other:hardware:ssd
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other:hardware:ssd [2020/01/25 00:19] – created rodolico | other:hardware:ssd [2020/01/25 00:38] – rodolico | ||
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===== Calculate Lifetime ===== | ===== Calculate Lifetime ===== | ||
- | Most vendors beyond the $10 120G specials | + | Most vendors beyond the low end consumer devices |
- | Using smartctl for various Unix systems, you can read the values of most SSD's and calculate | + | Using smartctl for various Unix systems, you can read the values of most SSD's and calculate |
<code bash> | <code bash> | ||
- | apt install smartmontools | + | apt install smartmontools |
+ | pkg install smartmontools # FreeBSD | ||
# record number of Logical Bytes that makes up a sector | # record number of Logical Bytes that makes up a sector | ||
smartctl /dev/sda -a |grep " | smartctl /dev/sda -a |grep " | ||
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Now, multiply the above two values (rightmost column on both). That is the number of bytes written to the SSD since it was manufactured. | Now, multiply the above two values (rightmost column on both). That is the number of bytes written to the SSD since it was manufactured. | ||
+ | |||
+ | Nothing I'm aware of has less than a 10 TBW, and most high end consumer grade SSD's are rated at many times that. For example, a Samsung 850 Pro SATA 250G SSD is rated at 70 TBW, but tests show it can get up to 150 TBW. | ||
+ | |||
+ | Note that, using the same technology, a larger capacity will have a linearly greater TBW value. The TBW value is based on between 3000 and 100,000 writes per cell depending on the technology. If you have a larger capacity drive, it has more cells, so it would have more TBW. | ||
You can find the make/model of the drive with the following two commands: | You can find the make/model of the drive with the following two commands: | ||
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NOTE: some vendors do not include ID 241 in their output, so all you can do is guess. One good thing to try is simply take the output of smartctl -a and pipe it to less, then read through it (not that big). | NOTE: some vendors do not include ID 241 in their output, so all you can do is guess. One good thing to try is simply take the output of smartctl -a and pipe it to less, then read through it (not that big). | ||
+ | |||
+ | ===== Links ===== | ||
+ | * https:// | ||
+ | |||
+ | |||
other/hardware/ssd.txt · Last modified: 2020/01/25 21:06 by rodolico