TWO HOURS?? Across SATA drives at 5gb per minute? Incremental or Replace Changed? Crikey! What are you backing up?
I don't think it's the SATA (or USB) speed that's the issue. It's the time the hard drives take to read the stuff and write it. I don't back up in one big lump, but the whole lot, weekly, file-by-file (automated) so that I can go straight to the missing one if I need it.
There are five backup drives, and it cycles round them.
The backup routines look like this (with more lines):
robocopy D:\ A:\NineBU%date:~6,4%%date:~3,2%%date:~0,2%\D\ *.* /s /r:0 /copyall /A-:SH
Here's a SATA-to-SATA log to the slower SATA drive:
Started Full backup to A 12/04/2015 4:00:00.63
- C complete 12/04/2015 5:03:35.31
- D complete 12/04/2015 5:43:30.23
- E complete 12/04/2015 6:09:24.95
- F complete 12/04/2015 6:15:09.06
- G complete 12/04/2015 7:52:35.79
- H complete 12/04/2015 8:13:14.36
- I complete 12/04/2015 8:43:59.82
Finished Full backup to A 12/04/2015 8:43:59.89
SATA-to-USB takes a tad longer:
Started Full backup to R 24/05/2015 4:00:00.22
...
Finished Full backup to R 24/05/2015 15:40:01.27
C backup is only the "User" folder. I back that up because some software still sneaks stuff into there when I'm not looking. It also picks up "My Documents" which are in various other places - I should probably tweak the symlink settings in the backup control file to stop it doing that, but can't be bothered.
D is data - mostly Word and Excel, but a good range of other.
E is photographs - lots of those.
F is church stuff - faculties, website stuff, service books, and allsorts.
G is mostly music - lots of that.
H is odds & ends of all sorts.
I is internetty stuff, e-mails, downloads over the past few years, etc.
Each backup is a whisker over 300GB.