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Operating Systems Linux Red Hat Identify SAN disks not in use

06-01-2011

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As mentioned SAN disks not used by the OS are not seen in the OS. If you ask for the presented disks, those can be checked from the SAN end.

You can check man multipath and /sys/class/fc_host/{hba cards info here} for used disks

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06-02-2011

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asanchez,

Install sg3_utils RPM file, which will give you lot of commands. One special command sg_map will reveal you the mapping details from which you can find whether the disk is used by OS or not.

Other option is not use the utility build my the SAN array companies.In case of EMC it is inq.linux which can be easily downloadble and can be executed.

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