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15Data Replication Manager HSG80 ACS Version 8.7P Release Notes
Windows 2000 Plug and Play Manager Generates Numerous Pop-up Windows
Each time a LUN is dismounted ungracefully (for example a fabric failure), Windows 2000
displays a pop-up window that warns of “Unsafe removal of device.” This window can be
cleared by simply clicking OK. The window itself is harmless, but additional dismounts cause
more pop-up windows to appear. These windows can stack up on the desktop and consume
memory to the point that the system crashes. However, several hundred dismounts and
associated pop-up messages are required before a system crash is probable.
Windows Using Large LUNs While in SCSI-2 Mode
DRM supports Windows 2000 hosts accessing large LUNs above D7 without offsets via
Secure Path. However, all hosts using large LUNs on a controller in SCSI-2 mode must create
a dummy LUN 0 and give access to this LUN. HP also recommends that this phantom LUN be
set to “no write” access. Refer to the HP StorageWorks Secure Path for Windows Installation
and Reference Guide for additional information.
Association Sets
In a Windows 2000 cluster configuration, all remote copy sets within an association set must
be placed in one cluster resource group.
Microsoft Windows NT
Auto Failback
The Secure Path for Windows NT Auto Failback feature is not currently supported in a Data
Replication Manager configuration. Disable this feature by starting Secure Path Manager, and
then selecting Properties > Autofailback > Disable.
LUNs Lettered Incorrectly
When LUNs are moved between hosts (such as during a site failover or a site failback), the
LUNs may become “out of letter order.”
To prevent the “out of letter order” status, follow the steps below:
1. Before booting the Windows NT-X86 host, make sure all LUNs are failed over to one
HSG80 path. From the HSG80 CLI prompt, issue the following command:
Restart Other_Controller
2. Reboot the Windows NT-X86 host.
3. Use Disk Administrator to assign the correct drive letter so that the disks will now match
the units on the controller.
4. Once Windows NT sees the disks ordered properly, use Secure Path Manager to move the
units to the correct path.
Windows Using Large LUNs While in SCSI-2 Mode
DRM supports Windows NT hosts accessing large LUNs above D7 without offsets via Secure
Path. However, all hosts using large LUNs on a controller in SCSI-2 mode must create a
dummy LUN 0 and give access to this LUN. HP also recommends that this phantom LUN be
set to “no write” access. Refer to the HP StorageWorks Secure Path for Windows Installation
and Reference Guide for additional information.