Linux

8299 readers

216 users here now

Welcome to c/linux!

Welcome to our thriving Linux community! Whether you're a seasoned Linux enthusiast or just starting your journey, we're excited to have you here. Explore, learn, and collaborate with like-minded individuals who share a passion for open-source software and the endless possibilities it offers. Together, let's dive into the world of Linux and embrace the power of freedom, customization, and innovation. Enjoy your stay and feel free to join the vibrant discussions that await you!

Rules:

Stay on topic: Posts and discussions should be related to Linux, open source software, and related technologies.
Be respectful: Treat fellow community members with respect and courtesy.
Quality over quantity: Share informative and thought-provoking content.
No spam or self-promotion: Avoid excessive self-promotion or spamming.
No NSFW adult content
Follow general lemmy guidelines.

founded 2 years ago

MODERATORS

MigratingtoLemmy

Migrating to ZFS (self.linux)

submitted 11 months ago by sailingbythelee to c/linux

12 comments fedilink hide all child comments

I recently purchased a used PowerEdge R420 rack server with a Compellent SC220 Storage Shelf. I currently have four 3.5" HDDs in the R420 and ten 2.5" HDDs in the SC220. The R420 server previously had TrueNAS installed, so all of the hard drives on both the R420 and the SC220 are formatted with ZFS. I'm now running Ubuntu on the R420 using ZFS.

The server I'm replacing is an old gaming PC running Manjaro and BTRFS. It has one SSD with the operating system and two 4 TB HDDs set up as RAID0. I've been using the RAID to store media downloaded via the Servarr stack.

So, my goal is to create a large pool out of all of the HDDs (except the one running the OS) on the R420 and SC220, and then migrate the media data on the two 4 TB RAID0 drives on my old gaming PC over to R420/SC220 pool. I would then move my Servarr stack over to the R420 as well. Ideally, I'd also like to physically move the two 4 TB HDDs over to the R420. Presumably, I would have to reformat the drives to use ZFS rather the BTRFS and then integrate them somehow into the ZFS pool?

Anyway, I'm not sure of the best procedure to accomplish all of this, so I would be grateful to hear from anyone who has any experience or insight. Thanks in advance.

you are viewing a single comment's thread
view the rest of the comments

[–] [email protected] 1 points 11 months ago (1 children)

datasheet for one of the drive models apparently these have a dual SAS interface, so what you are seing could be completely normal. i dont have any experience with this type of setup though.

btw you can uniquely identify partitions by using something like lsblk -o+PARTUUID,FSTYPE the partuuid should never repeat in the output even if the partition table was somehow used as a template (though "dd"ing from disk to disk will duplicate those of course)

also check out the "SERIAL" column for lsblk to uniquely identify the drives themselves.

[–] sailingbythelee 0 points 11 months ago

Thanks, you are incredibly helpful. The four HDDs in the R420 are SCSI drives, while the ones in the SC220 are SAS drives, and it is indeed the 10 SAS drives in the SC220 that have two device letters each. Wow, how about that. If this is the explanation for why there are two devices per drive, I see on the SAS wiki that it has something to do with: "SAS devices feature dual ports, allowing for redundant backplanes or multipath I/O; this feature is usually referred to as the dual-domain SAS."

That gives me plenty to go on for further online research. I was just getting crap search results before, but now I have a better idea what to search for. Thanks a lot!!