SSD is not protected against energy supply failures

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POSTER: computer news   ||   SSD IS NOT PROTECTED AGAINST ENERGY SUPPLY FAILURES	DATE:2013-03-04
SSDs are usually based on non-volatile memory chips, so a power failure in your device data must be maintained.  But researchers from Ohio State University and HP Labs found that a power failure can lead not only to a loss of information stored in the SSD, but the failure of the drive. In the experiment, the researchers tested the strength of 15 SSDs from five different manufacturers and two hard drives.  All considered SSD based on SLC or MLC memory and were produced in the period 2009 to 2012.  SSD price ranged from $ 0.63 to $ 6.50 per gigabyte, and four subjects was declared protected against power failure in the power supply voltage. Only two solid-state drive passed test, the remaining 13 were damaged to varying degrees of severity. The most common error was the Unserializable Writes (out of sequence records) - eight drives: Three times the error occurred Bit Corruption ... And ... Shorn Writes: One of the tested SSD after eight power outages lost almost a third of its capacity, or 72 GB of data.  Another, after 136 trips, out of order and no longer determined by SAS controller . In conclusion, the researchers note that SSDs offer better performance than traditional hard drives, but can not guarantee the security of data, even with simple power down.  Also, be aware that in the event of physical damage to the controller or SSD memory chips, the process of recovering data from the defective unit is virtually impossible.  Overall, the report raises questions about the feasibility of storing important information on SSD. Related Products :

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