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charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Am Thu, Feb 20, 2025 at 11:40:48PM +0100 schrieb Frank Steinmetzger: > Another thing to consider: don=E2=80=99t put it into the safe for a year = without=20 > powering it up. As was explained in a previous mail, QLC uses sixteen=20 > different levels of charge inside one single flash cell. The chance of a = bit=20 > flip increases the longer the SSD is powerless and charge slowly (very=20 > slowly) dissipates. It=E2=80=99s hard to find exact numbers, and it=E2=80= =99s more of a=20 > statistical question. Could be a research topic for a slow Sunday. ;-)=20 > Also, don=E2=80=99t you live in a hot area? I knew I=E2=80=99ve seen this data in the past, but couldn=E2=80=99t remebe= r where and in=20 what context. I just stumbled upon the relevant info again. If you search for "jedec temperature and data retention" you find this PDF: https://www.jedec.org/sites/default/files/Alvin_Cox%20%5BCompatibility%20Mo= de%5D_0.pdf It contains establised standard values for flash durability. On slide 28 it= =20 says: Client-class SSDs should retain their data w/o power for 1 year if used 8 hours/day at 40 =C2=B0C and kept at or below 30 =C2=B0C when off. There is also a table for other temperatures; the time is cut in half for 5 degrees more. Mind you, that PDF is 15 years old, TLS had just been released to the publi= c=20 one year earlier according to https://en.wikipedia.org/wiki/Multi-level_cel= l#Triple-level_cell --=20 Gr=C3=BC=C3=9Fe | Greetings | Salut | Qapla=E2=80=99 Please do not share anything from, with or about me on any social network. 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