Brocade Communications Systems StoreFabric SN6500B Administrator's Manual page 275

TABLE 10
General errors and conditions
Problem
A performance drop occurs when using DPM on a Microsoft
Windows system to back up to a Scalar 500i tape library.
When attempting to add a LUN to a container, the error
message "Commit failed (db propagation)." is returned.
In an HA cluster after failover, when using the cryptocfg
--show -hacluster -all command, the failover status
displays on one cluster member, but does not display on
the other cluster member.
Fabric OS Encryption Administrator's Guide (SKM/ESKM)
53-1002721-01
General encryption troubleshooting
Resolution
Change the DPM behavior to send one request at a time by adding DWORD
"BufferQueueSize" under
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft Data Protection
Manager\Agent, and set the value to 1.
Then restart DPM servers: MSDPM, DPMLA, DPMRA.
If you are using Fabric OS version 6.3.x, you may be attempting to add a LUN
after you have reached the limit of 512 LUNs per initiator in a container.
Beginning with Fabric OS version 6.4.0, you will receive an error message that
informs you that the maximum limit has been reached.
In this particular case, the correct status is displayed when group leader node
is queried. If the other node is queried, the status not consistent with the
actual HA status. To be sure of the correct status issue the cryptocfg --show
-hacluster -all command on the group leader node.
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