1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
|
<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE topic PUBLIC "-//OASIS//DTD DITA Topic//EN" "topic.dtd">
<topic xml:lang="en-us" id="ts_win-host-iscsi">
<title>Running an iSCSI Initiator and Target on a Single System</title>
<body>
<p>
Deadlocks can occur on a Windows host when attempting to access
an iSCSI target running in a guest virtual machine with an iSCSI
initiator, such as a Microsoft iSCSI Initiator, that is running
on the host. This is caused by a flaw in the Windows cache
manager component, and causes sluggish host system response for
several minutes, followed by a "Delayed Write Failed" error
message in the system tray or in a separate message window. The
guest is blocked during that period and may show error messages
or become unstable.
</p>
<p>
Setting the <codeph>VBOX_DISABLE_HOST_DISK_CACHE</codeph>
environment variable to <codeph>1</codeph> enables a
workaround for this problem until Microsoft addresses the issue.
For example, open a command prompt window and start
<ph conkeyref="vbox-conkeyref-phrases/product-name"/> like this:
</p>
<pre xml:space="preserve">set VBOX_DISABLE_HOST_DISK_CACHE=1
VirtualBox</pre>
<p>
While this will decrease guest disk performance, especially
writes, it does not affect the performance of other applications
running on the host.
</p>
</body>
</topic>
|
