Re: How to add new hard drive to increase disks pace in bsfs?

On 7/20/26 9:17 PM, Tim via users wrote:
> Michael Hennebry wrote:
>>> SO the entire drive cold be rewritten 600 times?
> 
> Mellvie:
>> Yes, that 1,200 TBW on 2 TB drive means the drive can be fully rewritten
>> 600 times in theory.
>>
> 
> That's not actually as good as people might think...
> 
> Put such a drive in a video security system, and the whole drive can be
> filled in a few days if the resolution is high and compression low.  So
> a drive might only last a couple of years.  Again, I consider that a
> very short lifespan.

There is very little benefit to using SSDs in security video storage. 
That's a major use case for spinning disks.

> And what about 600 times to same/similar spots in the drive?  There are
> various applications that do lots of writes.  Web browsing, audio
> editing, logging, compiling...

The drive firmware will remap writes internally so you aren't writing to 
the same place every time.

> Another thing I see rarely mentioned is what about lots of reads to the
> same locations?  How well do drives stand up to that?  And reading is
> something that will always be to the same location, writing is more
> open to writing to different spots each time (i.e. never overwrite, but
> always write anew, and erase the old afterwards, though it is
> deliberately fragmenting data).

Reading has no significant effect and the OS should be caching those 
reads anyway if it's that common.

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