There really aren't any sectors in an SSD. A major error in the hardware may show up as that, since the computer doesn't know it's not really a spinning platter hard disk.
Specifically drives with TRIM command support, which allows the operating system to tell the SSD when data has truly been deleted so the controller inside the SSD can have it back for load-leveling, etc. Built into Windows and Mac, but disabled by default on Mac unless the disk is an specific model number supplied by Apple. Can be turned on for non-Apple drives via command line or simple App. See speed tweaks article below.
The actual internal goofiness inside SSDs is pretty high.
Here's an article about a popular chipset ("sandforce") in 2010. It talks about the "spare area" set aside in the internal memory pool for various tasks. All SSDs set aside some memory for lifespan when other memory locations physically wear out. The disk's own board controller utilizes this area until its gone, then real failures start to happen. Heavy write/delete cycles will speed up an SSDs death, the older the SSD, the less smart the on board controller chipset. The more wear on the memory.
http://www.anandtech.com/show/3690/...andforce-more-capacity-at-no-performance-loss
Lots of stuff going on in there.
Recent work seems to be going toward motherboard chipsets that can truly utilize TRIM on RAID devices, which most don't today. Single drives, it's been working on modern OSs for a while now. Older OSs beat up SSDs.
Also written in 2010, but applicable to older SSDs that weren't yet optimized to act more like hard drives...
http://www.speedguide.net/articles/ssd-speed-tweaks-3319&print=friendly
Lots more out there. Just the tip of the iceberg.