that already and some other guides. i think the problem is they talk about concepts like "disaster recovery file", "catalog image file", and so on without really defining what are they, what they look like, and where are they located. this is my issue. unless i missed those definitions.

the file attached to the email being sent by the catalog backup policy what is it called? i thought just by following what's stated in that email i can recover my catalog (tape library and associated hardware are a non-issue; just want to bring NBU master/media server back online).

manatee · Answer

just want to share the part of the contents of the email i'm trying to follow:Disaster Recovery Procedure using the DR Image File

In the event of a catastrophic failure, use the following procedure to rebuild the previous NetBackup environment.

Note:	If new hardware is required, make sure that the devices contain drives
capable of reading the media and that the drive controllers are capable of mounting the drives.

1. Install NetBackup.
	2. Configure the devices necessary to read the media listed above.
	3. Inventory the media.
	4. Make sure that the master server can access the attached DR image file.
	Start the NetBackup Recovery Wizard from the NetBackup Administration
	Console.  Or, start the wizard from a command line by entering
		bprecover -wizard.so i have that "DR image files" which was sent by email after the catalog backup policy finishes. that is also the same file i supplied to the "bprecover -wizard" where it failed saying:ERR - Failed to execute command /usr/openv/netbackup/bin/bpdm -restordir -jobid 2 -cn 1 -b master_1478149292 -c master (83)
Failed to recover catalog (83)so, as i followed that email to the letter and it fails, is it safe to say that the email generated by the catalog backup policy is erroneous?

marianne · Answer

Catalog recovery requires the same basic elements as a regular restore - catalog entries and the storage where the backup was written.

In a DR situation, there is no catalog. The dr-file is your catalog entry that contains the info about where exactly the catalog was backed up to.

There is a section in NBU Admin Guide I that explains parts of the catalog as well as the Catalog Backup policy.

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how to recover catalog?

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