I've got a FIrewire 800-based CF gadget, and the SanDisk cards go very fast 
while running "dd" to program them with pfSense. 

The "error", isn't, really.  The CF reports its entire size, but has kept some 
sectors in reserve.  freeBSD attempts to access these during boot, and the 
error results. 

But nothing bad happened. 

Netgate uses Kingston for the 4GB cards, and SanDisk for the 2GB cards. 

-- Jim

On Nov 6, 2012, at 11:30 AM, Jim Pingle <[email protected]> wrote:

> On 11/6/2012 2:24 PM, David Burgess wrote:
>> My CF card is getting to be a few years old now, and I really should
>> have a backup ready to go. I really hate slow IO in any machine, and I
>> don't like long drawn-out firmware updates (especially since I'm usually
>> up at 4 am doing them).
>> 
>> With that in mind, can anybody recommend a CF card with good write speed
>> and good reliability? I'm not interested in paying $100, as this is an
>> itx machine and for that money I could just jump to an SSD. My favourite
>> vendor has a good selection of Kingston, but I really don't like that
>> brand for anything other than RAM.
>> 
>> If anybody knows of something decent under $40, I welcome your
>> recommendation. Thanks.
> 
> I have a Sandisk 200x (30MB/s) 4gb card here that is very speedy.
> However, it has an annoying quirk with the disk layout that makes
> FreeBSD spit an error message on every rw mount. Annoying log spam, but
> it's still speedy. May just be this model, not sure.
> 
> Jim
> 
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