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August 2015

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Sender:
Mailing list for Scientific Linux users worldwide <[log in to unmask]>
Date:
Sun, 30 Aug 2015 00:02:35 -0700
Reply-To:
Brandon Vincent <[log in to unmask]>
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<[log in to unmask]>
Subject:
Re: How do I get flash drive info?
From:
Brandon Vincent <[log in to unmask]>
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To: ToddAndMargo <[log in to unmask]> cc: [log in to unmask], "[log in to unmask]" <[log in to unmask]>
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On Sat, Aug 29, 2015 at 10:18 PM, ToddAndMargo <[log in to unmask]> wrote:
> Rats!

I poked around the kernel source code a bit and confirmed my suspicion
that the kernel/SCSI driver determines if the device is
write-protected by performing a series of tests. These tests basically
involve querying the SCSI mode pages from the device.

You should be able to query the same information in userspace by using
tools bundled in the sg3_utils package.

You might want to try sginfo -a /dev/sdc.

Brandon Vincent

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