wad at laptop.org
Thu Mar 10 19:18:48 EST 2011
On Mar 9, 2011, at 2:23 PM, Arnd Bergmann wrote:
> On Wednesday 09 March 2011 17:31:24 Kevin Gordon wrote:
>> go, no-go, spend the extra pennies and get a Class 4/6/8/10
> Note that Class 8 does not exist (except fakes) and class 10 is
> usually not faster than class 6 if you run ext3 on it.
> Also, a Sandisk card is usually faster than a card from
> most other manufacturers even if they are one class faster
I'll call BS on that claim. Sandisk cards are all over the map,
depending on the controller used internally. Please understand
that these manufacturers change controllers all the time --- tests
results from nine months ago are invalid.
> See https://wiki.linaro.org/WorkingGroups/KernelConsolidation/Projects/FlashCardSurvey
> for a list of many cards. Go for a brand that has a larger
> number of open segments. Also make sure that the partition
> is aligned to 4 MB, otherwise you waste half the performance
> and expected life.
We align our images to 8 MB boundaries, as 4MB isn't enough
for some cards.
Since fs-update installs the partition table as well as the partition
images, this happens automatically.
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