Fwd: XO-1.5 slow disk writes
tiagomnm at gmail.com
Tue Nov 17 15:24:02 EST 2009
On Tue, Nov 17, 2009 at 6:05 PM, Peter Robinson <pbrobinson at gmail.com> wrote:
> On Tue, Nov 17, 2009 at 6:02 PM, Daniel Drake <dsd at laptop.org> 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:
>>> 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.
> Yes, that's quite possible as well. There's all sorts of different
> speeds for the cards. I've never really seen a fast mini or micro SD
And I've also never seen an SD one. Even USB drives share the same
problem and some SSDs.
If you manage to find SD cards with a proper FTL with some cache, I
doubt it will be cheap. Perhaps some caching done in RAM to coalesce
writes where possible? A guy has implemented that for windows but I
can't seem to find the link.
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