HP StorageWorks EVA iSCSI Connectivity Option 5.1 release notes (5697-7321, January 2008)

iSCSI initiator

LUNs disappear af ter changing the initiator iqn name

The mpx100 main

tains a database of targets, initiators a nd LUNs and the corresponding links between

them. Whenever

Command View presents or removes a LUN from an iSCSI initiator, it updates the

mpx100’s database. W hen a new iqn name logs into the mpx100, it is considered a new initiator and

no LUNs are assigned to it. All LU N assignments to the old iqn are still maintained.

Workaround

Using Command View EVA, unpresent the LUN from the old initiator iqn and then present it to the

new initiator iqn name. Remove the old initiator from the mpx100 database with either the mpx100

Manager GUI or the CLI.

Windows iSCSI initiators must add Tcp1323Opts to registry

Timestamps h

elp TCP measure round trip time (RTT) accurately to adjust retransmission timeouts. The

Timestamps option provides two timestamp ﬁelds of 4 bytes each in the TCP header: one to record the

time the initial transmission is sent, and one to record the time on the remote host.

To enable ti

mestamps, the Tcp1323Opts entrymustbesettoREG_DWORD = 2 under

HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters.

Installing the Windows iSCSI initiator from the HP StorageWorks iSCSI Connectivity Option for Enterprise

Virtual Array Windows software kit automatically adds this registry setting.

Workaround

Make the change to the registry, or cut and paste the following lines to a text ﬁle named

tcp1323opts.reg.

REGEDIT4

[HKEY_LO CAL_M ACHINE\SYSTEM\Current-

ControlSet\Services\Tcpip\Parameters]

"Tcp1323Opts"=dword:00000002

Double-click the ﬁle to add changes to the registry for the iSCSI initiator.

CAUTION:

Using the Registry Editor incorrectly can cause serious problems that can require reinstallation of the

operatingsystem. Backuptheregistrybeforemakinganychanges. UsetheRegistryEditoratyour

own risk.

Command View EVA

This section describes impor tant Command View EVA information.

Command View EVA refresh

Command View EVA refresh interval can affect controller property ﬁeld information.

Workaround

To ensure tha t you retain iSCSI controller property ﬁeld information in Command View EVA, do one

of the following:

EVA iSCSI Connectivity Option 5.1