Is it true that HDDs are more reliable than SSDs?

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Vitaly2017-01-17 22:45:13

Iron

Vitaly, 2017-01-17 22:45:13

Is it true that HDDs are more reliable than SSDs?
What is the number of cycles for both?

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5 answer(s)

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Andrew, 2017-01-17
@byte916

The main drawback in the reliability of SSDs compared to HDDs is that if hdds die slowly in 94% of cases, and allow you to save most of the information, and those that died suddenly allow you to restore all (or almost all) information, then SSDs almost always die immediately and to the ends, without a chance to recover the information.
On the other hand, in laptops, the hdd will die faster (compared to a desktop) due to the portability of the laptop. There will be no difference when using an SSD (apart from the increase in speed and reduction in power consumption)
We have already said about the number of rewriting cycles, but I want to note that it is not so easy to practically achieve this limit - at 3000 cycles, even if you rewrite the entire ssd disk ten times a day, it will last for almost a year. But in general, with normal use of the resource, at least five years is enough. If the disk fails due to marriage, then your computer will become obsolete faster than you reach the limit. The main thing is to follow some rules (for example, do not fill the ssd by more than 80-85%)

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OnYourLips, 2017-01-17
@OnYourLips

For home use, SSD is more reliable from a mechanical point of view.
And there will be enough rewrite cycles with a large margin.

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iBird Rose, 2017-01-17
@iiiBird

Is it true that HDDs are more reliable than SSDs?

controversial issue. depending on how to use.
for SSD:
https://ru.wikipedia.org/wiki/%D0%A2%D0%B2%D0%B5%D...
The main disadvantage of NAND SSD is a limited number of rewrite cycles. Conventional (MLC, Multi-level cell, multi-level memory cells) flash memory allows you to write data about 3000-10000 times (guaranteed resource); the cheapest drives (USB, SD, uSD) can use even denser TLC-type memory (MLC-3) with a resource of the order of a few thousand cycles or less.
HDD has no limit in overwriting cycles. they die due to internal physical damage during operation.

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other_letter, 2017-01-18
@other_letter

Pan overlooks the fact that after reaching this very overwriting limit, the SSD does not die. It's just that nothing more can be written to these blocks, and information is not lost. These blocks simply go into read-only mode.
Pluses of SSD - speed, silence, unpretentiousness to shaking, energy efficiency. The rest seems to be cons.

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Artem @Jump, 2017-01-18
Tag

Reliability in general cases is almost the same.
Both are complex devices, there are marriages, they break down over time, wear out from intensive work.
In servers under high load, they change in batches - both HDD and SSD. The mechanics fail, the overwriting cycles are exhausted. Under some types of load, SSDs fly out faster. But this is only on loaded servers.
At home - shaking that HDD or SSD is almost impossible - there are no such loads.
But the SSD is not afraid of shocks, shocks, it heats up less - therefore, in home use it is more reliable than the HDD.
If you buy an SSD for home, then forget about all sorts of cycles and other fairy tales. It will become morally obsolete or burn out from a power surge along with other iron much faster than it will run out of cycles.