notation for sizes in flash storage; was Memory replacement
peasthope at shaw.ca
peasthope at shaw.ca
Tue Jul 23 22:47:46 EDT 2013
Arnd Bergmannarnd at arndb.de
Tue Mar 15 04:42:04 EDT 2011
> (data from my head, easily off by an order of magnitude):
>
> drive block page erase w-amplftn expected life
> size size size cycles FAT ext3 FAT ext3
> 2005 SLC 256 MB 64 KB 1 KB 100000 2 8 13 TB 3.2 TB
> 2005 MLC 512 MB 128 KB 2 KB 10000 2 16 2.5 TB 640 GB
> 2011 SLC 4 GB 2 MB 8 KB 50000 2 512 100 TB 200 GB
> 2011 MLC 8 GB 4 MB 16 KB 5000 2 1024 20 TB 40 GB
> 2011 TLC 16 GB 4 MB 16 KB 2000 2 1024 16 TB 32 GB
That table will be very helpful when I need to reformat a flash store. Thanks!
According to http://en.wikipedia.org/wiki/Binary_prefix#Flash_drives ,
manufacturers of flash storage devices really do quote capacities in MB,
GB and TB.
Naively, I'd expect page size and block size, to be powers of 2. In the
case of the 512 MB capacity for example, are the block and page sizes
128 and 2 kB or 128 and 2 KiB? Incidentally, the correct abbreviation
for the decimal kilo is k rather than K.
Auxilliary question: is the block referred to in the table the erase block?
Something else?
Thanks, ... Peter E.
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