Effect of partitioning on wear-leveling

[Warner Losh]

On Tue, Mar 22, 2016 at 9:49 PM, Brett Glass <brett at lariat.net> wrote:

> At 09:34 PM 3/21/2016, bob prohaska wrote:
>
> How do modern flash devices report end of life? Do problems show up in
>> error
>> logs, or does the device simply refuse to work with no warning?
>>
>
> Depends upon the device. SSDs will give you a warning via SMART; they will
> begin to retire blocks and swap in reserved blocks. Simpler devices such
> as memory
> cards and USB sticks will simply die. I use SSDs in mission-critical
> applications,
> so that I have at least a fighting chance of replacing them before there's
> an outage.


Hope your SSDs are better at reporting things than ours. We've seen some
SSDs
just fail even though the previous SMART data said we've used maybe 20% of
the
drive's write ability....

Warner