Date: Thu, 22 Apr 2010 22:27:58 -0600 From: "Erich Jenkins, Fuujin Group Ltd" <erich@fuujingroup.com> To: freebsd-drivers@freebsd.org Subject: MM-5425CN battery backed ram disk Message-ID: <4BD121CE.3040804@fuujingroup.com>
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All: I've got several brand new battery-backed RAM cards (pciconf below) and I'd like to use them in a few machines here as a separate ZIL for ZFS file servers, but I'm having some problems with the drivers. I know there is no out-of-the-box support in FreeBSD for them, but I do have a driver that was written for the OpenSolaris project. Anyone interested in helping port that to FreeBSD? I've tried these in OpenSolaris and they perform amazingly well (beat SLC NAND SSD's by nearly an order of magnitude on SATA-2 interface vs the PCI-X/66 interface on these). Since it's ECC-RAM rather than NAND, there's no wear issues which makes them particularly appealing for high-traffic file servers. Card in question: none3@pci0:6:2:0: class=0x058000 card=0x00000000 chip=0x54251332 rev=0x06 hdr=0x00 vendor = 'Micro Memory' device = 'MM-5425CN PCI 64/66 Memory Module with Battery Backup' class = memory I've messed with the driver a bit, but it's a package file, and lacking the source, I'm not sure I have the chops to port it. Anyone interested? -- Erich M. Jenkins Fuujin Group Limited "You should never, never doubt what no one is sure about." -- Gene Wilder
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