Date: Thu, 26 Apr 2012 19:42:15 +0200 (CEST) From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl> To: Garrett Cooper <yanegomi@gmail.com> Cc: freebsd-hackers@freebsd.org Subject: Re: best possible GJOURNAL device? Message-ID: <alpine.BSF.2.00.1204261940250.1457@wojtek.tensor.gdynia.pl> In-Reply-To: <CAGH67wSiP_ySU2v3VBzqzaU-D3pMDzZvXa43FP-CFRZboTu=Cg@mail.gmail.com> References: <alpine.BSF.2.00.1204261913320.54086@wojtek.tensor.gdynia.pl> <CAGH67wSiP_ySU2v3VBzqzaU-D3pMDzZvXa43FP-CFRZboTu=Cg@mail.gmail.com>
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>> 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.
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