Since the firmware is more complicated than hard drives, they are way more likely to brick themselves completely instead of a graceful degradation. Manufacturers can also have nasty firmware bugs like https://www.techpowerup.com/261560/hp-enterprise-ssd-firmwar... . I'd recommend using a mix of SSDs at different lifetimes, and/or different manufacturers, in a RAID configuration.
How different manufacturers deal with running SMART tests under load drastically varies. Samsung tests always take the same amount of time. The length of Intel tests vary depending on load. Micron SMART tests get stuck if they are under constant load. Seagate SMART tests appear to report being at 90% done or complete, but the tests do actually run.
Different SSDs also are more or less tolerant to power changes. Micron SSDs are prone to resetting when a hard disk is inserted in the same backplane power domain, and we have to isolate them accordingly.
Manual overprovisioning is helpful when you aren't able to use TRIM.
What a drive does with secure-erase-enhanced can be different too. Some drives only change the encryption key and then return garbage on read. Some additionally wipe the block mappings so that reads return 0.
It's not as valuable in and of itself as monitoring SMART counters. We've only had a single SSD report failures during a long test, and it also reported an uncorrectable error. However, not finishing the test is a good proxy for if a drive is overloaded and less able to perform routine housekeeping.
Since the firmware is more complicated than hard drives, they are way more likely to brick themselves completely instead of a graceful degradation. Manufacturers can also have nasty firmware bugs like https://www.techpowerup.com/261560/hp-enterprise-ssd-firmwar... . I'd recommend using a mix of SSDs at different lifetimes, and/or different manufacturers, in a RAID configuration.
How different manufacturers deal with running SMART tests under load drastically varies. Samsung tests always take the same amount of time. The length of Intel tests vary depending on load. Micron SMART tests get stuck if they are under constant load. Seagate SMART tests appear to report being at 90% done or complete, but the tests do actually run.
Different SSDs also are more or less tolerant to power changes. Micron SSDs are prone to resetting when a hard disk is inserted in the same backplane power domain, and we have to isolate them accordingly.
Manual overprovisioning is helpful when you aren't able to use TRIM.
What a drive does with secure-erase-enhanced can be different too. Some drives only change the encryption key and then return garbage on read. Some additionally wipe the block mappings so that reads return 0.