HP 12000 HP 12200 Gateway Virtual Library System User Guide (BW403-10001, June - Page 175

Administrator, RegEdit, Solution, Possible causes, Symptom

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Symptom Possible causes Solution VLS performance is being reduced by Windows Removable Storage Refer to the Microsoft website at: frequent tape drive polling. Manager service (RSM) polls tape drives on a frequent basis-every http://support.microsoft.com/ default.aspx?scid=kb;en-us;842411 or three seconds in Microsoft Windows complete the following steps to disable 2000, and every second in Windows RSM polling: Server 2003. Windows' built-in backup software (NTBACKUP) relies on the RSM polling to detect media changes in the tape drive. In SAN configurations, this RSM polling can 1. Install the 1.0.4.0 or later driver. 2. Disable device polling in the system registry. • Establish a CLI session. have a significant negative impact on tape drive performance. For SAN configurations, HP strongly recommends disabling RSM polling. • Log into the system as Administrator. • Run RegEdit and navigate to the following registry: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\hplto. • To disable RSM polling, 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. 4. Repeat this procedure for every server visible to tape drives. IMPORTANT: Adding or removing tape drives may cause an older driver .inf file to be reread, which can re-enable RSM polling. If tape drives are added or removed, check the registry for proper configuration. If necessary, repeat step 2 and 3 above. To disable polling in the HP SDLT driver (v3.0.2.0 or later): 1. Open the Device Manager on the server connected to the tape drive. 2. Double-click an SDLT tape drive. 3. Click the DLT tab. 4. Check Increase performance by disabling support for Microsoft Backup Utility. 5. Repeat this procedure for each server visible to each SDLT tape drive. At reboot, there are spurious critical FC port failures reported as notification alerts, usually on every port. Later, Info notification alerts for each FC host port are generated, indicating the FC ports are operating normally. This is expected behavior and does not indicate a problem. None After replacing drive 0 in a node, the A blank drive was installed in drive system will not boot. bay 0. If a blank drive is installed in drive bay 0, the system will not boot. To remedy this, switch the drive located in bay 0 with the drive located in bay 1. When oversubscription is enabled and When you disable oversubscription, Re-enable oversubscription, set the alert you create enough cartridges in a the system does not monitor the threshold so that the storage pool is storage pool to put your free storage storage pool's capacity, even to check within the capacity threshold, then wait capacity below the threshold, the pool that it is no longer at a critical level. for the pool to return to good (green) may reach critical status. If you then The status will not change. VLS Common Issues 175

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Solution
Possible causes
Symptom
Refer to the Microsoft website at:
h
t
tp://su
ppo
r
t
.mi
c
r
o
s
o
f
t
.co
m/
Windows Removable Storage
Manager service (RSM) polls tape
VLS performance is being reduced by
frequent tape drive polling.
de
f
a
ult
.a
s
p
x?s
c
i
d=kb;e
n
-u
s;8
4
2
4
1
1
or
drives on a frequent basis—every
complete the following steps to disable
RSM polling:
three seconds in Microsoft Windows
2000, and every second in Windows
Server 2003. Windows’ built-in
1.
Install the 1.0.4.0 or later driver.
backup software (NTBACKUP) relies
2.
Disable device polling in the system
registry.
on the RSM polling to detect media
changes in the tape drive. In SAN
•
Establish a CLI session.
configurations, this RSM polling can
have a significant negative impact on
•
Log into the system as
Administrator
.
tape drive performance. For SAN
configurations, HP strongly
recommends disabling RSM polling.
•
Run
RegEdit
and navigate to
the following registry:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\hplto.
•
To disable RSM polling, 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.
4.
Repeat this procedure for every
server visible to tape drives.
IMPORTANT:
Adding or removing
tape drives may cause an older driver
.inf file to be reread, which can
re-enable RSM polling. If tape drives
are added or removed, check the
registry for proper configuration. If
necessary, repeat step 2 and 3 above.
To disable polling in the HP SDLT driver
(v3.0.2.0 or later):
1.
Open the Device Manager on the
server connected to the tape drive.
2.
Double-click an SDLT tape drive.
3.
Click the DLT tab.
4.
Check
Increase performance
by disabling support for
Microsoft Backup Utility
.
5.
Repeat this procedure for each
server visible to each SDLT tape
drive.
None
This is expected behavior and does
not indicate a problem.
At reboot, there are spurious critical
FC port failures reported as
notification alerts, usually on every
port. Later, Info notification alerts for
each FC host port are generated,
indicating the FC ports are operating
normally.
If a blank drive is installed in drive bay
0, the system will not boot. To remedy
A blank drive was installed in drive
bay 0.
After replacing drive 0 in a node, the
system will not boot.
this, switch the drive located in bay 0
with the drive located in bay 1.
Re-enable oversubscription, set the alert
threshold so that the storage pool is
When you disable oversubscription,
the system does not monitor the
When oversubscription is enabled and
you create enough cartridges in a
within the capacity threshold, then wait
storage pool's capacity, even to check
storage pool to put your free storage
for the pool to return to good (green)
that it is no longer at a critical level.
The status will not change.
capacity below the threshold, the pool
may reach critical status. If you then
VLS Common Issues
175