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> On Dec 14, 2023, at 4:09 AM, David Christensen <dpchr...@holgerdanske.com> > wrote: > > On 12/13/23 08:51, Pocket wrote: >> I gave up using raid many years ago and I used the extra drives as backups. >> Wrote a script to rsync /home to the backup drives. > > > While external HDD enclosures can work, my favorite is mobile racks: > > https://www.startech.com/en-us/hdd/drw150satbk > > https://www.startech.com/en-us/hdd/hsb220sat25b > > https://www.startech.com/en-us/hdd/s25slotr > Those don’t seem to fit my raspberry pi’s > >> On 12/13/23 10:42, Pocket wrote: >> Many reasons........ >> No real benefit (companies excepted), and issues like you have been posting. > > > I went many years without failing data HDD's, then several data drives > started dying over the course of several months. The disks were in software > RAID. I told the RAID to drop the failing disk, operated in a degraded > condition until I was ready to do the work, shutdown when I wanted, removed > the bad disk, installed a replacement disk, booted, told the RAID to add the > replacement disk, and watched the disk resilver. I suffered zero unplanned > down time. I suffered zero data damage or loss. I was lucky that only one > disk failed at a time. RAID was a huge benefit to me. > > > People can have issues with RAID, just like anything else. With the > exception of the failed HDD's above, the root cause of my RAID issues was > PEBKAC. The solution was, and remains to be, learning. Thankfully, there is > Michael W. Lucas: > > https://mwl.io/nonfiction/os > > >> If the RAID controller bites the bullet you are usually toast unless you >> have another RAID controller (same manufacturer and type) as a spare. >> I have zero luck replacing one companies raid controller with another >> and ditto on raid built into the motherboard. > > > I agree that hardware RAID solutions require identical hardware spares. That > is a price you must pay if you care about the data supervised by that > controller. > > >> I really don't need any help losing my data/files as I do a good job of that >> all by myself ;) > > > RAID is not designed to protect against user filesystem manipulation errors. > Backups are. > > > zfs-auto-snapsnot(8) makes snapshots a no-brainer and recovery self-serve. I prefer rsync backups > > >> I found it is better to just have my data on several backup disks, that way >> if one fails I get another disk and copy all the data to >> the newly purchased disk. > > > How many backups do you keep on each of your several backup disks? Enough that I don’t lose data > > > Do you use the rsync(1) option "--link-dest=DIR" to do file-level > deduplication? > > > ZFS with block-level compression and deduplication is a no-brainer: > > https://lists.debian.org/debian-user/2023/03/msg00116.html No need for compression > > > Another benefit of ZFS snapshots is that they are are atomic. (Yet another > is that they are taken quickly.) So long as your app or service has its > files in a consistent state (ideally, closed), restoring from the snapshot > should produce a set of files that work correctly. > > Radioactive I see >> After removing raid, I completely redesigned my network to be more inline >> with the howtos and other information. > > > Please elaborate regarding "redesigned my network" with respect to not > needing RAID. > > Gave me the impetus fix see the errors of my ways >> I have little to nothing on the client system I use daily, >> everything is on networks systems and they have certain things they >> do. > > > Please elaborate regarding "the certain things they do" with respect to not > needing RAID. > > >> I have a "git" server that has all my setup/custom/building scripts and all >> my programming and solidworks projects. > > > I assume your git(1) server has a repository and it is on a single disk with > rsync(1) backups. If the repository disk crashes, you replace it with > another disk, and you restore from backup, what happens to clients who > checked out projects after the backup? To clients that checked in changed > projects after the backup? Is recovery less work that replacing a bad disk > in RAID? > You assume wrong > >> I have DELPHI build apps going back to about 1995. > > > Do you mean: > > https://www.embarcadero.com/products/delphi Nope Borland > > >> It all backed up to a backup server(master and slave) and also a 4TB offline >> external hard drive. I have not "lost" any information since. > > > Please elaborate "master and slave" with respect to not needing RAID. > Same as DNS > >> I also found that DHCP and NetworkManager is your friend. > > > Please elaborate "DHCP and Network Manager" with respect to not needing RAID. > > That was for Gene, I known he can not live without them
