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Re: usb flash drives / sd




On Fri, Aug 11, 2017 at 02:25:01PM -0500, Doug wrote:
> 
> On 08/11/2017 01:46 PM, jumpy@xxxxxxxxxxxx wrote:
> > There are three major types of flash chip types : SLC - MLC - TLC
> > 
> > how-to check my usbkey/sd/memory card ?
> > 
> > -- 
> > Securely sent with Tutanota.
> 
> I am not being a wiseguy.
> What is the difference, and why does it matter?

The basic difference is the number of bits recorded in a single
cell, and that affects both the storage density and its
long term reliability.

More bits == more dense but less reliable.

To compensate for long term reliability, SSD manufacturers use
a variety of strategies involving staging data in RAM,
compressing it, and implementing other special storage
structures.

On a removable-media flash device, none of those strategies
are used.

-dsr-