What's the Issue With Using 2 Different HDD for Raid?

I've been looking around, and I can't find any issues with doing raid with different model drives (same storage capacity). I know that the slower drive will bottleneck the faster drive's transfer speed, but is that it, or will it result in errors, or something else?

I'm thinking of using a 1TB Seagate SSHD and a 1TB WD Blue (will both be bottlenecked by gigabit ethernet speed) in raid 1. Will there be any issues?

Nah, I've done this before without any issues.

Yeah, as long as they're the same capacity I'm pretty sure it's fine. I've done RAIDZ-1 with 2 different brands of drives for a while now, and nothing has caught fire yet...knock on wood

BUMP

Just want some more people to say their experience with 2 different model drives in raid 1

Hard drives are not graphics cards. There's no "issue".
Also, where did you learn of this "issue"?

The only problem you may run in to is if one drive is slower then then the rest impacting performance.

This sums up my experience with RAID 1, very little actual performance increase and you risk losing twice as much data if you don't have yet more hard drives laying around for backups. If you do have enough drives to act as backup you might as well be doing RAID 5 or 10 to begin with. If you plan to use this setup for an extended amount of time just don't get too attached to your data. Mine only lasted about 2 years, but I had just used the system like it could die at any time so no biggie.

its fine as long as capacity match. i am running a sata2 2TB HDD from seagate and a sata3 2TB from WD and its completely fine in raid 1 or in raid 0. my older drive is limiting the speed but i dont mind.