From: Dale <rdalek1967@gmail.com>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] m.2 nvme stick not what I was expecting at all.
Date: Wed, 26 Feb 2025 08:43:41 -0600 [thread overview]
Message-ID: <f14b8557-8bb6-e0f6-abe0-ff6b6dd82891@gmail.com> (raw)
In-Reply-To: <CAGfcS_k-sz2M3BV-OQ9Xq_9Nu_2NAOCw+gGHQTeD=Pw5WdYL6Q@mail.gmail.com>
Rich Freeman wrote:
> On Tue, Feb 25, 2025 at 12:26 PM Dale <rdalek1967@gmail.com> wrote:
>> I'm pretty sure you mentioned this once before in one of my older
>> threads. I can't find it tho. I use PCIe x1 cards to connect my SATA
>> drives for my video collection and such. You mentioned once what the
>> bandwidth was for that setup and how many drives it would take to pretty
>> much max it out. Right now, I have one card for two sets of LVs. One
>> LV has four drives and the other has three. What would be the limiting
>> factor on that, the drives, the PCIe bus or something else?
> It depends on the PCIe revision, and of course whether the controller
> actually maxes it out.
>
> 1x PCIe v3 can do 0.985GB/s total. That's about 5 HDDs if they're
> running sequentially, and again assumes that your controller can
> actually handle all that data. For each generation of PCIe
> forward/backwards either double/halve the transfer rate. The
> interface works at the version of PCIe supported by both the
> motherboard+CPU and the adapter card.
>
> If you're talking about HDDs in practice the HDDs are probably still
> the bottleneck. If these were SATA SSDs then odds are that the PCIe
> lane is limiting things, because I doubt this is an all-v5 setup.
>
> https://en.wikipedia.org/wiki/PCI_Express#History_and_revisions
>
> The big advantage of NVMe isn't so much the bandwidth as the IOPS,
> though both benefit. Those run at full PCIe 4x interface speed per
> drive, but of course you need 4 lanes per drive for this, which is
> hard to obtain on consumer motherboards at any scale.
>
This I think is what I needed. As it is, I'm most likely not maxing
anything out, yet. The drives for Data, torrent stuff, stays pretty
busy. Mostly reading. My other set of drives, videos, isn't to busy
most of the time. A few MBs/sec or something, playing videos type
reading. Still, next time I power down, I may stick that second card in
and divide things up a bit. Might benefit if those cards aren't to great.
I did copy this info and stuck in in a text file so I don't have to dig
for it again, or ask again. ;-)
Thanks.
Dale
:-) :-)
next prev parent reply other threads:[~2025-02-26 14:44 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-24 18:58 [gentoo-user] m.2 nvme stick not what I was expecting at all Dale
2025-02-24 19:20 ` Jack
2025-02-24 19:49 ` Dale
2025-02-24 19:40 ` Mark Knecht
2025-02-24 19:41 ` Rich Freeman
2025-02-24 19:53 ` Dale
2025-02-24 20:00 ` Rich Freeman
2025-02-24 20:34 ` Dale
2025-02-24 20:02 ` eric
2025-02-24 20:11 ` Mark Knecht
2025-02-24 20:44 ` Dale
2025-02-24 22:48 ` Frank Steinmetzger
2025-02-25 3:56 ` Dale
2025-02-25 10:08 ` Michael
2025-02-25 11:00 ` Dale
2025-02-25 11:16 ` Michael
2025-02-25 15:57 ` Dale
2025-02-25 17:05 ` Rich Freeman
2025-02-25 19:00 ` Michael
2025-02-25 19:18 ` Rich Freeman
2025-02-25 20:39 ` Michael
2025-02-25 22:16 ` Frank Steinmetzger
2025-02-25 14:48 ` Peter Humphrey
2025-02-25 17:00 ` Michael
2025-02-24 22:13 ` Frank Steinmetzger
2025-02-25 4:20 ` Dale
2025-02-25 8:18 ` Wols Lists
2025-02-25 14:07 ` [gentoo-user] " Grant Edwards
2025-02-25 8:20 ` [gentoo-user] " Wols Lists
2025-02-25 11:09 ` Dale
2025-02-25 12:26 ` Dale
2025-02-25 15:04 ` Rich Freeman
2025-02-25 15:32 ` Dale
2025-02-25 16:29 ` Rich Freeman
2025-02-25 17:26 ` Dale
2025-02-25 17:41 ` Rich Freeman
2025-02-26 14:43 ` Dale [this message]
2025-02-26 16:38 ` Michael
2025-02-26 20:34 ` Dale
2025-02-26 20:48 ` Mark Knecht
2025-02-25 20:19 ` Wol
2025-02-25 20:21 ` Michael
2025-02-25 21:34 ` Frank Steinmetzger
2025-02-26 7:52 ` Wols Lists
2025-02-26 16:44 ` Michael
2025-02-26 18:03 ` Wol
2025-02-26 18:05 ` Rich Freeman
2025-02-26 18:42 ` Wol
2025-02-26 19:26 ` Rich Freeman
2025-02-26 19:47 ` Wols Lists
2025-02-26 19:56 ` Rich Freeman
2025-02-26 21:25 ` Wol
2025-02-26 22:37 ` Michael
2025-02-26 16:41 ` Michael
2025-02-28 5:43 ` Dale
2025-02-28 16:40 ` [gentoo-user] " Grant Edwards
2025-03-02 16:01 ` Dale
2025-03-02 22:06 ` Frank Steinmetzger
2025-03-02 22:39 ` Dale
2025-03-03 3:01 ` Grant Edwards
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