[ZFS] Using SSD with partitions

[Julian Elischer]

On 10/16/11 11:40 AM, Luchesar V. ILIEV wrote:
>
> That's true, but my understanding is that the differences go further
> beyond that. To quote one paper: "Our data show that flash memory’s
> behavior under power failure is surprising in several ways. First,
> operations that come closer to completion do not necessarily exhibit
> fewer bit errors. Second, power failure not only results in failure of
> the operation in progress, it can also corrupt data already present in
> the flash device. Third, power failure can negatively impact the
> integrity of future data written to the device."


However one must not confuse Flash memeory with drives using flash memory.
part of the added value brought to the tabel by SSD manufacturers is  
(SHOULD BE)
the addition of mechanisms to cope with unexpected power down. whether 
it be
hold-up caoacitors, battery backed up ram or any other mechanism they 
can think of.

Certainly Fusion-IO Flash cards will never lose data that they have
reported as having been written.

> http://cseweb.ucsd.edu/users/swanson/papers/DAC2011PowerCut.pdf
>
> However, that's probably getting too academic (also beyond my own
> qualifications), and I wouldn't like to hijack the thread.
>
> Cheers,
> Luchesar
> _______________________________________________
> freebsd-fs at freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-fs
> To unsubscribe, send any mail to "freebsd-fs-unsubscribe at freebsd.org"
>
>