Issue
I have read many discussions about storage, and whether SSDs or classic HDDs are better. I am quite confused. HDDs are still quite preferred, but why?
Which is better for active storage? For example for databases, where the disk is active all the time?
About SSD.
Pros.
- They are quiet.
- Not mechanical.
- Fastest.
Cons.
- More expensive.
Question.
- When the life cycle for one cell of a SSD is used, what happens then? Is the disk reduced by only this cell and works normally?
- What is the best filesystem to write? Is ext4 good because it saves to cells consecutively?
About HDD.
Pros.
Cons.
- In case of mechanical fault, I believe there is usually no way to repair it. (Please confirm.)
- Slowest, although I think HDD speed is usually sufficient for servers.
Is it just about price? Why are HDDs preferred? And are SSDs really useful for servers?
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