Lost another SSD over the weekend. Crucial m4 512GB. Lost detection of the drive by the computer (Win 7 desktop), plugged it in through a USB adaptor and it's still not detected (Windows and Mac). That's 3 in the last 18 months.
Muskin Chronos 120GB (Windows 7 laptop)
Crucial m4 512GB (MacBook Pro 2012)
Crucial m4 512GB (Windows 7 desktop)
That being said I run everything on SSD: 2 HTPC, 2 desktops, 2 MacBooks, 2 Windows laptop.
I can't find the common factor that causes the failures. It would just be working one day, then next day fail detection by the computer and it's all gone.
How do you turn off your computers? And do your storage drivers put the drive into low power mode prior to turn off?
The thing with SSDs (and you don't appear to use the OEM ones like Samsung, Intel or Toshiba) is power failure can be deadly. Modern SSDs are fast and because SATA3 is a bottleneck, many sacrifice speed for data protection (if you can do 1GB/sec, and SATA3 is limited to 540MB/sec, you can sacrifice 40% of the speed in the name of data safety).
SSDs require a bunch of tables to work - the tables manage the flash translation layer software (the software that maps physical flash blocks to what the drive exposes, including wear levelling, TRIM and other features). In data safe SSDs, those flash tables are usually write-through cached so updates are committed to media, and so media always contains a consistent table. (There are tricks done to ensure that even if the table is partially written, there's a recovery table which is an older version. Think of it like a journaling file system).
Older SSDs cached the tables in RAM, wrote to them in RAM, then relied on a bank of capacitors to let them flush the tables from RAM to media on power loss.
Some SSDs cache them into RAM, and don't handle power failure, which can result in failures if the tables are corrupted.
The GOOD news is there's often a way to recover them - if you do an ATA_SECURE_ERASE command, it forces the SSD to reset the tables to a blank state and will often get them completely operational again, albeit losing all your data.