josh at ai
Sep 2, 1998, 7:51 AM
Post #7 of 9
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From what I understand, you can have two initiators talking on the same
bus to two seperate devices without any problems. With just one disk, a
problem arises that when one of the initiators puts a scsi reserve on the
disk, no one else can talk to it. Apparently, the surviving node would
have to send a scsi reset command to get rid of the scsi reserve and start
accessing the disk again. Im not sure if the linux scsi driver sends out
a scsi reset when it is loaded or if that is something that needs to be
added especially for HA.
Unexamined faith is ignorance.
Bye
Josh
On Wed, 2 Sep 1998, David Lang wrote:
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> actually as long as they are on different scsi id's you should be able to,
> shouldn't you?
>
> David Lang
>
>
> On Mon, 31 Aug 1998, Medi Montaseri wrote:
>
> >
> > You might've covered this, but you know you can not have two initiators
> > on the same SCSI bus. I recall reading something about installing and
> > uninstalling the SCSI driver during take over.
> >
> > -------------------------------------------------------------------------
> > Medi Montaseri medi [at] CyberShell
> > Unix Distributed Systems Engineer HTTP://www.CyberShell.com
> > CyberShell Engineering
> > -------------------------------------------------------------------------
> >
> > On Mon, 31 Aug 1998, David Lang wrote:
> >
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> > > are you trying to run linux from the shared or local drive?`
> > >
> > > you may be able to swap the drive assignments by switching the slots of
> > > your scsi controllers.
> > >
> > > David Lang
> > >
> > >
> > > On Sun, 30 Aug 1998, Amit wrote:
> > >
> > > >
> > > >
> > > > Hello,
> > > >
> > > > I do not own but have access to HW needed for Linux HA. I am familiar
> > > > with Digital clusters for NT and at present the system uses this only.
> > > > ie both servers and Shared HDD power on at same instance and boot's
> > > > NT. After that one primary cluster server takes control of HDD and on
> > > > second server the HDD goes off line.
> > > >
> > > > I was trying to install Linux HA today. The HW is like:
> > > >
> > > > 2 * Intel PPro200MHz(Prioris HX6000) servers.
> > > > 2 * Ethernet cards on every system
> > > > 2 * SCSI Disk controllers on every system
> > > > One connected to local 2 GB HDD, CDRom.
> > > > Second connected to a 2GB disk on shared SCSI bus by differential Y
> > > > cable.(Actually this is a RAID array 310 box which contained 3*2GB HDD
> > > > utilized in RAID V, but to install Linux on servers I moved one HDD to
> > > > each server)
> > > >
> > > > Now the problem is that I am unable to boot Linux with keeping shared
> > > > HDD box ON. I tried several combinations to boot/install linux and
> > > > they are like-
> > > >
> > > > 1. installed on local HDD(/dev/sdb2). since /dev/sda1 = Shared HDD no
> > > > matter what I try/edit configuration. Anyway this happens in NT
> > > > installation as well.
> > > > 2. installed on shared HDD(/dev/sda1). when it comes lilo to boot the
> > > > system boots from local HDD and does not sees shared box at all. Even
> > > > though in lilo configuration during installation it asks for only two
> > > > things-first install lilo on MBR of /dev/sda1 & second is install lilo
> > > > files in /dev/sdb2. I tried both -but unsuccessful.
> > > >
> > > > Please tell me what to do!
> > > >
> > > >
> > > > Amit Gupta
> > > >
> > > >
> > > >
> > > > _________________________________________________________
> > > > DO YOU YAHOO!?
> > > > Get your free @yahoo.com address at http://mail.yahoo.com
> > > >
> > > >
> > >
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