Re: How to detect a defected disk?

Bence Toth wrote:
>
> Hello,
> We have many disks per system (more than 20). When a disk falls out I should find the defected
> disk. When I run fsck or dmesg (Solaris report utility), they just hang.
>
> Could you describe a method (on UNIX or Oracle level) that I (as non-root, dba) can use to
> identify the defected disk as quick as possible? We have SOLARIS 2.5, but I would thank for a
> general solution useable on other platforms, as well.
>

You could read from the raw device. You will need to be in group "sys" to do this.

#!/usr/local/bin/perl

        # The raw slice to check.
        $disk = "c0d0s0";
        # Where to start reading from.
        $offset = 0;
        # The number of bytes to read.
        $bytes = 512;
        # The buffer to store the bytes read.
        $buffer = "";
 
        if (! open(DD, "/dev/rdsk/$disk")
                || ! sysread(DD, $buffer, $bytes, $offset)) {
            print "$disk isnt responding..\n";
        }
        close(<DD>);

Regards
Peter Marelas

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