SSD Write Endurance 25nm Vs 34nm

[Christopher]

I checked my X25-E drives and all have unsafe shutdowns, looks like 20-30% of the shutdowns are unsafe.

I performed a few tests last night and when Unsafe shutdown increased, the Power Cycle Count did not.
(I had expected Power Cycle Count to increase on every power Off and it didn't)

But at the same time, it seems as though most drives don't act this way... the Intel's power cycle may = 1 power on + 1 ATA shutdown. If the unsafe shutdown increases, power cycle doesn't. Other drives just assume that the drive has to be on to get turned off

So the true number of power cycles for an Intel is Power Cycle Count + Unsafe Shutdown.


I believe that if you enter the bios/uefi then exit, unsafe shutdown count will increase. I enter the BIOS and UEFI all the time, so some drives are worse off than others. For example, I had been reflashing and upgrading the FW on all of my Indilinx drives, so I would remove all of the other drives in the system, as it could take a lot of reboots and UEFI changes and I'd prefer not to have other drives in the system when doing FW updates. I don't think the unsafe shutdown counts are problematic, but it's probably best to avoid them if you can do so without much trouble. Basically, anything other than a soft-shutdown with a modern OS would result in an unsafe shutdown count.

All of the drive failures I've experienced have occurred in Windows, not on a restart. The sample size is pretty small though.