HSG80 connections in failover mode

[CA997223]

We have an HSG80 pair configured in transparent failover mode attched to W2K servers with single HBAs via a common switch. (no secure path). By default there are two connections per server, one for contraoller A port1 and one for controller B port 2. These are renamed and used for LUN access conttrol.

If controller A fails then port 1 on control B will be active but these connections wont be in the unit LUN access control list..

Is the HSG smart enough to use the existing defined connections or must connections be defined mannually and added to the LUN access list for the failover senario??

Tim Hughes

[david5337_1]

Yes,you are right.

[CA997223]

Yes, its smart enought to do it itself
-or-
Yes, I must define the connection manualy?

Tim

[luke_23]

By LUN ACL I assume you mean the connection aliases to which you enable access to specific units (set d1 access=!newcon12 etc.)?
If so, yes you will have to enable access to all connections. (As you have 1 hba per server and one switch, it's not such a daunting task.)

Once you have enabled access to all available connections, the HSG will then use the appropriate connection for the controller which the unit is online to. Should this connection fail at any point, it will automatically move the unit online to the second controller to utilise that path.

[david5337_1]

Luke,thanks for you detail information.

[Orrin]

Hi Tim,

The problem with doing that is windows sees both paths to the same disk and thinks its two disk, hence the necessity for secure path..

hope this helps,

Orrin.