[mythtv-users] backend storage performance needs?

[Tim Draper]

 ---- On Tue, 19 May 2020 16:03:36 +0100 James Abernathy <jfabernathy at gmail.com> wrote ----
 > 
 > Thanks for your thoughts.
 > I'm wondering if instead of RAID 1, I should just use 1-2TB SSD as a recording drive and then once a night do a cronjob that rsync's the recordings to an external drive for backup. I really only have about 800GB of actively use space for recordings because once my wife and I have seen them we delete them. Not building a library. 
 > I was doing the rsync part in preparation to upgrading to mythtv V31 in case I could not just move the current RAID.  
 > Also I know that I can record 4 HD programs while watching a recording all at once because I did this as a test on my RPi4, HDHR Quatro, and USB3-to-SATAIII 1TB SSD.
 > The RAID needs are because I also use my backend as a NAS for other data, mostly backups.Then my drive list would be:1-2TB SSD as boot drive and Mythtv Recordings
 > 2-2TB HDD as RAID 1 mirror for general NAS use for home computers.
 > 1 external 2TB HDD drive to backup recordings daily.
 > That would take head movement out of the equation and at most I'd lose one day's recordings.
 > Jim  A 

depends what your aim is. Raid is not backup. and backup is not raid. Raid covers for disk failures, backups cover for deletions and oversights; the non-hardware side.
personally, i'd recommend going raid for your requirements.