Recent content by feh

After a little experimenting, I've answered my own question - CF cards are seen as block devices, therefor UBIFS cannot be used on them.

Thanks. I'm also starting to think SLC flash might be the best solution. Does anybody know if UBIFS is a good choice for a file system on a CF card, or should UBIFS only be used on raw MTD devices?

I was under the impression (somebody please tell me if I'm wrong) that the controllers in CF cards do wear leveling. Throw in the option to use a file system specifically designed for the physical medium, such as UBIFS, and I wonder if a CF card couldn't be as reliable as an SSD.

Followup question - can somebody please explain how an SSD is different from a CF card, in that the SSD can be used as a read/write device without fear of wearing out? Thanks.

Well, we'll be producing hundreds/thousands of these devices, so I would need to find a vendor.

I don't know; the only storage interfaces on the board are a CF socket and miniPCI. Cost is a concern also; how much does a 4GB SSD cost?

Don't all CFs made today include wear leveling? Would the proper choice of FS (UBIFS?) alleviate or solve these issues?

Right; my term for "industrial" CF was SLC in my original post. Would that suffice? We have considered doing this, if necessary. However, we'd like to avoid it if at all possible.

Yeah, I wouldn't even attempt swap. Most of the writing would be logging, so, frequent, small writes. At least, I think that's the case; I haven't actually profiled disk usage.

The device has 256MB of RAM. I need probably half of that just for the primary application, so sticking a file system in RAM is not an option. Thanks.

Hi folks. I'm developing an appliance based on a single board computer, that will run linux. The storage medium on the SBC is compact flash. The SBC does not have sufficient memory to keep the file system(s) in memory, so I will need to have a read/write file system on the flash. I've done...