958-000288-010, August 2005)

second-generation Edge Switch 2/24 switches cannot be downgraded earlier than

05.03 . 01, they must be conﬁgured in Homogeneous Fabric Interoperability mode to

remain concurrent. If this process is not followed, I/O through the switch may be

signiﬁcantly disrupted or stopped. Recovery for this situation is accomplished by

reactivating the current zone set.

If you are installing a new or replacement second-generation Edge Switch 2/12 or Edge

Switch 2/24 into an existing 05.xx.xx fabric, HP recommends that you downgrade

the unit before installing it into the fabric.

Downgrading to 05.05.00 is supported only on ﬁ rst-generation Edge Switch 2/12

switches. Second-generation Edge Switch 2/12 switches can be downgraded only to

05.05.01. Second-generation Edge Switch 2/24 switches can be downgraded only

to 05.03.01.

Firmware downgrades should not be performed using EWS and Internet Explorer

5.00.3315.1000x. If this operation is performed, the download operation may not

complete and may eventually tim e -out leaving the switch with the previous version of

ﬁrmware .

Logging out of Microsoft Windows after access to HAFM appliance is

recommended

After you access the HAFM appliance desktop via a web browser using the TightVNC

application, HP recommends that you log out of Microsoft Windows before disconnecting

your web

browser ac cess. This prevents unauthorized access to the HAFM appliance by

someone using the TightVNC application to access the HAFM appliance. When the

new user attempts to lo g into the HAFM appliance, the Welcome to Windows screen is

displa

yed, and a Windows user name and password are required to access the HAFM

appliance Windows desktop. HAFM remote client access does not require the HAFM

appliancetobeloggedintoWindows.

Zone FlexPar feature

Because zoning is managed on a fabric-wide basis, all switches and directors in the

fabric must ma intain the same zoning conﬁg uration. This conﬁguration is maintained

automatically through the Fibre Channel protocol.

To keep this information current, RSCN messages are sent through the fabric to inform

attached devices when zoning changes occur, when devices become available, or

when devices become unavailable. In the case where devices become available or

unavailable, RSCNs are sent only to the devices in the same zone. Zoning changes,

however, trigger RSCNs to be sent to all of the devices in the fabric. As fabrics grow

larger and larger, the quantity of RSCNs from zoning changes can create congestion

and disrupt devices, causing them to pause normal activity to determine the status of

the other devices. This can occur even if the new device is not zoned to talk to the

other devices in the fabric.

With the Zone FlexPar feature enabled, RSCN messages for a zoning change are

handled like RSCNs for availability/unavailability changes. Speciﬁcally, RSCNs are

HP StorageWorks HA-Fabric Mana g er release notes