Firstly, I must apologise for the quality of the images, I snapped them on my iPhone.
A disk has two states, Waiting To Fail or Failed…
I keep my data on separate NAS devices, all of which are backed up.
For Documents, Spreadsheets, Accounting data etc. I use a Buffalo Tera Station. 4 disk volumes in a RAID5 configuration.
I perform the following backups every night.
Onto a USB disk (USB1) – I perform a FULL backup, i.e. backup EVERYTHING.
Onto a USB disk (USB2) – I perform a DIFFERENTIAL backup, i.e. ANYTHING that has changed since the last DIFFERENTIAL.
I have a UPS (Uninterruptable Power Supply) that invokes a graceful shutdown of the NAS device in the event of a power failure.
Sat on top of that I have an LG NAS device configured as RAID1. On this I keep video source files from my DSLR and Panasonic FZ38. It also has a built in Blu-Ray burner for archiving / backup purposes.
I have another NAS device, a LinkStation, which I use for storing my image data.
I have two USB devices connected to that. USB1 backups up my personal images, USB2 backs up files for:
Storm Imaging Photography
For commercial shoots (Weddings and Portraits) I always back up the data to DVD, I make 2 copies, one copy I keep in a container in my loft, the other is stored in an off site location.
Information about RAID configurations…
Once again, sorry for the quality of the images….
Update – the primary NAS has failed and I cannot see the backup devices. Currently all my image data is inaccessible!
I can get the device into EM mode and can ping the default IP of 192.168.11.150 however the Flash Updater cannot see the device, which is currently a brick.