Said by: on the routerboards, they use a NAND type memory, as do modern USB and CF cards. MTBF is, therefore, going to be approximately the same for all 3 types.

IIRC, the expectation is around 100k write cycles.I wanted to clarify that exact same model '100K write cycle' flash device can become totally unwritable after just a few days if OS does not implement 'wear leveling' algorithm. Even with 'wear leveling'. The implementation varies between OS/filesystems and users write different amount of data per day.

Days until drive becomes 'unwritable' = (datasheet write cycles) x (file system overhead) x [ (total bytes in drive) / (average bytes written per day) ] Moral: don't go crazy writing traffic logs onto a flash drive! Butch, could you kindly check what kind of 'wear leveling' algorithm is supported in new versions of Mikrotik RouterOS? Also what is their 'file system overhead ' it will be a fraction like 0.7 for a DOS/FAT system. For USB Flash drives, Toshiba calculated that a 10,000 write cycle endurance would enable customers to “completely write and erase the entire contents once per day for 27 years, well beyond the life of the hardware.”You can see that Toshiba simply calculated (10,000 erase cycles / 365 days = 27 years ) which implies re-writing 1GB/day to a 1GB drive. This is OK for digital cameras and USB mass storage.

How to Install Mikrotik RouterOS on PC If you buy Mikrotik RouterBoard usually can be used directly without the need to install RouterOS. Live Interior 3d Serial Number.

But imagine an embedded system is updating temp files and log files many times per second effectively re-writing 1TB/day to a 1GB drive. That will make a 10,000 cycle device un-writable after less than 10 days using the proper formula. Which BTW applies to all flash drives out there. Said by: Butch, could you kindly check what kind of 'wear leveling' algorithm is supported in new versions of Mikrotik RouterOS?

Also what is their 'file system overhead ' it will be a fraction like 0.7 for a DOS/FAT system. As sibisties said, this is in the firmware for the flash card/chip. I agree with your assessment mathematically, but in practice, it doesn't seem to work that way.

That 100k write cycles may be old news, too. I am remembering from a long time ago and just went to check my main information source (google) and that number still exists. As I said, though, in practice, I have not seen an issue with write cycles. Said by: I agree with your assessment mathematically, but in practice, it doesn't seem to work that way.I agree that datasheet cycles are improving and quality device makers tend to be pessimistic, but the expected lifetime still follows that equation. We can simplify using 1.0 (zero overhead) for RouterOS filesystem.

So [ Expected lifetime ] = [ Datasheet cycles ] x [ Flash Size ] / [ [Average Writes per Day] You could prove the equation in less than a month by setting up an extreme MT configuration which echoes/logs everything imaginable to create ~32GB writes per day to a 32MB CF card. Said by: I agree with your assessment mathematically, but in practice, it doesn't seem to work that way.I agree that datasheet cycles are improving and quality device makers tend to be pessimistic, but the expected lifetime still follows that equation. We can simplify using 1.0 (zero overhead) for RouterOS filesystem. So [ Expected lifetime ] = [ Datasheet cycles ] x [ Flash Size ] / [ [Average Writes per Day] You could prove the equation in less than a month by setting up an extreme MT configuration which echoes/logs everything imaginable to create ~32GB writes per day to a 32MB CF card.