On the Windows 7 page, I have removed “Disable write caching” because this is not necessary. There is an ongoing debate about whether write caching should be enabled or whether it should be disabled. It is probably in your best interest to leave it enabled, so I recommend leaving it on.
Some SSDs do not have a cache. I don’t know what will happen if you leave the write caching enabled if your SSD does not have a cache. Because SSD technology changes so rapidly, it does not seem likely that the SSDs being sold today do not have cache. If you have an SSD that is greater than a year old as of 9/22/2011, you may want to find out from the manufacturer what to do in terms of write caching. If you have purchased an SSD in the last year, you are most likely safe leaving it enabled by default.
The following links debate the topic and have more information about write caching:
http://hardforum.com/showthread.php?t=1482813
http://www.tomshardware.com/forum/254526-32-disabling-disk-write-cache
http://www.sevenforums.com/tutorials/10392-write-caching-enable-disable.html
http://forum.crucial.com/t5/Solid-State-Drives-SSD/Enable-or-disable-write-cache-on-C300-128gb/td-p/33778