Just got my N5200 today. Have 5X Seagate Barracuda, ES 24x7, 250GB, 16MB, ST3250620NS running RAID 5 (4 with one hotspare) atm. I'm reading up on RAID 6 and may change to it later after I have checked out all the options and know hows it all works. Running FW 1.00.10
N5200B FW 2.00.08 Modules sysinfo, sysuser, ssh, utils RAID5 with 5x250GB Seagate ST3250620NS SATA-II. RAID5 with a spare. SmartUPS SC420.
Bill - what happens if a HDD in your main N5200 fails? I suppose you have to replace it and the restore from your backup N5200. Or are you somehow running both N5200s side-by-side so that if one fails then the other continues on?
I'm surprised to see several people using RAID5 with a hot spare here. There's no good reason to use that config really, as you've got RAID6 available. RAID5 + 1 hot spare means if you lose a disk, you have a window of vulnerability while the array rebuilds onto the hotspare in the event of a drive failure. RAID6 takes this out of the equation.
Hot spares are great if you have multiple arrays, as you can have 1 spare drive serving several arrays, but for a unit like the Thecus with only a single array, RAID6 is a better option.