best possible GJOURNAL device?

[Garrett Cooper]

On Thu, Apr 26, 2012 at 10:42 AM, Wojciech Puchar
<wojtek at wojtek.tensor.gdynia.pl> wrote:
>>> http://www.vikingmodular.com/products/arxcis/ddr3/ddr3.html
>>
>> In general devices like these that I've dealt with in the past are
>> presented as SATA or SAS devices, but some devices require additional
>> drivers (take Ramdrives devices for instance).
>
> this one - as described - is 100% regular DDR3 DIMM and plugged as normal
> memory.
>
>> Depends on the BIOS, the settings set in the BIOS, etc.
>>
>>> FreeBSD is but it can be patched easily.
>>
>>
>> I wouldn't depend on volatile memory working in a non-volatile manner
>> unless it's battery backed (which companies like Ramdrive, STEC,
>
> this is supercapacitor backed. after poweroff it have enough time to write
> all to SLC flash chip.
>
>>> How to get DRAM controller mapping i mean what DIMM is at what address?
>>
>>
>> What is located where should be opaque if the designer designed it
>> properly (otherwise a driver will need to be added to interface with
>> the device if the vendor is trying to be clever or is not fully
>> conforming to ATA/SCSI standards).
>
> please read attached link. it is NOT SATA/ATA/SAS/PCIe device.

    I just read the product tearout. It says that it depends purely on
BIOS support, which may or may not exist for your motherboard (and
there's an SSD that it uses to write out the data in the event that
power fails). So I'm guessing that if it works with your motherboard,
it will work regardless of the OS.
    How it's presented to the OS? ENOCLUE (ask Viking).
Thanks,
-Garrett