There's a difference in quality/design between an actual SSD and a USB flash drive. New USB drives can fail very quickly, I've seen it and other users here have had it happen also.
Ok, so flash cards ? there are pci adaptators out there.... But really, I had my usb stick running for 4 years now, and never had a problem till today
Yes, it would be better for your usb to die instead of your pool, but really, the jail is not going to cause any more excessive writes to your pool than copying the files you download to your pool. I find it a little crazy the trouble some people are going through to run a jail from a usb drive to save so few pennies, or whatever. But if it "tickles your elmo"...
It's not to save money.... I just dont know how to make it differently to have my disk proper resting, idling. What you said is not true (imho, i'm just a noob :! ) : just for sabnzb, you'll have a non stop nzb scanning event, and this stops my pool to rest and sleep well.... But I'll make some test : no firefly scanning, no download (I'm not so much a leecher) and testing if my pool is idling...
It's a bit more complicated than that. I suppose you could try snap shotting your flash drive and restore the snapshot if it fails.
???? there is nothing interesting in my jail besides the software, what damage could it be done if my stick die ? I then just have to reinstall on a new stick, right ?
This probably explains the problems you were having with your previous installation in this drive.
Really ? I never had such issue with reboot (with long booting, yes). I'll try another port, or buy a new stick, I'll keep you inform.... But , please, look further on my screen, the both USB stick disconnect, aren't they (da0 is my freenas system, da1 , my jail)