…absolutely, positively, super false. I work in a sector where we’re constantly dealing with huge capacity enterprise SSDs - 15 and 30 terabytes at times. Always using RAID. It’s not even a question. Not only can you have controller malfunctions, but even though you’ve got what’s known as “over provisioning” on the SSDs, you still need to watch out for total disk failures!
this post was submitted on 05 Apr 2024
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Asklemmy
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Unlike hdd, I never experienced graceful disk failures on ssd. Instead, they just randomly decided to die at the most inconvenient time. Raid 1 saved my hide a couple times now from those ssd failures.
Yep. While it has been decades since I had a home SSD failure. But I have had 2 SSD failures in the last 10 years in server hardware. In the first case it was RAID striped and I needed to restore from backup. In the second case it was part of a raid 1 array and I just requested a replacement and got on with my day.
In my house, I have non raid SSDs on my own PC. But important stuff is on my NAS made up of 4xHDD drives in raid 5 (that also has the important folders backed up to an encrypted cloud).
RAID still has a place in an overall data security solution. Especially for servers that you want to keep up.
Yeah and Titanic was unsinkable.
If the controller in your SSD fries, it doesn't matter how many unused gigabytes your SSD has got for relocating bad sectors. It is still fried. For you, that data is forever gone.
This is why you have redundancy. Full redundancy. You can go for RAID1, one disk die and you still have no data loss, or go bananas with RAID6, two full disks can die and you're still going strong.
Ps. Spinning harddrives have had hidden sectors used for relocation of bad sectors for ages. It's nothing new. If you have to much time on your hand, Google harddrive hidden sectors nsa.
SSDs still have component bottlenecks that can kill the whole drive, same as hard drives.
Also, 3-2-1 is far superior to RAID, but having RAID on top of that is nice.
- Maintain three copies of your data: This includes the original data and at least two copies.
- Use two different types of media for storage: Store your data on two distinct forms of media to enhance redundancy.
- Keep at least one copy off-site: To ensure data safety, have one backup copy stored in an off-site location, separate from your primary data and on-site backups. https://www.veeam.com/blog/321-backup-rule.html
3-2-1 is for backup, RAID is also for availability, eg your domain server not going down in case of drive failure. good point though.
People say RAID isn't backup, but I've never understood that. Yes it's only one medium and it's probably not off-site, but if you've got an off-site copy in a different medium, why doesn't a single RAID 5 count as 2 copies of your data to add up to get the 3 in 321 backup?