[Firewire-devel] RE: [Firewire-users] 4 node firewire cluster

[Bruce Carter]

Check /var/log/messages.

If it says the dive will support 2 concurrent logins then you can only have
two nodes.

If it says 4 you can theoretically have 4 nodes although I don;t know of
anybody who has done this.

Here is an extract from my /var/log/messages


May 17 07:12:10 ukdh364 kernel: ieee1394: sbp2: Query logins to SBP-2 device
successful
May 17 07:12:10 ukdh364 kernel: ieee1394: sbp2: Maximum concurrent logins
supported: 4
May 17 07:12:10 ukdh364 kernel: ieee1394: sbp2: Number of active logins: 0
May 17 07:12:10 ukdh364 kernel: ieee1394: sbp2: Logged into SBP-2 device
May 17 07:12:10 ukdh364 kernel: ieee1394: sbp2: Node[00:1023]: Max speed
[S400] - Max payload [2048]

This is a Lacie 120 GB drive

The 911 chipset seems to allow 4 logins.  I have seen this on two different
drives

My Lacie 250Gb drive has the 912 chipset and only allows 2.

I have a Maxtor 250Gb (One Touch II) ready to go in.

I will let you know what that says

P.S.  My configuration does not seem to decrement the number of logins on
the disk if a node powers down or reboots so I only get one cycle of reboots
before I have to power the disk off.

I also note that on one node powering off the machine powers off the drive
as well.
The other node doesn't.

I guess this because I have different firewire cards in each box.

Regards

Bruce


  -----Original Message-----
  From: firewire-users-bounces at oss.oracle.com
[mailto:firewire-users-bounces at oss.oracle.com]On Behalf Of Han Xie
  Sent: 18 May 2005 02:42
  To: Richard Ehrsam
  Cc: firewire-devel at oss.oracle.com; firewire-users at oss.oracle.com
  Subject: RE: [Firewire-users] 4 node firewire cluster


  Thanks for the reply Richard, but can you explain your answer please?

  Do you mean firewire disk can only support 2 nodes?  If so, there is no
way to setup a 4 node firewire cluster.

  Or, do you mean we have got the wrong disk?  Our disk has the chipset 911.
Which disk will support 4 node cluster please?

  Regards.
  Han
    -----Original Message-----
    From: Richard Ehrsam [mailto:Richard.Ehrsam at oracle.com]
    Sent: Wednesday, 18 May 2005 11:10 AM
    To: Han Xie
    Cc: firewire-devel at oss.oracle.com; firewire-users at oss.oracle.com
    Subject: Re: [Firewire-users] 4 node firewire cluster


    the hub is not your limitation, rather the disk device.

    Han Xie wrote:

      Hi,

      We try to setup a 4 node firewire cluster.  The firewire hub seems
only support 2 nodes at a time.  I wonder if anyone has setup a firewire
cluster with more than 2 nodes.  If so, may I ask what hub hardware is used
please?

      Thanks in advance and regards.
      Han

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Richard Ehrsam
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Oracle Support Services
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