this post was submitted on 26 Aug 2024
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Selfhosted

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Data HDD with SSD catch drive (lemm.ee)
submitted 2 months ago* (last edited 2 months ago) by rambos@lemm.ee to c/selfhosted@lemmy.world
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After upgrading my internet connection I immediatelly noticed that my HDD tops 40 MB/s and bottlnecking download speed in qbittorrent. Is it possible to use SSD drive as a catch drive for 12 TB HDD so it uses SSD speeds when downloading and moves files to HDD later on? If yes, does it make sense? Anyone using anything simmilar? Would 512 GB be enough or could I benefit from 2TB SSD?

HDD is just for jellyfin (movies/shows), not in raid, dont need backup for that drive, I can afford risking data if that matters at all

All suggestions are welcome, Thx in advance

EDIT: I obviously have upset some of you, wasn't my intention, I'm sorry about that. I love to tinker and learn new things, but I could live with much lower speeds tho... Please don't hate me if I couldn't understand your comment or not being clear with my question.

HDD being bottleneck at 40 MB/s was wrong assumption (found out in meantime). I'm still trying to figure out what was the reason for download to be that slow, but I'm interested in learning about the main question anyway. I just thought I'm experiencing the same issue like many people today, having faster internet than storage. Some of you provided solutions I will look into, but need time for that and also have to fix whatever else I'm having issue with.

Keep this community awesome because it is <3

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[–] catloaf@lemm.ee 12 points 2 months ago (2 children)

It's probably a 5400rpm drive, and/or SMR. Both are going to make it slower.

[–] Markaos@lemmy.one 3 points 2 months ago

In my very limited experience with my 5400rpm SMR WD disk, it's perfectly capable of writing at over 100 MB/s until its cache runs out, then it pretty much dies until it has time to properly write the data, rinse and repeat.

40 MB/s sustained is weird (but maybe it's just a different firmware? I think my disk was able to actually sustain 60 MB/s for a few hours when I limited the write speed, 40 could be a conservative setting that doesn't even slowly fill the cache)

[–] Appoxo@lemmy.dbzer0.com 3 points 2 months ago

5.4k + smr would explain it at write but not at read.