I wasn't seeing data corruption due to Linux but from the cards going completely kaput. No amount of effort seemed to restore them. I was under the impression the eMMC used MLC rather than TLC or MBC? That would imply a different controller and ideally a much longer lifespan.
On Wednesday, May 21, 2014 12:27:28 PM UTC-7, Gerald wrote: > > Reliability at the cell level is the exactly the same. he controller is > exactly the same. > > However, having more unused space enhances the wear leveling where cells > get used less often. > > It does not however prevent issues with data corruption for any Linux > issues. > > Gerald > > > > > > On Wed, May 21, 2014 at 2:21 PM, Willem Buitendyk > <[email protected]<javascript:> > > wrote: > >> I have about 150 beaglebone's running wild over a large geographical >> area, basically all over British Columbia. When I first deployed them last >> year they all started failing within about a month. That amounted to a lot >> of needless driving, hair pulling, forehead banging and just general over >> anxiety - its a wonder I'm still alive. >> >> I eventually ended up using two uSD cards, one with a read only mounted >> filesystem and the other used for writing data (ext4). My beaglebone's are >> paired with a msp430 so I have managed to ensure they also receive a nice, >> clean power down. So far its been about a year and I'd say well over 95% >> are still working fine. However, I recently talked with a tech support >> from an industrial SD card manufacturer and he informed me that SD cards >> that are only ever read to can also fail eventually. He suggested that you >> write a little bit once in a while to activate the wear levelling >> mechanism. As things seem to be working (for now) I haven't drummed up the >> courage to try writing again. >> >> Now we have the beaglebone black with 4G eMMC and I'm wondering just how >> much more reliable eMMC is compared to the stock Kingston 4GB cards in read >> only mode that came with the Beaglebone. I know eMMC is supposed to be >> much improved having an integrated controller but wonder if in a read-only >> scenario it makes any difference? Furthermore, I wonder if others on here >> can offer any experiences or comparisons of eMMC to say SLC memory? >> >> Thanks >> >> -- >> For more options, visit http://beagleboard.org/discuss >> --- >> You received this message because you are subscribed to the Google Groups >> "BeagleBoard" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected] <javascript:>. >> For more options, visit https://groups.google.com/d/optout. >> > > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
