[Veritas-vx] D1000 & DMP

[Sales, Eric]

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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