this post was submitted on 06 Apr 2024
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Thoughts on these SATA/M.2-->SATA/2.5" adapters? (feddit.nl)
submitted 7 months ago by helenslunch@feddit.nl to c/selfhosted@lemmy.world
34 comments fedilink hide all child comments
 

Trying to squeeze some more storage in my MiniPC. I have questions about these. These use hardward RAID with selectable modes (Individual/JBOD/RAID1/RAID2).

  1. If I use RAID 1 and one of the drives fails, will I know?

  2. If a drive fails, and a slap in a new one, will it internally begin repairing RAID 1 again?

  3. Can I use these as "individual" or JBOD and have 2 separate drives through the same connector, and use something like TrueNAS to software-RAID them?

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[–] scrubbles@poptalk.scrubbles.tech 6 points 7 months ago (2 children)

Neat, but I see it personally as the worst of both worlds, unless you have a bunch of NVMEs sitting around.

You're going to be bottlenecked by SATA speeds, so even one NVME would be bottlenecked, let alone 2. So for me, going with a larger SATA SSD (which you could of course RAID with another) would probably get you still better speeds.

Then you have issue of it breaking. Personally, I have never had good luck with secondary board RAID items like this. They always fail after a while. The only stable raids I have seen are motherboards and SAS. Whenever I see "Make this interface into another RAID" I think of the.... 5-7 failed cards sitting behind me.

[–] slacktoid@lemmy.ml 3 points 7 months ago (1 children)

M.2 is a form factor. Under that form factor it can run the NVMe or the SATA protocol.

[–] scrubbles@poptalk.scrubbles.tech 1 points 7 months ago (1 children)

Answered elsewhere in this thread. Yes, I'm aware, but the only real life use case is plugging in nvme drives

[–] slacktoid@lemmy.ml 1 points 7 months ago (1 children)

There are m.2 sata drives. They have a different pin layout and everything. It depends on what you want out of the QoS of your system and what bottlenecks you have.

[–] scrubbles@poptalk.scrubbles.tech 0 points 7 months ago (1 children)

Yeah, just then I still think it's the worst of both worlds. You still have a single point of failure, that raid controller on that device probably can't be ported anywhere else (at least most of the cheap controllers I've seen haven't been able to, most mobo raids I've been able to recover), and so if you don't have redundancy anyway, then a larger SSD is to me, the way to go. Honestly a single SSD and a nightly backup to an external would be how I'd do it if I was on a budget and only had one SATA port remaining.

[–] slacktoid@lemmy.ml 4 points 7 months ago

Yeah thats the problem with hardware raid in general.

[–] 01189998819991197253@infosec.pub 3 points 7 months ago (1 children)

TIL these exist. Neat.

[–] aard@kyu.de 2 points 7 months ago (1 children)

JBOD relies on an optional SATA extension, which most of your controllers won't have.

That leaves you with RAID in the controller - which is a bad idea, as you don't have much control over what is going on, and recovery if it fails will possibly messy.

[–] mathers@l.mathers.fr 2 points 7 months ago
  1. Since you mentioned that speed wasn't a concern, I would go with software raid, which would also alleviate your concerns about 1 and 2.
[–] BigMikeInAustin@lemmy.world 2 points 7 months ago

I'm not saying this rudely. This sounds like a "read the manual" moment, since different vendors can have different settings.

Or at least links to the exact one you are looking at.

[–] Decronym@lemmy.decronym.xyz 1 points 7 months ago* (last edited 7 months ago)

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

Fewer Letters More Letters
NAS Network-Attached Storage
NVMe Non-Volatile Memory Express interface for mass storage
PCIe Peripheral Component Interconnect Express
RAID Redundant Array of Independent Disks for mass storage
SATA Serial AT Attachment interface for mass storage
SSD Solid State Drive mass storage

[Thread #660 for this sub, first seen 6th Apr 2024, 21:05] [FAQ] [Full list] [Contact] [Source code]

[–] uninvitedguest@lemmy.ca 1 points 7 months ago

Super cool. I didn't know this existed.

[–] possiblylinux127@lemmy.zip 0 points 7 months ago (1 children)

Do not use one with any kind of logic. The mSATA ones are fine because they just passthough

[–] Kidplayer_666@lemm.ee 0 points 7 months ago (1 children)

Question, where did you find these?

[–] Hiro8811@lemmy.world 0 points 7 months ago (1 children)

If I'm not wrong these are not compatible with nvme? I remember I wanted to buy something like this but I couldn't find PCIE to SATA, pretty sure I'm wrong but not in the mood to research

[–] Paragone@lemmy.world -1 points 7 months ago

IF JBOD, && Linux, THEN yes you can know, through SMARTTOOLS, or something like that..

However, I can't imagine how you'd get 2 separate PCIe

( presuming NVMe devices ..

.. no, this thing must be presuming SATA, NOT NVMe ..

even in SATA, there's no bifurcator for SATA, I don't think:

SAS has expanders, which can take a single SAS channel & attach something like 128 SAS devices onto it,

PCIe has some kind of equivalent, and there is a PCIe card which crams loads of NVMe's into it, out in the last year, but SATA??

Hmm... )

shrug