Re: [dm-devel] RAID4 with no striping mode request

[Wols Lists]

On 15/02/2023 11:44, Roger Heflin wrote:
> WOL: current SSD's are rated for around 1000-2000 writes.  So a 1Tb
> disk can sustain 1000-2000TB of total writes.  And writes to
> filesystem blocks would get re-written more often than data blocks.
>   How well it would work would depend on how often the data is deleted
> and re-written.

When did that guy do that study of SSDs? Basically hammered them to 
death 24/7? I think it took about three years of continuous write/erase 
cycles to destroy them.

Given that most drives are obsolete long before they've had three years 
of writes ... the conclusion was that - for the same write load - 
"modern" (as they were several years ago) SSDs would probably outlast 
mechanical drives for the same workload.

(Cheap SD cards, on the other hand ...)

Cheers,
Wol