Hope everyone’s off to a good weekend. I’d like to request advice and support as I navigate a slightly tricky situation with my homelab storage setup. Admittedly, I was a novice when I began my journey into this realm, and my understanding of VDevs, storage pools, and RAID arrays was quite basic at the time…mistakes were made.

I initially started with two mirrored 6TB drives, but for reasons now unclear to me, I decided to un-mirror them. Not my finest hour, but we live and learn. As I’ve read about data resiliency and learned more, I realize that I’m operating without a safety net and a single drive failure is going to be catastrophic.

Currently, my setup includes a single pool with three drives (12TB/6TB/6TB), operating without backup or resilience. It’s a ticking time bomb, and I’m keen to address this issue urgently.

To give you a better picture, my server is a Dell tower that can accommodate two disks. It currently holds my Trusnas OS on an SSD, with two additional disks. I also have a 4-disk external SATA enclosure with one drive, giving me a total of six disk slots.

Here’s my vision for an improved setup:

  • Implementing a RAID array on my disks (RAID5 seems appealing, but I’m open to a simpler mirrored pool if that’s advisable)
  • Creating a local backup with a dedicated set of disks
  • Ensuring future scalability, as my current usage is around 16TB out of the available 24TB, and I anticipate needing more space within the next couple of years.

The challenge I’m grappling with is how best to migrate the data from my existing three disks into a new storage pool. Ideally, I’d like to end up with a RAID5 array of 3x 18TB drives, providing 27TB of usable, resilient storage. I could then use a 16TB disk along with my existing 12TB drive as a standalone local backup, and phase out the 6TB drives, which have been running for 5+ years.

My initial thought is to create the 3x 18TB RAID5, migrate the data there, and then replace my current pool with the new one. Following that, I could remove the 2x 6TB drives, reformat the 12TB drive, add it to a new pool with the 16TB drive, and run a backup.

However, I’m unsure about how to add more disks in the future should I need to expand my storage beyond 27TB.

Any constructive feedback, suggestions for alternative approaches, or validation that I’m on the right track would be greatly appreciated. Thanks in advance for your time and expertise.

  • snatch1e@alien.topBEnglish
    1·
    1 year ago

    So, basically, try to follow 3-2-1 backup rule to keep your data safe. https://www.veeam.com/blog/321-backup-rule.html

    The most default configuration is a local backup (on external drives or backup NAS) and a cloud copy. Cloud storage can be pretty costly for much storage, so at least have it for the most critical data.

    Also, keep in mind that https://www.raidisnotabackup.com/ , but it’s obviously good to have it for better availability of the data.

  • DogeshireHathaway@alien.topBEnglish
    1·
    1 year ago

    Firstly, there’s no reason your plan won’t work. So you can go forth and conquer if necessary.

    I’m not a fan of raid 5 unless you can articulate a need for a function that it uniquely provides. I would especially warn against it when used in conjunction with a USB enclosure. Lot of related horror stories on this sub, and I have one of my own. I’m a big advocate for unraid and other solutions that provide parity without striping data; it’s especially resilient in a homelab environment where tinkering is typical and mistakes are expected.

    I’m also not a fan of a local backup. Whenever you have a single system hosting the live and backup data, you subject that data to shared threats. Sure you can recover from more data loss or disk failure easier, but other threats have the potential of destroying your backup along with the live data.