HP StorageWorks MPX200 Release Note page 7

Mac server sleep mode
The ATTO Mac iSCSI Initiator does not support Mac server sleep mode. If sleep mode is enabled,
and the Mac server goes to sleep, the initiator can lose iSCSI connectivity to the logical unit numbers
(LUNs).
If the ATTO Mac iSCSI Initiator is installed, disable Mac server sleep mode.
Windows drops the IP connection
Certain I/O workloads can cause Windows to drop the IP connection, resulting in removal of a
LUN.
To restore the IP connection, reboot the system. To avoid dropped connections:
Reduce the I/O workload.
Reduce the application transfer size.
Windows registry modifications
CAUTION:
that require reinstallation of the operating system. Be sure to back up the registry before making
any changes.
If you use a method other than the HP StorageWorks MPX200 Multifunction Router Windows
software kit to update, you add the Tcp1323Opts and Disk TimeOutValue to the registry.
Timestamps enable TCP to accurately measure round-trip time (RTT) to adjust retransmission timeouts.
The timestamps option provides two 4-byte timestamp fields in the TCP header. One field records
the time of the initial transmission; the other field records the time on the remote host.
There are two methods to add Tcp1323Opts to the registry. HP recommends that you use the first
method.
IMPORTANT:
Multifunction Router Windows software kit, Tcp1323Opts is added to the registry automatically.
Method 1
To enable timestamps, under:
HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters, set the Tcp1323Opts
entry to REG_DWORD = 2.
To extend the timeout period, under: HKLM\System\CurrentControlSet\services\Disk,
set the TimeOutValue entry to REG_DWORD = 120.
Method 2
Make the change to the registry, or cut and paste the following lines to a text file named:
tcp1323opts.reg:
tcp1323opts.reg.
:
REGEDIT4
[HKEY_LOCAL_MACHINE\SYSTEM\Current-
ControlSet\Services\Tcpip\Parameters]
"Tcp1323Opts"=dword:00000002
Double-click the tcp1323opts.reg file to add the changes to the registry for the iSCSI initiator.
Use the Registry Editor at your own risk. Using it incorrectly can cause serious problems
When you install the Windows iSCSI initiator from the HP StorageWorks MPX200
Important notes 7