First off thanks to all the great folks here, I've finally rooted my rush and excited about getting more apps to my SD card.
On that note, I've seen many sites recommend class 10 SD cards, was wondering what micro SD cards seem to work best for yall out there? Esp, in terms of running apps off of the SD card.
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An SD card's speed is measured by how quickly information can be read from, or written to, the card. In applications that require sustained write throughput, such as video recording, the device might not perform satisfactorily if the SD card's class rating falls below a particular speed. For example, a high-definition camcorder may require a card of not less than Class 6, suffering dropouts or corrupted video if a slower card is used. Digital cameras with slow cards may take a noticeable time after taking a photograph before being ready for the next, while the camera writes the first picture.
A card's speed depends on many factors, including:
The frequency of soft errors that the card's controller must re-try
The fact that, on most cards, writing data requires the controller to read and erase a larger region, then rewrite that entire region with the desired part changed
File fragmentation: where there is not sufficient space for a file to be recorded in a contiguous region, it is split into non-contiguous fragments. This does not cause rotational or head-movement delays as with electromechanical hard drives, but may decrease speed by requiring the controller to do more computation.
With early SD cards the speed was specified as a "times" ("×") rating, which compared the average speed of reading data to that of the original CD-ROM drive. This was superseded by the Speed Class Rating, which guarantees a minimum rate at which data can be written to the card.
The newer families of SD card improve card speed by increasing the bus rate (the frequency of the clock signal that strobes information into and out of the card). Whatever the bus rate, the card can signal to the host that it is "busy" until a read or a write operation is complete. Compliance with a higher speed rating is a guarantee that the card limits its use of the "busy" indication.
Speed Class Rating
32 GB SDHC card
The SD Association defines standard speed classes indicating minimum performance to record video. Both read and write speeds must exceed the specified value. These are defined in terms of suitability for different applications:
Class 2 for SD video recording
Class 4 and 6 for high-definition video (HD) to Full HD video recording,
Class 10 for Full HD video recording and consecutive recording of HD stills
UHS Speed Class 1 for real-time broadcasts and large HD video files
The specification defines these classes in terms of performance curves that translate into the following minimum read-write performance levels on an empty card:
Class Minimum performance
Class 2 2 MB/sec
Class 4 4 MB/sec
Class 6 6 MB/sec
Class 10 10 MB/sec
Speed Classes 2, 4, and 6 assert that the card supports the respective number of megabytes per second as a minimum sustained write speed for a card in a fragmented state. Class 10 asserts that the card supports 10 MB/s as a minimum non-fragmented sequential write speed. By comparison, the older "×" rating measured maximum speed under ideal conditions, and was vague as to whether this was read speed or write speed.
The host device can read a card's speed class, unlike the earlier "×" speed ratings. A device can warn the user if the card reports a speed class that falls below an application's minimum need.
The speed class rating does not totally characterize card performance. Different cards of the same class may vary considerably while meeting class specifications. In addition, speed may vary markedly between writing a large amount of data to a single file (sequential access, as when a digital camera records large photographs or videos) and writing a large number of small files (a random-access use common in smartphones). One study found that, in this random-access use, some Class 2 cards achieved a write speed of 1.38Mbit/s, while all cards tested of Class 6 or greater (and some of lower Classes; lower
Class does not necessarily mean better small-file performance), including those from major manufacturers, were over 100 times slower.
Not sure but I have actually been running a UHS-1 in my Phone since my prevail. It did not seem unstable in that and so far it is fine in my Rush even though I have not rooted and ROMed yet. I do only run a 16GB though because that was safe size for prevail and it was very stable running CTMod. Hoping to have just as much luck and fun with my Rush once I get issues worked out and can get on with rooting and ROMing it.
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Looking for an affordable Android handset on Boost Mobile's network? Mark late September in your calendars, as the Samsung Galaxy Rush is coming with a $149.99 price tag. The device features fair specs, but it won't take you too far.
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