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Alireza Babri Absent Member.
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LTO3 cartridges cannt be used due to catalog protection (pls Help)

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The strategy is:
1 -we have ovdp 5.5 installed.
2- we run backup schedules with some protection policies to save them from being overwritten.
The Problem is:
1- When the cartridge is full we cannot use it for backup till all the protections get expired. (even if just 1MB of data is protected, we cannot use the rest of the cartridge capacity to overwrite backup data on them)
2- Now we are running out of capacity , it is a big issue. please help
my email is babri@itindigo.com
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OldSchool Absent Member.
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Re: LTO3 cartridges cannt be used due to catalog protection (pls Help)

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"2- we run backup schedules with some protection policies to save them from being overwritten....... we cannot use the rest of the cartridge capacity to overwrite backup data on them)"


that is to be expected. depending upon your media usage ( appendable, appendable of incremental, non-appendable) and allocation (strict / loose), and protection settings.

tape media in not direct access. As long as a protected object exists on the tape, the tape won't be "overwritten", altough it can be appended to (depending on the settings noted). and you can't use the unprotected space at the begining, even if the only protected data is at the end of the tape.

one common error involves not allowing for the time it takes to do a backup when calculating the retention periods. You ususally need to set this 1 day less than you think, because protection duration is based on the last protected object (ie. when the protected backup finished). for example, a tape used every friday with a protection of 7 days will be protected from the time of the last object on the prior friday. when the following friday's backup starts those objects are still protected. in cases like this, the protection would need to be set to 6 days, so that it expires prior to the subsequent friday's backup.

you have some options, and its going to depend on what you want to accomplish:

1) add more media
2) change the policies noted above to better match your usage
3) recyle media, which removes protection. BEWARE - this can cause unintended loss of valid backups!!!


In any case, you need to reexamine the policies noted above so that media becomes available at a usable time. without knowing how they are set currently, and what you hoped to accomplish, I can't provide anything further....
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OldSchool Absent Member.
Absent Member.

Re: LTO3 cartridges cannt be used due to catalog protection (pls Help)

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"2- we run backup schedules with some protection policies to save them from being overwritten....... we cannot use the rest of the cartridge capacity to overwrite backup data on them)"


that is to be expected. depending upon your media usage ( appendable, appendable of incremental, non-appendable) and allocation (strict / loose), and protection settings.

tape media in not direct access. As long as a protected object exists on the tape, the tape won't be "overwritten", altough it can be appended to (depending on the settings noted). and you can't use the unprotected space at the begining, even if the only protected data is at the end of the tape.

one common error involves not allowing for the time it takes to do a backup when calculating the retention periods. You ususally need to set this 1 day less than you think, because protection duration is based on the last protected object (ie. when the protected backup finished). for example, a tape used every friday with a protection of 7 days will be protected from the time of the last object on the prior friday. when the following friday's backup starts those objects are still protected. in cases like this, the protection would need to be set to 6 days, so that it expires prior to the subsequent friday's backup.

you have some options, and its going to depend on what you want to accomplish:

1) add more media
2) change the policies noted above to better match your usage
3) recyle media, which removes protection. BEWARE - this can cause unintended loss of valid backups!!!


In any case, you need to reexamine the policies noted above so that media becomes available at a usable time. without knowing how they are set currently, and what you hoped to accomplish, I can't provide anything further....
Shoghi Martinez Absent Member.
Absent Member.

Re: LTO3 cartridges cannt be used due to catalog protection (pls Help)

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This is the normal operation you can not overwrite protected tapes unless you recicled it or expiration arrives.

You must set the expiration time to almost 1 day before reuse the tape. You have the option to copy the objects that are still protected to another place, like a disk jukebox then recycle the tape and re use it.
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CBee Absent Member.
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Re: LTO3 cartridges cannt be used due to catalog protection (pls Help)

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Aside from recycling tapes, you can also change the protection of objects on the tapes.

I had a job that accidently had permanent protection on it. That prevented some tapes from overwriting. Since there where more objects on the tape (with reasonable protection) I just removed the protection from the permanent protected objects and now the tapes are usable as expected.
Things that go automatically, automatically go wrong...
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