Several times I've heard opinions that many mass-market SSDs and HDDs don't provide sufficient durability guarantees and Linux can do nothing with that. Namely, after an fsync() call recently modified data can still sit in the drive's volatile write cache and, thus, it may be lost in case of a power failure. If you want any meaningful durability, you should go for enterprise-grade drives that have a battery/capacitor so that they can flush the data to persistent storage on power loss. Is it real...