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From: GN Keshava <keshava.gn@gmail.com>
Date: Thu, 25 May 2017 05:59:14 +0000
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Subject: Unmount and mount a mass storage from shell
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How can I unmount and mount a mass storage fs from UEFI shell?

In older EFI shells, I can do with "mount" command. But it just does
"mapping" in newer shell. It doesn't actually remounting the device.

Please help.

thanks