Use USB3, UASP, or esata for better performance over just USB, especially for spinning rust. It might be preferred to get two or more desktop drives, and a hard drive "toaster" (They come in 1, 2, and 4 slice varieties) to pop them into to simplify changing the drives around on the weekly. Also make sure before or after you swap the disks you force a level 0 for each DLE on the backup.
On Thu, Jul 14, 2016 at 7:40 PM, Jon LaBadie <j...@jgcomp.com> wrote: > On Thu, Jul 14, 2016 at 07:12:38PM +0200, Stefan G. Weichinger wrote: >> Am 2016-07-13 um 22:19 schrieb Jon LaBadie: >> >> > I've not used it on Linux, but an Overlay FS (OFS) was introduced >> > in the kernel about 2 years ago. With that, your two drives >> > could have their own fixed mount points. Then their root dirs >> > could be overlayed so both trees appear under a single directory. >> > If one drive was not there, only half the vtapes would appear. >> >> I have to research if it is possible to have both layers writeable. >> >> I like the udev-rules-way better. >> Have the 2 disks in fstab: >> > Ahh, I finally remembered how I did it when I had vtapes on > 2 external usb disks plus part of one internal hd (not the > holding disk drive). > > Each was mounted wherever, but in the same place each time. > What amanda used was a single "changer" dir of "slots" that > were symbolic links to the vtape in that slot on its > corresponding disk. This too did not change. > > I think I had about 80 slots (and vtapes), 30 ea on usb and > 20 on hd. It did not have to be, but the slot numbering > also matched my vtape numbering. If a usb drive was not > mounted it just seemed to amanda that the slots were empty. > > If the usb drive were mounted, but went to sleep due to > inactivity, I was pleasently surprised that nothing bad > happened. What ever call woke up the disk held and waited > for the disk to be available, about 10-15 sec. > > Jon > -- > Jon H. LaBadie j...@jgcomp.com > 11226 South Shore Rd. (703) 787-0688 (H) > Reston, VA 20190 (703) 935-6720 (C)
