Walid Hegazy

How To Do :) IT

DPM Is Not Writing On Tape !!!

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Hi … today we are going to discuss some of the problems you might face while tacking backup using DPM 2012 on tape library..

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First error I faced not too long ago is access denied error

Error: The operation failed because of a protection agent failure. ID 998 Details: Access is denied (0x80070005)

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After Some investigation I figured it out it was Driver issue Smile

after updating all  the tape drives driver to the native Windows LTO tape drivers

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After doing this its working perfectly…Smile

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second error you might face is due to timeout

The operation failed because of a protection agent failure. (ID 998 Details: The semaphore timeout period has expired (0x80070079))

There is support article I found for this issue http://support.microsoft.com/kb/170359.

to resolve it added a DWORD in Registry in this path on your DPM server…

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Tcpip\Parameters

Value Name:  TcpMaxDataRetransmissions
Data Type:   REG_DWORD – Number
Valid Range: 0 – 0xFFFFFFFF
Default:     5

Set TcpMaxDataRetransmissions to 10

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Now, Backup will work fine…

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