RAID-1 on Dell PE 2850

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RAID-1 on Dell PE 2850

  • What am I doing wrong?

    I ve to start with "I'm no disk expert", so please be patient.

    My Dell machine order:
       - PowerEdge 2850,
       - 2 x 146GB SCSI Ultra320,
       - PERC 4 Embedded RAID Option.
       - C03 MR1, RAID 1 using on-board RAID controller.

    (I used the ITU Diskette from Sun for LSI Perc 4e/di drivers)
    I started the installation of Solaris 10 but I could only see one disk (c0t0d0) during installation. (?)
    I have two Scsi disks, and the idea is that they are set in RAID 1.

    Boot path says: /pci@0,0/pci-ide@1f,1/ide@0/sd@0,0:a

    Well, I continued the installation and Solaris 10 was finished and it run well.
    Now I wanted to test if RAID 1 was correct, "still".

    1. I removed disk 1 and restarted
    The system answered with:
       Following SCSI ID's are not responding
           Channel-0:0
       Please Inspect Enclosure Power, SCSI Cabling, and Drive Connections
       and Reboot Your System.

       1 Logical Drive(s) found on the host adapter.
       0 Physical Drive(s) found on the host adapter.
       1 Logical Drive(a) handled by BIOS
       0 Physical Drive(s) handled by BIOS
       Press to Run Configuration Utility or any other Key to Continue.


    2. I put back disk 1 and restarted
    Solaris 10 run.


    3. I removed disk 0 and restarted
    The system were angry now and I got response:
       1 Logical Drive(s) found on the host adapter.
       0 Physical Drive(s) found on the host adapter.
       1 Logical Drive(s) Degraded
       1 Logical Drive(a) handled by BIOS
       0 Physical Drive(s) handled by BIOS
       Configuration of NVRAM and drives mismatch (Normal mismatch)
       User Configuration....

       Run View/Add Configuration option of Config Utility
       Press A Key to Run Configuration Utility Or to Continue.

       ALT-F10 ...
       No boot device available -
           Strike F1 to retry boot, F2 for setup utility

           

    Now it seems that the RAID-1 was not correct, why does Solaris only find one disk ? where is the other one?
    How can I install Solaris and have the RAID 1 from the HW (controller)?

    When entering "Utility mode" I can see both disks.

    I cleared the configuration and recreated the raid set, and initialized.
    So the system is clean again, and I need to re-install Solaris, but please advice on how to get RAID 1 ?


    Please advice,

    Thank you!

    PS, do you think I need to change something in my BIOS ? or "Utility Manager"?

    Message Edited by JJJJooohhn on 12-12-2005 05:08 PM

  • JJJJooohn,

      You have a RAID one here in your examples, the bit you are missing is that with any H/W RAID, the controller reports only the VIRTUAL disk to the operating system, so a RAID 5 with 14 drives will be seen as a single drive, and the same with a RAID 1.

    warwizard

  • Thank you WarWizard,
     

    I've now re-installed Solaris 10 again and the RAID-1 is working, and
    now I m careful for not pull both disks at same time :)

    I wonder if there is any way to see the disk health without going to
    the BIOS ?

    raidctl does not tell anything.
    dmesg and var/adm/messages are quiet when I pull a disk!

    I mean, it sounds dangerous if Solaris does not report anything.. what
    happen if one disk fails and Solaris doesnt report.. and after a while
    the other disk fails too.
    I will have a system with two broken disks.. no pre-warnings!!

    Thank you!