On Sat, Jun 20, 2015 at 09:36:41AM -0400, Richard Pieri wrote: > On 6/20/2015 9:27 AM, Jerry Feldman wrote: > >At last Wednesday's BLU meeting a discussion was started regarding some > >issues with the Samsung SSD drives and some bugs in their firmware. > >In my case I didn't have my laptop, but I have an Intel SSD not that it > >matters. > > There is a design flaw in the Samsung 840 EVO drives. Only the 840 > EVO drives are affected; the flaw does not affect 840 PRO or any 850 > series or any other vendor's drives. The 19nm NAND chips in 840 EVO > combined with buggy firmware caused the drives to go into error > correcting mode when reading data more than 8 weeks old. Samsung has > since released a firmware update that appears to correct the > problem. This is based on early reports 8 weeks after the firmware > release indicating that the performance degradation is no longer an > issue.
There is a separate issue affecting several Samsung lines and Crucial's MX500 and MX550 lines: the queued-trim system may cause data coruption. Note that queued-trim is a variant on the normal trim support, and is not used at all on Linux kernels before 3.12 or so. http://forums.crucial.com/t5/Crucial-SSDs/M500-M5x0-QUEUED-TRIM-data-corruption-alert-mostly-for-Linux/td-p/151028 https://blog.algolia.com/when-solid-state-drives-are-not-that-solid/ -dsr- _______________________________________________ Discuss mailing list [email protected] http://lists.blu.org/mailman/listinfo/discuss
