MM-5425CN nand SSD

[Erich Jenkins, Fuujin Group Ltd]

Hey! Thanks for the lightning fast follow up. I have a driver from 
OpenSolaris, but I haven't tried to compile it on FreeBSD (if it even 
will with a bit of tweaking is uncertain). I have about 20 of these 
things (factory new actually, no idea where they've been hiding or how 
long...). I'll probably use a PCI-to-SD card for ZIL in this project, 
but if I get the driver from OpenSolaris to work, I'll put it up 
somewhere for others to mess with. Probably not worth writing a driver 
from scratch considering the vintage. And my apologies on the NAND/ECC 
mixup. That should have been obvious to me looking at the Hynix chips on 
  the thing...

Not sure what you mean about the slot though. These were manufactured in 
July of '03, and the datasheet in the packaging specifies PCI-X 
64-bit/66MHz Rev 1.0a, but it is indeed an MMI product.

Thanks for pointing me at the PowerPC port, that should be helpful in a 
few other areas I'm tinkering...

Erich M. Jenkins
Fuujin Group Limited

"You should never, never doubt what no one is sure about."
-- Gene Wilder


Matthew Jacob wrote:
> On 4/20/2010 8:05 PM, Erich Jenkins, Fuujin Group Ltd wrote:
>> Posted this to the SCSI list about a week ago, but with no responses, 
>> I suspect it should have been posted here. Sorry for cross-posting:
> 
> (Hi, Erich!)
> 
>>
>> Not sure if the NAND drivers being written at 
>> http://wiki.freebsd.org/NAND apply to this device or not. It appears 
>> this is more of a simulator at the moment and an experimental 
>> framework. Is there any current support for the MM-5425CN series NAND 
>> flash cards in FreeBSD? These seem like they'd be excellent for a 
>> separate ZIL in a ZFS raidz config if installed in pairs for mirroring...
>>
>> Here's the pciconf probe of the device in question:
>>
>> none3 at 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
>>
>>
>>
> 
> This looks like the old MMI card- not NAND. It's ECC ram with a battery. 
> It won't fit into PCI-X slots- it predates it.
> 
> It has a linux driver for it. DataDomain used it in there 200 series 
> model. NetApp used it a while back too. It has a history going back to 
> SBus PrestoServe.
> 
> I don't believe anyone has ever done a FreeBSD driver. MMI got eaten up 
> by Curtiss Wright a year or so ago. I actually have one, but considering 
> that the connectivity to such a card, no matter how nice, isn't worth 
> it. I don't believe they're being built any more.
> 
> Insofar as NAND drivers, you might check with the PowerPC FreeBSD port 
> people- they've just done a bunch of changes and look like they're 
> supporting some of the embedded stuff, which means they'll have that 
> entire wad of NAND and NOR based device support at their fingers.
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