Sharing drive array between two Solaris servers

Sharing drive array between two Solaris servers

Post by Dund » Sun, 13 Feb 2000 04:00:00



Hi!

I have two Solaris servers (Sun E250) and StorEdge D1000 drive Array
with 6 SCSI drives inside. What I'd like to do is make a sort of
failover system. I've tried to share StorEdge array between two servers.
On included schematics you can see my current connections between SCSI
devices. There is also crossover Ethernet cable connection between
servers which I'd like to use as a 'heartbeat' (not on drawing).

Main problem is: I just can't make them work together. Each server works
perfectly with StorEdge when separated from this configuration.

In each of these servers I have differential SCSI card. All hardware is
genuine SUN.

Anybody can give me any help on this article?

Regards,

Dundo

Schematics:

       ---SCSI PORT A   <--
      /                   |
E250-1                    |
      \                   |
       ---SCSI PORT B     |  <--
                          |    |
                          |    |
       ---SCSI PORT A1  <--    |
      /                        |
     /   -SCSI PORT A2         |  <--
    /   /                      |    |
StorEdge                       |    |
    \   \                      |    |
     \   -SCSI PORT B1         |    |  <--
      \                        |    |    |
       ---SCSI PORT B2  <-------    |    |
                                    |    |
                                    |    |
       ---SCSI PORT A   <------------    |
      /                                  |
E250-2                                   |
      \                                  |
       ---SCSI PORT B   <-----------------

 
 
 

Sharing drive array between two Solaris servers

Post by acs.. » Wed, 16 Feb 2000 04:00:00




> Hi!

> I have two Solaris servers (Sun E250) and

StorEdge D1000 drive Array
Quote:> with 6 SCSI drives inside. What I'd like to do
is make a sort of
> failover system. I've tried to share StorEdge

array between two servers.
Quote:> On included schematics you can see my current

connections between SCSI
Quote:> devices. There is also crossover Ethernet cable
connection between
> servers which I'd like to use as a 'heartbeat'
(not on drawing).

> Main problem is: I just can't make them work

together. Each server works
Quote:> perfectly with StorEdge when separated from
this configuration.

> In each of these servers I have differential

SCSI card. All hardware is

Quote:> genuine SUN.

> Anybody can give me any help on this article?

> Regards,

> Dundo

> Schematics:

>        ---SCSI PORT A   <--
>       /                   |
> E250-1                    |
>       \                   |
>        ---SCSI PORT B     |  <--
>                           |    |
>                           |    |
>        ---SCSI PORT A1  <--    |
>       /                        |
>      /   -SCSI PORT A2         |  <--
>     /   /                      |    |
> StorEdge                       |    |
>     \   \                      |    |
>      \   -SCSI PORT B1         |    |  <--
>       \                        |    |    |
>        ---SCSI PORT B2  <-------    |    |
>                                     |    |
>                                     |    |
>        ---SCSI PORT A   <------------    |
>       /                                  |
> E250-2                                   |
>       \                                  |
>        ---SCSI PORT B   <-----------------

At first glance it looks like a problem we had
doing pretty much the same thing. It has to do
with the SCSI initiator information both of the
hosts are using (since it is in effect a shared
SCSI bus). Sun's info doc 20704 describes how to
change this on both PCI and SBUS systems.

--
Chris Stoner
Motorola Global Architecture and Technology
Integration

Sent via Deja.com http://www.deja.com/
Before you buy.

 
 
 

Sharing drive array between two Solaris servers

Post by Stev » Sun, 20 Feb 2000 04:00:00



> Hi!

> I have two Solaris servers (Sun E250) and StorEdge D1000 drive Array
> with 6 SCSI drives inside. What I'd like to do is make a sort of
> failover system. I've tried to share StorEdge array between two servers.
> On included schematics you can see my current connections between SCSI
> devices. There is also crossover Ethernet cable connection between
> servers which I'd like to use as a 'heartbeat' (not on drawing).

> Main problem is: I just can't make them work together. Each server works
> perfectly with StorEdge when separated from this configuration.

> In each of these servers I have differential SCSI card. All hardware is
> genuine SUN.

> Anybody can give me any help on this article?

> Regards,

> Dundo

> Schematics:

>        ---SCSI PORT A   <--
>       /                   |
> E250-1                    |
>       \                   |
>        ---SCSI PORT B     |  <--
>                           |    |
>                           |    |
>        ---SCSI PORT A1  <--    |
>       /                        |
>      /   -SCSI PORT A2         |  <--
>     /   /                      |    |
> StorEdge                       |    |
>     \   \                      |    |
>      \   -SCSI PORT B1         |    |  <--
>       \                        |    |    |
>        ---SCSI PORT B2  <-------    |    |
>                                     |    |
>                                     |    |
>        ---SCSI PORT A   <------------    |
>       /                                  |
> E250-2                                   |
>       \                                  |
>        ---SCSI PORT B   <-----------------

Have you considered a server cluster arrangement?
I don't know anything about sun but there are packages available
for linux, etc.
The way cluster works is the servers share scsi drives with one server being
basically
a master and the other slave. If either fail, the other takes over the
failed servers
tasks and the data is commonly shared. I am no expert but it might be worth
looking at. Be interested to hear if others are running clusters and do they

work ok.

Cheers,
Steve

 
 
 

Sharing drive array between two Solaris servers

Post by Anthony W. Youngma » Tue, 22 Feb 2000 04:00:00


> -----Original Message-----


> Posted At: Saturday, February 19, 2000 6:49 AM
> Posted To: admin
> Conversation:      Sharing drive array between two Solaris servers
> Subject:   Re: Sharing drive array between two Solaris servers

> We had requests to setup and test SHARED access between two UNIX
> boxes,
> a UNIX and a NT, and a two NT boxes.  We told the product manager to
> stop drinking his lunch.  DEC is the only vendor that can have two
> systems SIMULTANEOUSLY accessing a shared disk and only with their
> hi-speed memory interconnect product on both systems.  It creates a
> UNIXcluster which has similar characteristics to a VMScluster (shared
> memory and process space, coordinated disk access, automatic
> failover).
> Since DEC wasn't one of the systems that was on the first tier for
> testing, the product manager when away (at least until he had another
> liquid lunch).  SUN and Linux still can't do this.

Rumour - note RUMOUR - is that linux will emulate VAX clustering some
time this year. As far as I am aware, nobody has succeeded so far
(including MS, who "acquired" a large slice of the VMS development team
:-)

It'll be a major coup if linux can do VAX-style clustering soon <g>

 
 
 

1. Sharing drive array between two Solaris Servers

think about this:

There is probably a good reason why sun ONLY SUPPORTS CERTAIN OF ITS ARRAYS
with its cluster products that do disk sharing.

i dont think the D1000 is one of them.

BTW: you really went overboard with the crossposting.

--
[Trim the no-bots from my address to reply to me by email!]
[ Do NOT email-CC me on posts. Pick one or the other.]

The word of the day is mispergitude

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