How do I know if TRIM is enabled?

There are two components to TRIM and SoftRAID
Does OSX support TRIM?
Does SoftRAID Pass TRIM on to the drives?

SoftRAID was able to modify system files on 10.6/7/8/9. With 10.10, enabling TRIM caused some security functions to be disabled, which we could not do, so SoftRAID no longer modifies the System itself.

However, with 10.10.5 and later, Apple allowed users to enable TRIM by the TRIMforce command. If you use that to enable TRIM, then the OS will use TRIM and SoftRAID will pass that to the SSD drives.

Sorry this is confusing, but we could not be in a position to open potential security holes in OS X with the SoftRAID application. that is why we stopped modifying the OS X file for TRIM support. However, SoftRAID will support the "official" OS X tweak enabling TRIM.

OK, so I'm using 10.10.5.

What you're saying is if I want to use TRIM, I sould use the TRIMforce command.

Do you happen to know if the 850 Pro TRIM problems were ironed out? I believe my drives have the latest firmware.

According to this post:

https://discussions.apple.com/thread/7257006?start=0&tstart=0

the problem has been solved. I'll await your response before enabling it, though. I feel like a patient who needs a second professional opinion.

The current concern with some SSD's is queued TRIM command, which affects the Samsung drives.

We do not believe this affects OS X. Our understanding is OS X does not support queued TRIM commands.

I believe with the latest firmware this has been resolved, but keep reading journals like Anandtech to keep abreast of news on this.

You should be fine.

(Note: We have seen occasional reports of data corruption that may be related to TRIM. Not all SSD's implement TRIM optimally, and any defect in how TRIM is implemented on an SSD can cause data corruption. Always keep all your data backed up!!!)

I'll do a backup and enable it