At Thu, 7 Apr 2022 09:27:47 -0600 Charles Curley <[email protected]> wrote:
> > On Thu, 07 Apr 2022 05:29:21 -0400 > gene heskett <[email protected]> wrote: > > > Does anyone have any experience at useing more than 1 drive in a > > vtape setup? > > Yes. > > One problem with LVM by itself is that there is no redundancy. Loose a > hard drive, and any volume groups on it or partially on it are likely > toast. For redundancy, you need RAID. Right. LVM is great for breaking up a RAID array into separate file systems, either for VMs or just to segerate types of data (eg system files, user files, a SVN repo, "static" storage (eg ISO image files), etc.). > > I now have three 4TB hard drives in a RAID 5 array. This is purely for > data storage, vtapes among other things. All system and user files are > on a separate SSD. > > It works as follows: > > Three hard drives, each with one partition on it. > > On top of the three partitions, one RAID 5 array. > > On top of the RAID array, encryption. It uses the same passphrase as > the encrypted portions of the SSD, so I need only enter one passphrase > at boot. > > On top of the encrypted array, an LVM volume group, with one volume and > lots of spare room for expansion. > > On top of the logical volume, an ext4 file system. > > Everything works nicely. I've had one hard drive fail. RAID took up the > slack, and was able to chug along nicely for several weeks with only two > hard drives. Once I installed the replacement and added it to the > array, RAID went about propagating data to the new drive with no > complaints or problems. > > I also generate files of sha512sums and sha256sums, which I use to > check the data from time to time. Data integrity seems to be good. > > Vtapes are on the one logical volume that exists. > > Oh, and for the truly paranoid, I have three USB drives which I rotate > to off-site storage and take with me on trips. I use rsync to back up > portions of the logical volume to the off-site backups. > > For more information, > https://charlescurley.com/blog/posts/2019/Nov/02/backups-on-linux/ > -- Robert Heller -- Cell: 413-658-7953 GV: 978-633-5364 Deepwoods Software -- Custom Software Services http://www.deepsoft.com/ -- Linux Administration Services [email protected] -- Webhosting Services
