[Dovecot] OT/about SSDs

[Reindl Harald]

and this will hurt all the naive people which start buying large
mid-range SSD storages and wake up from their dreams the hard
way over the long

it will take years until large storages are relieable enough
for critical data if you are not a fortune company with endless
money

a rotating media will never die silently, a f**ing SD-card
in my last phone refused to write any bit on it without any
error message, i formatted it with several filesystems, let
it completly oveeride with dd (/dev/zero and /dev/urandom)
and after put the crap out of the card reader and insert it
again the data where the same as 2 weeks ago

the smartphones card-slot died BTW by overheat of the device
most likely due this bahvior and did i say that dmesg or
/var/log/messages did not contain a single line with a hint
of a probelm due writing over hours on the card

from this day on my opinion is that only a idiot stores critical
data on this new shiny crap - and yes i know there are large
differences between SSD and a SD-card, but that does not change
the fact that such a behavior froma rotating media is impossible

Am 05.05.2013 17:29, schrieb dirk.jahnke-zumbusch at desy.de:
> I found a reference about the robustness of SSDs (and rotating rust)
> on c0t0d0s0.org (http://www.c0t0d0s0.org/archives/7578-Switching-off-SSDs-and-the-consequences.html)
> pointing to this interesting paper:
> 
> http://www.cse.ohio-state.edu/~zhengm/papers/2013_FAST_PowerFaultSSD.pdf
> 
> Just in case you ever wondered what might happen to your SSDs if power fails.
> 
> ----- Ursprüngliche Mail -----
> Von: "Stan Hoeppner" <stan at hardwarefreak.com>
> An: dovecot at dovecot.org
> Gesendet: Sonntag, 5. Mai 2013 12:22:05
> Betreff: Re: [Dovecot] XFS vs EXT4 for mail storage
> 
> On 5/4/2013 10:54 AM, Charles Marcus wrote:
>> On 2013-05-04 11:20 AM, Marc Perkel <marc at perkel.com> wrote:
>>> For what it's worth if you can afford it I'd use SSD drives. My server
>>> screams since I went to SSD.
>>
>> Hi Marc,
>>
>> You have no idea how much I would love to use SSDs for this. But the
>> cost was simply not quite justified.
>>
>> The price keeps coming down on them though - even now, 10 months after
>> buying these servers, the cost would probably be low enough that we may
>> have actually done so, but it was going to be about double the cost of
>> the 15k drives at the time we priced them.
>>
>> Next time, definitely... :)
> 
> The verdict is still out on use of "enterprise" SSDs.  They've simply
> not been in use long enough en mass to know what the common failure
> modes are and what the real lifespan is.  I personally wouldn't yet
> trust long term storage to them, though I have no problem using them for
> fast temporary storage for things like a busy mail queue

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