I have a LS421DE50E with 2 Toshiba DT01ACA3, 3Tb drives configured in a Raid 1 array. Currently using 850Gb. Raid scanning is run once a month. Running NO servers. Firmware is up to date. The NAS is hardwired to my router and pings wirelessly on average at 4 ms.
If I turn the NAS off and then back on, file access is pretty quick but in about a day or so, just building a directory file list is excruciatingly slow. I just tried to bring up a small txt file and it took about 15 seconds to open and I was already in the directory!
I realize defrag is not an option but anyone have any idea what may be going on?