HP StorageWorks EVA iSCSI Connectivity Option Release Notes (5697-5472, February 2006)

Rebooting n ew mpx100 firmware

Important note–reboot of the mpx100 to activate a new version of firmware can result in a

lost connection between a single-path iSCSI initiator and the mpx100 iSCSI por t.

Although the average mpx100 reboot time is under 50 seconds, the reboot can result in a lost connection

between a single-path iSCSI initiator and the mpx100 iSCSI port.

NOTE:

In dual MPX100 multipath con figurations, a lost connection to the upgraded MPX100 does not disrupt

I/O to a multip ath iSCSI initiator, bec ause I/O fails over to the other MPX100 iSCSI ports.

Workaround

HP recommends that activity on the interfaces be suspended prior to activation of new firmware.

Ordered tagged command queuing

Important note—Ordered tagged commands are not supported

Ordered delivery of SCSI commands cannot be guaranteed for applications running on iSCSI initiators

that use ordere d tagged commands

Workaround

HP is investiga ting a fix for future release of mpx 100 firmware.

iSCSI networks for mpx100 GbE ports

Important note—HP recommends private iSCSI network for MPX100 GbE ports

The iSCSI technology is low cost, and uses standardized network adapters and topology hardware.

However, existing networks must be evaluated for suitability regarding their capacity to support iSCSI

storage. HP recommends using a private Gigabit Ethernet network between the iSCSI initiators and the

mpx100 in any iSCSI configuration, to ensure adequate per formance as well as data security.

Workaround

If dedicated switches are not used, consider separate VLANs (vir tual L ANs).

Resolving IP conflicts

Important note—resolving an I P conflict on a mpx100 if the IP port does not clear the LED

indication on the mpx100

When the mpx100 recognizes an IP conflict with its managem ent ports, the mpx100 indicates this

condition by blinking its fault LED four (4) times, once p er second and then off for two (2) seconds. The

following error message is d isplayed:

checkDuplicateIp: Detected Error MAC address

The mana gement port is still enabled, and it is still using its IP address.