[conspire] cd burning giving slight errors

Daniel Gimpelevich daniel at gimpelevich.san-francisco.ca.us
Fri Oct 5 13:43:59 PDT 2012

On Fri, 2012-10-05 at 09:22 -0700, Peter Knaggs wrote:
> I was wondering have you encountered any troubles with
> I/O to flash memory (specifically the 32GB "MicroSDHC" variety from
> SanDisk,
> that comes with a little "adapter sdcard" so that you can plug it in).
> I've found that older varieties (16GB MicroSDHC) cards work
> fine (reading at around 18MB/s according to "dd"), but the newer
> ones give tons of errors during writing, no troubles reading
> (this is with the 3.2.0-29-generic kernel),
> but work fine with writing in Apple OSX 10.6.8  (pretty old at this
> point).
I have seen this too, and it seems to be some bug in the sdhci driver in
certain versions of the kernel, because non-sdhci (i.e. USB-based) card
readers work fine.

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