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JJJJooohhn
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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

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2 Replies

Re: RAID-1 on Dell PE 2850

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

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JJJJooohhn
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Re: RAID-1 on Dell PE 2850

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 Smiley Happy

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!

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