[pve-devel] ceph firefly in pve repos

[Stefan Priebe - Profihost AG]

Am 11.09.2014 um 14:36 schrieb Dietmar Maurer:
>>>> Intel S3700 do not ignore the command but they have a capicitor.
>>>
>>> I am unable to understand that :-/
>>
>> Some SSDs regardless if they have or don't have a capicitor ignore the FLUSH
>> commands and other do not. This depends on the SSD itself not on the
>> manufactor.
> 
> Hi Stefan, thank for your patience! But I just wanted to express that I do not understand
> why a hardware vendor implement such nonsense. Ignoring flush is extremely dangerous,
> and doing flush while you have a capacitor is not required.
> 
> Or maybe I just miss-understood why those SSD have a capacitor? 

Just my personal opinion. Currently no vendor or up2date ssd ignores
flush anymore. Even those with capicitor. This matches the specs. In the
past Intel had just ignored them.

Stefan