mc/sg: multipath connect to diskarray

[singvey]

1、my two hosts connect to diskarray through two scsi hba separately.


what is the difference between one scsi hba conncector and two scsi hba connectors in mc/sg confiugration?
should I first configure alternate link with my two scsi hba to diskarray?

[Warren_9]

hi,

You should configure the alternate path and there is not difference in MC/SG configure.

[singvey]

hello warren:


1.should I configure my scsi id with difference scsi id ?

2.HOw to configure with different scsi id ?

3.If my host connect to diskarray through the fiber channel also with two fiber channel ,how should I configure with the two
fc interface???

[Devesh Pant_1]

Singvey,
there is nothing different as far as multipathing is considerd in MC Serviceguard. It remains the same. Do you have something like Powerpath ?

You only deal with the volumegroups and not the multipaths or the devices under the volmegroup in a package.

thanks
DP

[Geoff Wild]

Again - you don't need to configure anything for the HBA's (fibre channel cards) in MC/SG - that is a function of LVM - alternate paths....

Rgds...Geoff

[D Block 2]

one hba provides the only path to your disks. if your hba is bad, you will not be able to see your disks.

two hba(s) proved a much better arrangement, if your primary-hba goes bad, then you have an Alterate hba to access your disk luns. This is the reason to have 2-separate paths into your disk array.

[generic_1]

Do use two HBAs or your cluster may have a train wreck down the road.

[singvey]

thanks a lot