Date: Thu, 14 May 2015 23:07:31 +0100
From: One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>
To: Larry Finger <Larry.Finger@lwfinger.net>
Cc: "linux-mmc@vger.kernel.org" <linux-mmc@vger.kernel.org>,
        LKML <linux-kernel@vger.kernel.org>
Subject: Re: Help with writing to micro SD card
Message-ID: <20150514230731.6f063685@lxorguk.ukuu.org.uk>
In-Reply-To: <5554FF76.2010206@lwfinger.net>
References: <5554FF76.2010206@lwfinger.net>
Organization: Intel Corporation
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> When I received the tablet, I used dd to back up the internal card. When I used 
> a block size of 4M in that operation, it also froze; however, the standard block 
> size (512) worked. That suggests that the standard Linux r/w operations on the 
> device are too fast.

Unlikely.

> What should I do to get some debug information?

As its Baytrail-T make sure you have

- Current BIOS
- Latest kernel

If it persists try disabling power management on the SD card interface.
It may be worth reading through the ASUS T100TA bug reports and
workarounds as that is probably the most poked at platform for BYT/T


Alan
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