HP StorageWorks 12000 - Virtual Library System EVA Gateway Manual page 48

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
• 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
a max_lunid=32.