HP-UX iSCSI Software Initiator B.11.31.01 Release Notes (October 2007)

Chapter

HP-UX iSCSI Software Initiator Release Notes

What’s New

The Next Generation Mass Storage Stack in HP-UX 11i v3 introduces significant new features. This iSCSI

driver release extends those features to iSCSI devices. For more information on HP-UX 11i v3 storage

technology, see Overview: The Next Generation Mass Storage Stack, at:

http://docs.hp.com/en/oshpux11iv3.html

New features in Revision B.11.31.01 of the HP-UX iSCSI Software Initiator include:

• New task management functions are supported, including:

—Warm target reset

—Abort task set

—Clear task set

—LUN reset

See the scsi manpages to determine which of these can be issued from the user space.

• You can use rmsf to delete an operational session.

• Dynamic throttling down of I/Os during memory crunch. When the system is in a low-memory condition,

iSCSI I/O processing is throttled down. Once the system recovers from the memory crunch, iSCSI I/O

processing recovers to the original level.

• In HP-UX versions prior to 11i v3, if there is no I/O traffic to an inaccessible iSCSI device, the device state

would display as NO_HW in ioscan and ONLINE in iscsiutil. This is corrected now.

• After adding a canonical target using iscsiutil, there is no need to run ioscan. The target is scanned

and luns are discovered automatically. However, if devices are expected to be discovered through SLP, you

must still run ioscan.

• A new I/O node, isvctlr is introduced beneath iSCSI I/O node in the 11i v3 new style I/O tree. This I/O

node corresponds to iSCSI software initiator.

• The statistics have been updated and enhanced.

•The iswd daemon now does not create one thread per TCP connection with the target. It uses one process

as a server that fetches requests from the driver, while another process establishes and manages the TCP

connections with all the targets.

Limitations

The following information is for revision B.11.31.01 of the HP-UX iSCSI Software Initiator.

• iSCSI usage of IPSec is supported on HP-UX, however, the HP-UX iSCSI Software Initiator has not been

tested with IPSec due to the lack of iSCSI targets that support IPSec.

Support of IPSec with the HP-UX iSCSI Software Initiator is dependent on the availability of iSCSI

targets that support IPSec and target vendor testing of the HP-UX iSCSI Software Initiator with those

targets.

• The HP-UX iSCSI Software Initiator does not support IPv6 addresses.

• The HP-UX iSCSI Software Initiator does not support the definition of the boot, root, primary swap,

dump, or var volumes on iSCSI physical volumes.