Is RAID-1 necessary with SSD?

[joeWI]

For many years, I have always mirrored the boot/system/O/S drive to keep the computer running in the event of a hard drive failure.

With the invention of the SSD (solid state drive), does it make sense to use RAID-1 anymore? I mean, what is the likelyhood that a SSD drive will fail in the 5+ year replacement cycle of a typical server or desktop PC?

Thanks for any information that you can provide,
Joe

[XJ.]

Yes, while there cannot be a mechanical failure, the electronics could still go. So if you need the redundancy - then you still need RAID-1.
The probabilistic likelihood of a failure doesn't matter much since that data doesn't indicate which drives will fail; only what % will.

[GrrDonDon]

i would add that simple SSD based on flash with MLC (Multi level cells) definetly is NOT the choice for 5+ years of work. because all of flash based SSD's do wear out, but those with SLC (Single level cells) do it much slower, but they are a bit more expensive.

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