20 Mar
2013
20 Mar
'13
2:50 p.m.
On Mar 20, 2013, at 5:28 PM, Jochen Kunz <jkunz at unixag-kl.fh-kl.de> wrote:
On Wed, 20 Mar 2013 13:09:35 -0700 (PDT)
geneb <geneb at deltasoft.com> wrote:
SLC isn't necessarily NOR; there are plenty of NAND
devices that use SLC. Likewise, there are NOR devices
that use MLC (not as common).
You can still buy SLC flash drives, but they're mostly
consigned to the "industrial" space (where people are
apparently more aware of problems caused by data
corruption). They are correspondingly more expensive.
- Dave
Um... I've got both SD cards and thumb drives
that exceed your statement
by *YEARS*.
Thats the point. You talk about old devices. Those are based on SLC
flash. SLC (NOR) flash is OK. E.g. Atmel guarantees a data retention
time of 100 years for the flash in AVR microcontrollers. Currently as
new available SD cards are MLC and increasingly TLC (NAND) flash. MLC is
problematic and TLC even more.