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Apple Computing Products:
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<blockquote data-quote="Randy B. Singer" data-source="post: 1936784" data-attributes="member: 190607"><p>I don't know that anyone has done a long term study to see which is more reliable as part of an archival strategy. But my guess is that RDHD's would be far superior.</p><p></p><p>I do know that SSDs were not designed to be used for archival storage. Data loss occurs at varying rates and is dependent on a variety of factors. The general consensus online seems to be that data loss from solid state devices is inevitable over time. That time period varies based on whether the SSD is connected to some sort of power source, and the temperature that it is stored at.</p><p></p><p>See the Tom's Hardware forum "Permanence of data storage on Un-powered SSD?" </p><p><a href="https://web.archive.org/web/20200422180343/https://forums.tomshardware.com/threads/permanence-of-data-on-un-powered-ssd.653781/" target="_blank">https://web.archive.org/web/20200422180343/https://forums.tomshardware.com/threads/permanence-of-data-on-un-powered-ssd.653781/</a></p><p></p><p><a href="https://blog.korelogic.com/blog/2015/03/24#ssds-evidence-storage-issues" target="_blank">https://blog.korelogic.com/blog/2015/03/24#ssds-evidence-storage-issues</a></p><p></p><p>For client application SSDs, the powered-off retention period standard is one year while enterprise application SSDs have a powered-off retention period of three months. These retention periods can vary greatly depending on the temperature of the storage area that houses SSDs.</p><p></p><p>In a presentation by Alvin Cox on JEDEC's website titled "JEDEC SSD Specifications Explained", graphs on slide 27 show that for every 5 degrees C (9 degrees F) rise in temperature where the SSD is stored, the retention period is approximately halved. For example, if a client application SSD is stored at 25 degrees C (77 degrees F) it should last about 2 years on the shelf under optimal conditions. If that temperature goes up 5 degrees C, the storage standard drops to 1 year.</p></blockquote><p></p>
[QUOTE="Randy B. Singer, post: 1936784, member: 190607"] I don't know that anyone has done a long term study to see which is more reliable as part of an archival strategy. But my guess is that RDHD's would be far superior. I do know that SSDs were not designed to be used for archival storage. Data loss occurs at varying rates and is dependent on a variety of factors. The general consensus online seems to be that data loss from solid state devices is inevitable over time. That time period varies based on whether the SSD is connected to some sort of power source, and the temperature that it is stored at. See the Tom's Hardware forum "Permanence of data storage on Un-powered SSD?" [URL code="true"]https://web.archive.org/web/20200422180343/https://forums.tomshardware.com/threads/permanence-of-data-on-un-powered-ssd.653781/[/URL] [URL code="true"]https://blog.korelogic.com/blog/2015/03/24#ssds-evidence-storage-issues[/URL] For client application SSDs, the powered-off retention period standard is one year while enterprise application SSDs have a powered-off retention period of three months. These retention periods can vary greatly depending on the temperature of the storage area that houses SSDs. In a presentation by Alvin Cox on JEDEC's website titled "JEDEC SSD Specifications Explained", graphs on slide 27 show that for every 5 degrees C (9 degrees F) rise in temperature where the SSD is stored, the retention period is approximately halved. For example, if a client application SSD is stored at 25 degrees C (77 degrees F) it should last about 2 years on the shelf under optimal conditions. If that temperature goes up 5 degrees C, the storage standard drops to 1 year. [/QUOTE]
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