SUMMARY: RAID disk check

From: jgrijalba <jgrijalba_at_novasoft.es>
Date: Tue, 10 Jul 2001 09:49:57 +0200

Hi gurus,

        Original question:

        How to check a RAID disks looking for errors.


        Answers:

        Thanks to Alan, John Tan, Kjell Andresen and Thomas Blinn for their
answers.

        I choose the answers from Thomas Blinn and Alan:

        Thomas :

        "Read the RAID controller documentation. With most RAID controllers, the
host system (e.g., Tru64 UNIX) can NOT see the "real" disks and never is
informed of most disk errors; you have to ask the RAID controller, and
the details of how to do that vary"

        Alan :

" Some RAID systems may include their own software, so check
        the subsystem documentation. If the RAID pretends to present
        SCSI disks back to the system you can use scu(8) to run a
        verify on the device. Read the help for the particular
        command carefully. One of the scu(8) scanning commands
        does a write followed by read, while the other just reads.
        Using the wrong one, will overwrite all the data on the
        disk. For non-SCSI disks, you can use the dd(1) on the
        C partition of the disk. If the RAID has regenerate any
        data, you'll have to consult the subsystem's documentation
        to see if logs that somewhere."


Regards,

        Jorge Grijalba
Received on Tue Jul 10 2001 - 07:44:43 NZST