HP XP20000/XP24000 HP StorageWorks XP Disk Array Configuration Guide (T5278-96 - Page 74

Setting up virtual machines (VMs) and guest operating systems

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Setting up virtual machines (VMs) and guest operating systems Setting the SCSI disk timeout value for Windows VMs To ensure Windows VM's (Windows 2000 and Windows Server 2003) wait at least 60 seconds for delayed disk operations to complete before generating errors, you must set the SCSI disk timeout value to 60 seconds by editing the registry of the guest operating system as follows: CAUTION: Before making any changes to the registry file, make a back up copy of the existing file. 1. Start the registry editor: select Start > Run, enter regedit.exe, and click OK. 2. In the directory tree in the left panel, select HKEY_LOCAL_MACHINE > System > CurrentControlSet > Services > Disk. 3. In the right pane locate the DWORD entry "TimeOutValue." and right click. Select Modify, then set the data value to x03c (hexadecimal) or 60 (decimal). NOTE: If the DWORD "TimeOutValue" does not exist, click Edit > New> DWORD value and enter the name "TimeOutValue." Sharing LUNs To share LUNs between VMs within a single ESX server, set the SCSI controller to virtual mode. To share LUNs across multiple ESX servers or in a virtual to physical configuration, set the SCSI controller to physical mode. VMware ESX Server 2.5x 1. In the management interface, double-click the VM you plan to edit. 2. Click the Hardware tab, select the SCSI controller you will use for your shared LUNs, and then click Edit.... 74 VMware

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Setting up virtual machines (VMs) and guest operating systems
Setting the SCSI disk timeout value for Windows VMs
To ensure Windows VM’s (Windows 2000 and Windows Server 2003) wait at least 60 seconds
for delayed disk operations to complete before generating errors, you must set the SCSI disk timeout
value to 60 seconds by editing the registry of the guest operating system as follows:
CAUTION:
Before making any changes to the registry file, make a back up copy of the existing
file.
1.
Start the registry editor: select
Start
>
Run
, enter
regedit.exe
, and click
OK
.
2.
In the directory tree in the left panel, select
HKEY_LOCAL_MACHINE
>
System
>
CurrentControlSet
>
Services
>
Disk
.
3.
In the right pane locate the DWORD entry “TimeOutValue.” and right click. Select
Modify
,
then set the data value to x03c (hexadecimal) or 60 (decimal).
NOTE:
If the DWORD “TimeOutValue” does not exist, click
Edit
>
New
>
DWORD value
and
enter the name “TimeOutValue.”
Sharing LUNs
To share LUNs between VMs within a single ESX server, set the SCSI controller to virtual mode. To
share LUNs across multiple ESX servers or in a virtual to physical configuration, set the SCSI
controller to physical mode.
VMware ESX Server 2.5x
1.
In the management interface, double-click the VM you plan to edit.
2.
Click the
Hardware
tab, select the SCSI controller you will use for your shared LUNs, and then
click
Edit...
.
74
VMware