Perhaps a stupid question, but I was wondering if running CM7.1 from an SD card will noticeably drain the battery more than running it from the internal EMMC? Is there any benefit battery wise to running CM7 on EMMC?
Thakns
ididitforthenookie said:
Perhaps a stupid question, but I was wondering if running CM7.1 from an SD card will noticeably drain the battery more than running it from the internal EMMC? Is there any benefit battery wise to running CM7 on EMMC?
Thakns
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SD cards are very low power devices. They only draw power when being read or written to. I do not think you would notice any difference. The internal storage device is also an SD card, just permanently installed (emmc - embedded multi-media card). Besides, you probably would have an SD in the slot anyway. But some say there is a slight speed difference, especially for certain SD cards.
Sent from my Nook Color running ICS and Tapatalk
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Just an off the wall question for everyone. What kind of micro SD card are you guys using? Anyone try a class 10 card versus a class 6 card and notice a different in the Vibrant??
Still using the standard..don't see a point until apps2sd is enabled...at that point ill probably just use the class 6 8gb from my mt3g
Sent from my Samsung Vibrant using XDA App
zenlakin said:
Just an off the wall question for everyone. What kind of micro SD card are you guys using? Anyone try a class 10 card versus a class 6 card and notice a different in the Vibrant??
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It's kinda complicated but here are a few things to note. First most people notice a decrease in speed when going from a 8gig class 6 to a 16gig class 6. This has to deal with the fact phones only regulate a certain amount of voltage to the microsd slot. In order to get more storage into the same amount of space more voltage is needed to keep it running at a class 6 rate of speed. The reason the phone doesn't adjust it's voltage is because it causes more heat (which can of course cause damage to the phone) and it waste more battery.
Second because of this voltage regulation you will never notice the difference between a class 6 and a class 10 card while inserted into the phone unless they figured out how to get class 10 speeds on lower voltage. So this means that you should never read stats presented by the manufacture and actually try to get people who own the card to do a speed test. If we can get every card benchmarked while inserted into a phone then we can have a better understanding of what card is actually faster.
what's the best and most suitable SD card class for running android?
what i understand (and correct me if i'm wrong) higher class cards are faster but take more battery power so causes shorter battery life and heat.
lower class cards on the other hand are slower but consume less energy.
suzaku said:
what's the best and most suitable SD card class for running android?
what i understand (and correct me if i'm wrong) higher class cards are faster but take more battery power so causes shorter battery life and heat.
lower class cards on the other hand are slower but consume less energy.
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It's really all about preference, but I think a class 4 will be more than enough. I've read that class 6 or more is only really needed if you plan on using the card on a camcorder for hd recording, but I just ordered a class 6 16GB myself
Given that the read/write cycles on SD cards are finite, is there an estimated lifespan of a card running CM7?
The Mean Time Between Failures for most SDHC cards is a million hours or 20 thousand insertions.
Having said that, that's just the average of all manufacturers and Your Mileage May Vary
Edit: At the high rate of 15 insertions per day (about average for a CM7 flashoholic); it would take 3 or 4 years to die.
2nd Edit: If you are more interested in write cycles, you are looking at 100,000 or so. You can increase the life by buying good quality and using bigger capacities than you need (fewer erases). I'm not sure if micro SD incorporates load leveling, but that extends the life in full size SD cards.
Read/write cycles are what I am wondering about. I am very new to the android stuff and up until now all I used SD cards for was in cameras and data storage. I assume that running an OS like CM7 off a SD would require lots of read/writes to and from the NC, or I could be wrong on this.
...when you start seeing a lot of FC errors
votinh said:
...when you start seeing a lot of FC errors
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That and/or the reported size starts shrinking. It keeps a "bad sectors" map. Just pray that you don't get a random read error that generates a catastrophic command. You do have sudo rights after all
Honestly, that's the best argument for switching the ROM to emmc yet.
DiDGR8 said:
That and/or the reported size starts shrinking. It keeps a "bad sectors" map. Just pray that you don't get a random read error that generates a catastrophic command. You do have sudo rights after all
Honestly, that's the best argument for switching the ROM to emmc yet.
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The eMMC has similar limitations as the uSD card with regard to read/write cycles.
How much internal memory do yall have with mango for apps pics music etc, and Hows your battery life with mango on your hd2?
it depends on your sd card
if u have 8 gb u have 8gb internal
and battery was good when i used it
with right radio combination, battery life is good...
best is radio combination 2.12/5.51 or 2.15/5.51
I'm planning to add a 64GB or 128GB class 10 sd card to my note 4 and I'm wondering if and how much it will hurt the phone's battery life.
thanks in advance.
apoklyps3 said:
I'm planning to add a 64GB or 128GB class 10 sd card to my note 4 and I'm wondering if and how much it will hurt the phone's battery life.
thanks in advance.
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Hi there,
When adding an SD card, it is indeed another source that needs to be powered. But battery usage of this is neglectable, and you will not see any changes in daily usage.
Gr. OD
OlivierDelvoye said:
Hi there,
When adding an SD card, it is indeed another source that needs to be powered. But battery usage of this is neglectable, and you will not see any changes in daily usage.
Gr. OD
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I wish there were some articles with tests about this...one man's neglectable could be another's extra hour of bettery life
First time you insert it, system will scan and index content. After that don't worry about hurting battery by sdcard