On 17/12/2020 01:47, bob prohaska wrote:
> As evolution plays out it may well favor SSD.

That's done and dusted,

> For now HDDs seem to
> be developing the same handicaps as SSDs. I think HDDs still win
> on write cycles and power consumption. Not sure how they compare for
> practical life span. Life span is a function of overprovisioning for
> SSD, if SSD costs keep dropping they might win on both counts.
> Last I checked SSDs were a little worse for power consumption, but
> that was months ago and I don't know where the trend is going.

The problem I see ahead for SSDs is the move to QLC (4 bits per cell),
at the cheaper end, which has an order of magnitude less life than TLC
(3 bits per cell).

Although this was said for the move from SLC (1 bit per cell) and MLC (2
bits per cell) to TLC, but that has provided pretty rock solid over the
last 6 or 7 years, with the use of advanced controllers, wear levelling
an over provisioning.

---druck

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