[Veritas-vx] D1000 & DMP

[Carl Ma]

Hi,

Eric Sales hits the nail on the head. After I change FailoverDelay to 20. The 
DMP works seamlessly.

Thanks for the suggestions from Darren Dunham and Nawir.

carl 
:Date: Wed, 19 Feb 2003 11:02:18 -0800
:From: "Sales, Eric" <Esales at ea.com>
:Subject: RE: [Veritas-vx] D1000 & DMP
:To: "Carl E. Ma" <carl_ma at scotiacapital.com>
:Cc: Veritas-vx at mailman.eng.auburn.edu
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:
:You might want to check the JNI hba configurations (i.e. jnic.conf
:depending on which card you are using)
:Some previous versions of the HBA drivers set the FailoverDelay to 0
:(disabling hba failover).
:Try setting it to 30 seconds.
:
:~Eric Sales
:s y s t e m s  a r c h i t e c t
:Worldwide Technology Services & Operations
:ea / ea.com
:
:-----Original Message-----
:From: Carl E. Ma [mailto:carl_ma at scotiacapital.com] 
:Sent: Tuesday, February 18, 2003 8:08 PM
:To: Darren Dunham
:Cc: Veritas-vx at mailman.eng.auburn.edu
:Subject: Re: [Veritas-vx] D1000 & DMP
:
:Hi,
:
:I also have a similar situation. We are using JNI DUAL port Fibre card
:connect to a Sun T3 partner group,which has two RAID5 luns.(two T3
:connected together to avoid single controller failure). After I
:installed the JNI driver, I can see four disks from OS level and VxVM
:finds both controller(each port is a separate controller).
:
:However when I disconnect one channel from JNI card to the T3 disk
:group, system can't automatically fail over to another channel and the
:system is not usable then. I have to reboot to isolate the failed
:link.Did I miss anything? 
:
:thanks,
:
:carl
:
:On Tue, 2003-02-18 at 18:55, Darren Dunham wrote:
:> > I want to know if I have two Diff Scsi interfaces in one machine and
:> > independently connected to a D1000, can I have DMP configured using
:> > VXVM in case one of the controllers fail, the system will be up and
:> > running
:> 
:> Possibly, but I wouldn't recommend it.  To use DMP, you would have to
:> have the same disks on both controllers.  It's possible for a
:controller
:> to fail in a way that jams the bus, so you'd still lose access from
:the
:> remaining controller.
:> 
:> If you have a D1000, I'd prefer to split the disks, attach a
:controller
:> to each side, and mirror the disks instead.  The possibility of a disk
:> failure is higher than a controller failure (I'm assuming), so you'd
:> still want to have some sort of mirroring anyway.
:> 
:> 
:> -- 
:> Darren Dunham
:ddunham at taos.com
:> Unix System Administrator                    Taos - The SysAdmin
:Company
:> Got some Dr Pepper?                           San Francisco, CA bay
:area
:>          < This line left intentionally blank to confuse you. >
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