I have only read this thread very superficially, but LTO tape (linear tape open)
https://en.wikipedia.org/wiki/Linear_Tape-Open LTO-8 has native raw capacity of about 12TB so attaching a LTO-8 drive may be an option. The same page says, by the way, that LTO-9 is supposed to have 18TB native capacity, but "delayed to late 2021" (which is now). Given the fact that the compressed capacity of LTO-8 is 30TB you are probably still well below the limits of a single LTO8 tape, that is, it is quite possible that if you have less than 30TB of data, you can make a backup to a LTO-8 drive. Regards, David Stes ----- Op 1 dec 2021 om 18:08 schreef Mehmet Erol Sanliturk m.e.sanlit...@gmail.com: > On Wed, Dec 1, 2021 at 2:55 PM Michelle <miche...@msknight.com> wrote: > >> I'm trying to achieve a resilient way of bringing together all my older >> drives for a backup solution using scraps of whatever I can get my >> hands on. >> >> I have closing on 12TB of data so even the 10 won't be enough to back >> everything up, but this is as much for the exercise of doing it, as >> achieving anything solid. It won't be under pressure, but I'd rather >> push the envelope and see what I can do. >> >> So how would the command go? >> >> zpool create tank raidz mirror drive1 drive2 mirror drive3 drive4 >> drive5 >> >> ...which is where I come unstuck with the 2TB drive in the mix. >> >> >> > > > > > A few days ago I lost many weeks of work because my drive #1 / 3 died , not > synchronized into #2 / 3 and #3 / 3 . > This made the computer unbootable . > I replaced the failed disk and synchronized it with #2 . > The disk #3 failed and made the computer unbootable . > I replaced that disk and synchronized it with #2 . > > The #1 disk was new but bought approximately 5 year ago . > > You are saying your disks are older . > > One "safe" but slow choice would be the following . > > Use external USB docks for each of your disks and make their file systems > compatible > with your computer ( if your disks have other file systems ) . > > With your synchronization shell scripts (1) mount (2) rsync (3) un_mount > your drives > by using cron or ( manually which this option is not a good choice ) . > > If any one of your disks fails , it will not affect your computer . > This will be slow but without any other harm . > > > The most suitable additional action may be to backup your data to external > disks > regularly . These disks will not be continuously connected to the computer > and will not be affected by electricity harmful effects . > > > > OR > > You may use another computer ( such as a single board computer ) as an NFS > server > ( or a NAS if one is available to you ) , and use your drives in that > server . > Then synchronize your drives from your computer . If any disk fails , it > only affects the server > but your computer continues to work without affection . > > > > Mehmet Erol Sanliturk > > > > > > > > > > > >> >> On Wed, 2021-12-01 at 11:17 +0000, James wrote: >> > On 01/12/2021 08:31, Michelle wrote: >> > > Say I was to put a 2tb, three 4tb and a 6tb together (a 2 and two 4 >> > > would make 10 and the other 4 and the 6 would also make 10) >> > > >> > > Would that be possible with ZFS now? >> > >> > I think it has always been possible, ask is is sensible? Try it, if >> > you >> > have nothing to loose. The problem is if one drive fails is takes >> > out >> > all of one side of the mirror. >> > >> > Why not use 2 separate 4TB mirrors? 4&4 = 4, 4&6 = 4, total 8. You >> > loose the 2TB drive completely but (guessing) it is the slowest and >> > oldest. You ignore 2TB of the 6. >> > >> > You don't say what you are trying to achieve but it's unlikely you >> > have >> > the full 8TB of data, it is unlikely it can't be split. >> > >> > >> > >> > >> > >> > _______________________________________________ >> > openindiana-discuss mailing list >> > openindiana-discuss@openindiana.org >> > https://openindiana.org/mailman/listinfo/openindiana-discuss >> >> >> _______________________________________________ >> openindiana-discuss mailing list >> openindiana-discuss@openindiana.org >> https://openindiana.org/mailman/listinfo/openindiana-discuss >> > _______________________________________________ > openindiana-discuss mailing list > openindiana-discuss@openindiana.org > https://openindiana.org/mailman/listinfo/openindiana-discuss _______________________________________________ openindiana-discuss mailing list openindiana-discuss@openindiana.org https://openindiana.org/mailman/listinfo/openindiana-discuss