On 15.02.2017 03:10, TE Dukes wrote: > > >> -----Original Message----- >> From: CentOS [mailto:centos-bounces at centos.org] On Behalf Of John R >> Pierce >> Sent: Tuesday, February 14, 2017 8:13 PM >> To: centos at centos.org >> Subject: Re: [CentOS] RAID questions >> >> On 2/14/2017 5:08 PM, Digimer wrote: >>> Note; If you're mirroring /boot, you may need to run grub install on >>> both disks to ensure they're both actually bootable (or else you might >>> find yourself doing an emergency boot off the CentOS ISO and >>> installing grub later). >> >> I left that out because the OP was talking about booting from a seperate > SSD, >> and only mirroring his data drive. >> > Thanks!! > > I'm only considering a SSD drive due to the lack of 3.5 drive space. I have > unused 5.25 bays but I'd have to get an adapter. > > I probably don't need to go the RAID 10 route. I just need/would like some > kind of redundancy for backups. This is a home system but over the years due > to HD, mainboard, power supply failures, I have lost photos, etc, that can > never be replaced. Backing up gigabytes/terabytes of data to cloud storage > would be impractical due to bandwidth limitations. > > Just looking for a solution better than what I have. A simple mirror is more > than I have now. I'd like to add another drive for redundancy and go from > there. > > What should I do? RAID is *not* a backup. If a virus or buggy program or an accidental "rm -rf *" in the wrong directory deletes files on a RAID then these files are obviously gone on the replicas as well. If you want to prevent the loss of files then instead you should add a second disk to the system and simply backup data on a daily basis to that disk. A RAID array is not the appropriate way to go for you scenario described above. Regards, Dennis