With SSD storage, what what your thoughts on redundant storage devices (e.g RAID1), is it a waste, a nice to have or a must?
what are your experiences and thoughts on this ?
Appreciate your opinion, as I will probably move from HDD to SSD.
I’m quite disappointed by most comments so far talking about RAID and data loss. That is not what RAID is for at all.
RAID is for uptime/availability. When a drive fails, the system will keep running and working. For companies, that would lose thousands of currency per hour with a downtime, this is super important that the system keeps running. At home, it’s convenience that you can order a new drive and replace without hours of setting up and copying before you can watch the next episode again.
Backups are against data loss. If a single drive fails, a RAID fails or you get some encryption malware or an employee destroys stuff on purpose, then everything is destroyed. It doesn’t matter if it was a single, any RAID, HDD or SSD. You order a new drive, make a new volume and restore the data from your backup.
I also thought that way in the beginning, but then disaster recovery is too inconvenient and will take weeks to set everything to your standards, while with raid you just replace the drive and go
Not to mention that “temporary” directory that was supposed to last one week and wasn’t included in the backup script, but then happened to last several months holding important files
I have to agree, RAID has only one purpose - keep your data/ storage operating during a disk failure. Does not matter which RAID level or SW. Thank god you mentioned it before.
There can be benefits in addition depending on RAID level and layout, for example read & write speed or more IOP/s than an individual disk (either SSD or HDD). However, the main purpose is still to eliminate a single disk as a single point of failure!
Back to topic - if you have a strong requirement to run your services which (rely) on the SSD storage, even if a disk fails - then SSD Raid yes.
For example.: I have s server running productive instances of Seafile, Gitea, and some minor services. I use them for business. Therefore those services have to be available, even if one disk fails. I cannot wait to restore a backup, wait for a a replacement disk and tell a client, Hey, sorry my server disk failed” (unprofessional)
For protection against data loss - backups: one local on another NAS, one in the cloud. 👌🏼
It depends how valuable your data is, what backup strategy you have, and how long you’re prepared to wait to get access to your data when a drive fails.
Personally if/when I migrate my main dataset to SSD, I’ll stick with RAIDZ2/RAID6.
Depends on how attached you are on your data, if you have a backup, if you can do without the data created between backup cycles and how long you can wait for the restore to finish.
Everything will fail. For me, everything on single disk is expendable or backupped and can be done without when I loose a day/week of data. Everything else is on raid 1 (hdd) and in a backup schedule (external hdd).
I’ve had SSDs go bad. So if it’s something you really care about I’d approach it the same as hard disks.
Maybe as a side note: a mirror raid does not only provide data redundancy but also improves read speeds. For SATA limited SSDs this can be interesting.
SATA SSDs don’t really make sense nowadays anymore. Last time I checked, they cost the same and are actually the exact same thing, except SATA SSDs have a big, mostly empty, plastic case around them and use a slow connector
Sure, except that it is hard to connect several NVMe SSDs to an older mainboard.
How, with a couple of hba I can connect connect easily dozens of sata SSDs to a consumer motherboard, while doing the same with nvme drives not exactly as easy or cheap
