HP StorageWorks 6000 HP StorageWorks VLS and D2D Solutions Guide (AG306-96028, - Page 48
Windows using the HP LTO tape driver: Disable Windows Removable Storage Manager RSM.
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For an HP-UX 11.31 server using persistent DSFs, the maximum number of LUNs per bus on the server can be increased by entering # scsimgr set_attr -a max_lunid=32. • Disable unnecessary polling/diagnostic applications that can interfere with backups or impact performance. • Windows: Disable Windows Removable Storage Manager (RSM). 1. Disconnect the Windows node from the SAN (unplug all Fibre Channel cables). 2. Delete all files and subfolders under the ..\system32\NtmsData folder (location of the system32 folder varies with different Windows versions). 3. Enable and start the Removable Storage service in the Microsoft Computer Management applet. 4. Access the Removable Storage (My Computer/Manage/Storage/Removable Storage) in the Microsoft Computer Management applet. 5. Verify that there are no tape or library devices listed. 6. Stop and disable the Removable Storage service in the Microsoft Computer Management applet. 7. Reconnect the Windows node to the SAN (plug all Fibre Channel cables back in). 8. Reboot. • Windows using the HP LTO tape driver: Disable Windows Removable Storage Manager (RSM). 1. Install the 1.0.4.0 or later driver. 2. Complete one of these steps: a. The driver package contains a DisableAutoRun.reg file that can used to modify the system registry. Log into the system as a user with Administrative privileges and double-click the DisableAutoRun.reg file. The system will prompt you to confirm. Enter Y or Yes to modify the appropriate registry entry and disable polling. b. If the driver package does not include the DisableAutoRun.reg file, manually edit the system registry using RegEdit. Log into the system as a user with Administrative privileges, run RegEdit, and navigate to the following registry key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\hplto Edit the AutoRun value found in this key. A value of 0 (zero) indicates that polling is disabled; a value of 1 indicates that polling is enabled. 3. After completing steps 1 and 2, reboot the affected system. IMPORTANT: Adding or removing tape drives from the system may cause an older driver inf file to be re-read, which in turn can re-enable RSM polling. If tape drives are added or removed, check the registry for proper configuration and, if necessary, repeat step 2. • Windows: Disable Windows Test Unit Ready polling. Information is available at http://support.microsoft.com/kb/842411. • HPUX: Ensure the EMS is not polling tape drives by either disabling it or by copying the archived dm_stape.cfg file to the /var/stm/config/tools/monitor folder, and the polling interval can be set to 0 to disable polling. 48 Backup Solution Design Considerations