SSA Loop Verification Question (graphics)

From: Bill Verzal (BVerzal_at_KOMATSUNA.COM)
Date: 04/25/03

  • Next message: Erin Michaud: "NFS help" 
    Date:         Fri, 25 Apr 2003 08:41:26 -0500
To: aix-l@Princeton.EDU

    All,

    I have attached a JPG image of a proposed SSA loop configuration. I would
    like your feedback on it if you don't mind. Here is the scenario...

    I have (5) 7133-020 drawers and (5) hosts. There are 80 disks in the
    drawers (all 5 drawers are full).

    Currently, I have 36 devices in loop A and 52 in loop B (this is just the
    way it is now - I did not wire it up).
    Loop A is broken down 32 drives and 4 hosts (5 counting the host the map
    was drawn from).
    Loop B is broken down 48 drives and 4 hosts (5 counting the host the map
    was drawn from).
    After adding the last 8 drives I am getting SSA_DEGRADED_ERROR on my hosts.

    Please take a look at the JPG and offer your opinions.

    The goal of the proposed changes is to keep the front 8 drives isolated
    from the read 8, as they contain different data. Currently, front and rear
    drives cross over all over the place.

    Thanks, Bill.

    (See attached file: SSALoops.jpg)
    ___________________________________________
    Bill Verzal
    AIX Admin/Komatsu America
    (847) 970-3726 (v)

    SSALoops.jpg
  • Next message: Erin Michaud: "NFS help"

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