On Thu, 19 Jan 2012, Singer X.J. Wang wrote:
> That's a deviation of less then 0.5%.. that's not that bad in most
> industries..
>
> S
>
> On Thu, Jan 19, 2012 at 14:48, Robert P. J. Day <[email protected]> wrote:
>
> over the last day on the beagleboard list, there was an animated
> discussion that touched on the fact that some "dd" copies to SD cards
> was failing since the actual capacity of the SD card was noticeably
> less than advertised. as in, trying to write a 4G image to an
> allegedly 4G SD card failed, "no space left on device".
>
> is there a utility in linux that will tell me that *real* capacity
> of an SD card if i pop it into the SD slot? if i write an image to an
> allegedly 8G micro SD card and pop it into my beagleboard, and stop in
> u-boot, what i can do is:
>
> # mmcinfo
> Device: OMAP SD/MMC
> Manufacturer ID: 27
> OEM: 5048
> Name: SD08G
> Tran Speed: 25000000
> Rd Block Len: 512
> SD version 2.0
> High Capacity: Yes
> Capacity: 7969177600 <--- AHA!
> Bus Width: 4-bit
> #
>
> that's *clearly* less than a true 8G. is there a way to see that in
> linux? thanks.
huh? 8G is officially 8589934592. the value above is a full 8%
smaller.
rday
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Robert P. J. Day Ottawa, Ontario, CANADA
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