On Mon, 2009-08-24 at 20:08 -0400, Theodore Tso wrote: > > (It's worse with people using Digital SLR's shooting in raw mode, > since it can take upwards of 30 seconds or more to write out a 12-30MB > raw image, and if you eject at the wrong time, you can trash the > contents of the entire CF card; in the worst case, the Flash > Translation Layer data can get corrupted, and the card is completely > ruined; you can't even reformat it at the filesystem level, but have > to get a special Windows program from the CF manufacturer to --maybe-- > reset the FTL layer. This just goes to show why having this "translation layer" done in firmware on the device itself is a _bad_ idea. We're much better off when we have full access to the underlying flash and the OS can actually see what's going on. That way, we can actually debug, fix and recover from such problems. > Early CF cards were especially vulnerable to > this; more recent CF cards are better, but it's a known failure mode > of CF cards.) It's a known failure mode of _everything_ that uses flash to pretend to be a block device. As I see it, there are no SSD devices which don't lose data; there are only SSD devices which haven't lost your data _yet_. There's no fundamental reason why it should be this way; it just is. (I'm kind of hoping that the shiny new expensive ones that everyone's talking about right now, that I shouldn't really be slagging off, are actually OK. But they're still new, and I'm certainly not trusting them with my own data _quite_ yet.) -- dwmw2 -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
