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Exchange 2007 an Storage could not full backup via Commvault

hello Experts
recently i am facing a strange thing, there are several storage group on my Exchange 2007 CCR environment, there is one storage in each storage, i am backup it via Commvault.
recently i found one of storage could not do full backup, it always stack there on Commvault, and there is not any useful info from Commvault thats why it not success.
mailbox on this storage works well, and i did try enable circular log and then disable it, reset exchange information store service, dismount and mount the storage, all doesn't help, also i did check cluster function and replicate health, all is fine, so only this storage has backup issue, others is fine.
so do you know whats wrong with it? how and what else i need to check this storage group and storage? i have export Commvault backup log but i did not find out anything to help, let me know if you need read it first

thank you
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beardog1113
Asked:
beardog1113
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1 Solution
 
Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
Possible cause of backup failure could be Mailbox Database corruption.

Best solution. create a new Database move all mailboxes and be happy.

- Rancy
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Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
What is the size of Mailbox database ?
Any eventID's in the App logs ?
If the issue is with just one store that could be possible corruption ..... Does this take a VSS backup ? What is the Volume shadow status on all Drives ?
What is the amount of free space on the Drive where we have this Database ?

- Rancy
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beardog1113Author Commented:
hello Rancy, my answer is below

What is the size of Mailbox database ? 170GB

Any eventID's in the App logs ?
error 215(MSExchangeIS (8940) Storage 5: The backup has been stopped because it was halted by the client or the connection with the client failed. )
warning 914:Information Store (8940) The surrogate backup by Exch_MAIL1 has stopped with error 0xFFFFFFFF.

If the issue is with just one store that could be possible corruption ..... Does this take a VSS
YES

What is the Volume shadow status on all Drives ? (could you let know how to check it?)

What is the amount of free space on the Drive where we have this Database ? 486GB free space
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Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
What is the Volume shadow status on all Drives ? - Go to Properties of any of the drives and go to Shadow Copies tab and check if there is some limit or disabled ?

Mailbox database is 170 ...... how many total DB's do you have any other this big ?

- Rancy
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beardog1113Author Commented:
G Drive is to store database, total size is 1.6TBthis storage is not the biggest on my Exchange, the biggest one is almost 250GB.

thank you
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Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
What is the limit on that drive .... we have had many issues with Back Exec and VSS so we have had to make this to No linit and work with backups for few DB;s like in your case .... only Difference is we have E2k10 :)

- Rancy
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beardog1113Author Commented:
hello Rancy
for we are running CCR environment.
do you mean i should check "No limit" on all drives right?
and on both active and passive node right?

thanks
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Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
No noways .... just for the affected DB to check if that would help .... currently just on the Active node. Take a backup of that individual Database and then we will see what next to do :)

- Rancy
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Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
I mean make changes just on the particular dive on the active node .... to check if this resolves the issue. Hopefully should as we have been much disturbed and have worked on this issue.

- Rancy
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beardog1113Author Commented:
hello Racny
as i know for Commvault Exchange backup, if Exchange is CCR environment, backup date string only pick up data from passive node, or we can say if passive node is down, backup will not success.
so do you sure we only change it on active node?

any way i will try it first.

thanks
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Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
I was saying as per my experience as i work with Backup Exec and Active node.
If the backup happens with Secondary node please make sure the Copy status is healthy !!

But we can give both a try :)

- Rancy
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beardog1113Author Commented:
yes, Rancy
i am trying it, and copy status for all storage is healthy, i have check it before.
will let you know the result later.

thanks
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beardog1113Author Commented:
hello Racny
this doesn't help, backup task to pending status after 40mins same with before, and there is not any data transfer.
what is next i should try?

thanks
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Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
So you set the Shadow copy to no limit on the affected drive on both servers ... right
Same error in the App logs on the server ... Right ?
As all other DB's then it doesnt seems to be dome Server or connection issue. Hope no issues with the Tape drive where you are backing this Database ?

This is for Exchange 2000 but just a reference (check the cause)
http://support.microsoft.com/kb/810333

We can try to explore more things or plan for a new DB and move mailboxes across .... not sure but Exchange 2007 ENT has the option for 50 Stores why not break these stores into smaller chunks (just a thought)

- Rancy
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beardog1113Author Commented:
So you set the Shadow copy to no limit on the affected drive on both servers ... right
yes

Same error in the App logs on the server ... Right ?
yes

As all other DB's then it doesnt seems to be dome Server or connection issue. Hope no issues with the Tape drive where you are backing this Database ?
since other storage backup works well, so i don't think something wrong with tape library.

i will try some other options, if still not help i could only move all mailbox to a new storage, do you think that will100% fix it? :)

thanks
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Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
Ideally it should as i have seen some scenario if there is some DB Corruption in them ....
What best you can try is create new Mailbox DB move 5-7 users try with Backup :)

- Rancy
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beardog1113Author Commented:
looks like i could only create a new one and move all mailbox to.
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