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This new 40TB hard drive from Seagate is just the beginning—50TB is coming fast!
(www.techradar.com)
this post was submitted on 02 Jun 2025
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Raid 5 is becoming less viable due to the increasing rebuild times, necessitating raid 1 instead. But new drives have better iops too so maybe not as severe as predicted.
Yeah I would not touch RAID 5 in this day and age, it's just not safe enough and there's not much of an upside to it when SSDs of large capacity exist. RAID 1 mirror is fast enough with SSDs now, or you could go RAID 10 to amplify speed.
When setting up RAID1 instead of RAID5 means an extra few thousand dollars of cost, RAID5 is fine thank you very much. Also SSDs in the size many people need are not cheap, and not even a thing at a consumer level.
5x10TB WD Reds here. SSD isn’t an option, neither is RAID1. My ISP is going to hate me for the next few months after I set up backblaze haha
But have you had to deal with the rebuild of one of those when a drive fails? It sucks waiting for a really long time wondering if another drive is going to fail causing complete data loss.
Not a 10TB one yet, thankfully, but did a 4TB in my old NAS recently after it started giving warnings. It was a few days iirc. Not ideal but better than the thousands of dollars it would cost to go to RAID1. I’d love RAID1, but until we get 50TB consumer drives for < $1k it’s not happening.
tbf all the big storage clusters use either mirroring or erasure coding these days. For bulk storage, 4+2 or 8+2 erasure coding is pretty fast, but for databases you should always use mirroring to speed up small writes. but yeah for home use, just use LVM or zfs mirrors.