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Procedure F: HP Data Protector
Quantum TC2201 User’s Guide 133
Figure 50 Netvault Device
Management
Procedure F: HP Data Protector 1
In order to increase the maximum block size on a Windows Media Agent
client, you must first modify its Registry. After modifying the Registry,
restart the computer. Drivers read MaximumSGList at boot time. The
actual formula that a Windows class driver uses to determine the
maximum transfer size is:
maximum size = ((number of supported scatter/gather elements - 1)*
4096)
For the typical aic78xx case, it renders the following:
((17-1) * 4096) = 64k (which corresponds to 56k usable data for Data
Protector)
Windows provides a mechanism to support more scatter/gather
elements via the Registry.
6 Start the regedit32 and add a DWORD value in the following
Registry key:
\\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Servic
es\aic78 xx\Parameters\Device0\MaximumSGList