XO-1.5 slow disk writes

John Watlington wad at laptop.org
Tue Nov 17 16:17:03 EST 2009

There is no reason to believe that form factor is the crucial  

I see variation between manufacturers and device class, with little
correlation to size (full size vs. micro).

Your full size Sandisk is likely to be an extreme III (class 6) versus
the class 2 OEM version that we use internally.


On Nov 17, 2009, at 1:02 PM, Daniel Drake wrote:

> On Tue, 2009-11-17 at 18:56 +0100, Sean DALY wrote:
>> as a former audio engineer, I was surprised recently to see a unit
>> like the Samson R16 for sale:
>> http://www.samsontech.com/products/productpage.cfm?prodID=2009
>> which uses an SD Card as its main memory. 8 track linear PCM audio
>> record, 16 track playback.
>> Of course, it's a case of several large files not lots of little
>> ones... but it struck me that there must be some kind of SD r/w
>> optimization in a unit like that.
> Another possibility is that SD cards might generally work a lot better
> than miniSD ones. At least I have a Sandisk SD card here that
> considerably outperforms the Sandisk miniSD card in my XO-1.5.
> Daniel
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