I used to have a boss that said that there are two types of IT admins, those that used hardware raid once and will never again, and those that haven't lost any data to it yet.
this post was submitted on 03 Sep 2025
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Thankfully, we never lost data, but we have had the controller die a few times through the years on a few servers before. Thankfully we had great support and the part was same day delivered to us to replace and the 2nd time was a Dell server which we also get the part same day and a tech to come replace it for us.
We avoided buying servers with this going forward. At this point, we really only have VM's and only a handful of physical servers anymore, so it's not even a concern.
I read online that the controller failure is a thing and not that uncommon. I really don’t want to rely on HP hardware tbh.
Parts fail all the time. The problem with hardware raid is you need a compatible controller or none of the data can be read even though it is still on the physical disks. Computer hardware is often only made for a few months before there is a new model and so you are risking that the manufacture really made the new model work with what you have. That is assuming the manufacture doesn't go out of business which could happen without warning. \
Also, if hardware breaks that is often a good excuse to replace it - odds are better hardware is available for the same price and sometimes a lot less $ - with hardware raid you are stuck paying whatever price they charge.
Got it, thanks! Yes for my personal use I rather not rely on HP hardware at all and disable the whole raid thing entirely.
Well fuck me now I’m scared. So, for him the problem is hardware raid?
It all depends on the greed of the campaign. I worked in a campaign where it was considered normal to keep a degraded raid without repair. Of course, data loss is a normal story in such companies. The raid guarantees data security only when one disk is being pulled (except for some raids), so it also needs to be monitored and replaced. On the other hand, with proper operation, you probably won't lose any data.
P.S. RAID0 - raid that can't be restored when degraded any disk in RAID. This is exactly worse choice for data save. STRIPE also writes blocks one at a time to the first disk and to the second, so that you would definitely lose exactly 50% of data blocks. Best choice raid10 for performance and raid5 if you need save money.
With all these different disk sizes, maybe "Unraid" is for you? I don't really know it, just guessing.
Mmm I personally rather avoid closed source software if I can. Afaik unraid is a whole os system that does all the work, so I also rather have different tools that do well their job than 1-in-all system. Decentralisation is always king. Plus I’m okay with not having a real time redundancy but just an easy snapshot system with Snapraid.
Just swap the raid controller for an HBA.
HBA is not real pass-through of drives, it creates a raid 0 for each one, striping them. If the controller fails, you can’t read anything.
No, it does not. An HBA (or a raid controller flashed to IT mode I think) presents the disks directly to the system. I've done this several times.
This is what I read on hp forums, for safety I removed the controller entirely. The less HP stuff I use the better.
Thanks for the support, in the end I opened the server removed the raid smart array controller and connected the drives directly to main board. Checked within the BIOS and I see them perfectly.
If you are looking for a HPE P440ar Smart array controller to buy hit me up :)
I liked qdirstat
When you say raid 0 on the data disks do you mean just having the disks present as single disks and not putting them into arrays? As seeing raid 0 and data storage makes me very nervous.
And yeah I'd take a disk out of your boot array and then that into a raid 1 so you can use the extra for storage/ redundancy elsewhere.
Ah gotcha. See if if your raid controller can be flashed/switched to IT mode(HP might call it something else) as then you won't have to deal with the raid controller's raid settings and doing anything weird. Then you can just rely on snapraid to manage the drives.
Okay after a some search looks like I have 3 options:
- stick to my original plan but consider multiple points of failure (controller and Raid 0 on single disks)
- The “IT” mode for HPE is called HBA but as far as I read it just creates a bunch of RAID 0 single drives (lol). I also need to update bios firmware because I don't have this mode on my controller (huge pain in the ass)
- Just switch from the Dynamic Smart Array RAID to legacy SATA AHCI and bypass hardware raid completely and switch off the controller. I need to reinstall ubuntu and headscale though :’(
I think i will go with the last one.
If you go down that route then look at zfs which will allow you some redundancy (like raid) raidz1 can tolerate 1 drive dying and radz2 can tolerate 2, but obviously it is not 100% though I have never had a drive failure corrupt a zfs pool in like 10 years, and replacing a drive is easy. This question has, I'm afraid, many answers. zfs on a 3 drive system would run nicely though, and zfs is supported by Ubuntu. But of course we are talking different ways to do things, and this is part of the fun of self hosting!
oh and then there is truenas which will do all that you want and allows installation of things like plex and/or jellyfin automagically
Every disk will be in a single array raid 0 with just itself. In other words, every array is just 1 disk in raid 0 (this because HPE doesn't have a no-raid option).