Quote:
Originally Posted by bobobo1618
This is pure speculation but going off the presence of the recovery partition, I'm guessing it'll copy that to the system partition and do a quick format of the main data partition (but hopefully leave the partition table (resized partition) intact).
|
In the case of the Glo, that is what happened when I tried a factory reset.
Quote:
Originally Posted by bobobo1618
Speed is mainly an issue with the screen and CPU. The SD card won't be a bottleneck so won't really change anything unless possibly if you have huge books in which case a class 10 should go faster. Also booting up may go faster with a class 10 but I didn't really notice a huge difference.
|
When I was playing with the Glo, I found that selecting a uSD card with better small block writes made a very noticeable improvement in the speed of the device. Small block reads also seem to have a noticeable effect but the small block write speed is the one that varies horribly. I found that the SanDisk Class 4 cards gave me the best results.
Quote:
Originally Posted by bobobo1618
By the way, Class 10 doesn't mean much. It should generally be faster than a lower class card but not in all cases. For example, a really good Class 6 can beat a really bad Class 10 in many areas.
|
Very often the Class 10 cards have done optimization for speed with large data blocks (writing 10MB on my digital camera). They seem to sacrifice small block speeds to obtain the better large block speeds.
Quote:
Originally Posted by bobobo1618
Oh and I'm not sure where the idea that a lower class card should be used for the system card came from. Can you give me a link and/or the reasoning they used? I can't think of any good reason to suggest this.
EDIT: Oh and I didn't mention. I'm using a 16GB Patriot card in mine.
|
I'm one of the people mentioning the lower class cards as being better in some circumstances. This originally came out of a Nook related discussion where some people found their Nook booted from an SD card performed well and others complaining this made their Nook run slower than molasses running uphill in Tuktoyaktuk in January.
I've attached 3 images from various Crystal DiskMark tests I ran on microSD cards (Lexar Class 10, Patriot Class 10 and a SanDisk Class 4 all 8GB) using the internal card reader on my laptop. In my digital and video cameras, the two Class 10 cards worked well. In my Glo, they made it noticeably slower. I suspect this is due to the small block writes where the Class 4 SanDisk was 65 to 171 times faster. The similarity of the sequential read speeds is, I suspect, a limitation of the Ricoh chip used for the card reader.
Regards,
David