SSD-drives Crucial and Samsung microcode bugs and Linux difficulties

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POSTER: computer news   ||   SSD-DRIVES CRUCIAL AND SAMSUNG MICROCODE BUGS AND LINUX DIFFICULTIES	DATE:2015-06-18
Introduced two weeks ago Debian 8.1 has attracted particular attention : the developers of this free operating system indicated black list of a number of drives by Samsung and Crucial. The reason for this was due to errors in the microcode controller admitted by developers of these drives, incorrect handling of the team took place Queued TRIM (asynchronous TRIM), which led to the removal of the data. The problem affects only the operating system GNU / Linux, because  Windows default QTRIM uses.   For several days, the company Algolia daily updates publication in its official blog, which talks about the experiments with the drives. In particular, it is told that the company suddenly was  faced with problems in the cluster Linux-based systems: ext4 file partitions on the disk subsystems switches  (read only) because of the damage.  First, system administrators have sinned by random failures, but some time after the data recovery failures occurred repeatedly.  A more detailed study of the system logs revealed that the failures are neither accidental nor the result of hardware failure or bugs in the OS and applications, and thus drives used Samsung responded to the asynchronous command TRIM: is not only cleaning the cells of flash memory with irrelevant content, but also the removal of the last 512 bytes of some files. In general, the problem affects the  series of SSD-drives:  - Crucial M500;  - Crucial M550;  (MX100, MX200 and BX100 );  - Samsung MZ7WD480HCGM-00003 (model known as SM843TN);  - Samsung MZ7GE480HMHP-00003 (it PM853T);  - Samsung MZ7GE240HMGR-00003 (it PM853T);  - Samsung SSD 840, 840 EVO, 840 PRO;  - Samsung SSD 850 EVO, 850 PRO. Crucial and Samsung are aware about the existence of the problem, but the patch is not released. Related Products :

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