Linux 6.13 Rolling Out NVMe 2.1 Support & NVMe Rotational Media

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  • ayumu
    replied
    Originally posted by caligula View Post

    Moore's law. SATA3 is limited to 600 MB/s per drive. NVMe already supports PCIe 5.0 16x drives already transfer up to 63 GB/s and more is expected with PCIe 6.0. You just need to spin the motor a bit faster.
    who's making HDDs that are this fast?

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  • ahrs
    replied
    Originally posted by Joe2021 View Post
    Sounds great. Nevertheless it is so sad that most consumer SSDs only support exactly one namespace at once. That is as useful as a partition table scheme capable to hold one partition max - aka pointless!
    You want more? Most of my installs consist of exactly one partition on legacy BIOS/MBR (ignoring the small unformatted partition at the beginning that's unused for the bootloader) and two on UEFI/GPT systems.

    Is there something I'm missing? Are namespaces for VMs or containers? You might as well run some complicated LVM setup instead and do it in software.
    Last edited by ahrs; 18 November 2024, 08:18 PM.

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  • elvis
    replied
    Originally posted by davidbepo View Post
    also wake me up when an HDD comes close to even touching sata limits, this is just nonsense
    The post directly after yours linked to an excellent YouTube video demonstrating that this has lots of benefits for multi-disk applications.

    When you're rolling out massive drive arrays for S3 storage, ZFS nearline arrays, Ceph clusters, etc, then NVME has a lot of benefits over legacy SATA/SAS in both simplifying the connection points, as well as removing some upper limits to how many devices can be attached without needing more controllers.

    Similarly, hanging lots of rotational disks off a single 6Gbit controller with port multipliers is absolutely a bottleneck. Again, see the video for how simplified PCIE switching and NVME results in simpler hardware and higher speeds.

    The video also talks about what it looks like when every bit of compute and IO is all on the same fabric. For future workloads, having multiple classes of storage, network, GPUs and the like all on the same PCIE/NVME fabric simplifies a lot of problems we have in high end clustering.

    Lots of applications for this beyond what a single drive looks like in 2024. NVME looked pretty silly even for flash when it first arrived, because we couldn't hit those speeds back then. But it was clear that it was a necessary change as things moved forward. Limiting things to today's technology is not how the industry works.

    Originally posted by davidbepo View Post
    NVMe requires a new physical connector and form factor over SATA/SAS
    When has that ever stopped the progression of disk technology (or any technology)? We've had things like SCSI, IDE, SATA, and SAS over the years. Physical connector changes are a natural part of technological evolution.
    Last edited by elvis; 18 November 2024, 06:56 PM.

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  • discordian
    replied
    still waiting to connect my cd-burner over NVME. why arent there any forward looking standards?

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  • hajj_3
    replied
    Originally posted by davidbepo View Post
    wait what, why would you use NVMe for HDD?
    Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube.

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  • davidbepo
    replied
    man people here with the memes and missing the point so hard
    NVMe requires a new physical connector and form factor over SATA/SAS, also wake me up when an HDD comes close to even touching sata limits, this is just nonsense

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  • caligula
    replied
    Originally posted by davidbepo View Post
    wait what, why would you use NVMe for HDD?
    Moore's law. SATA3 is limited to 600 MB/s per drive. NVMe already supports PCIe 5.0 16x drives already transfer up to 63 GB/s and more is expected with PCIe 6.0. You just need to spin the motor a bit faster.

    Leave a comment:


  • uid313
    replied
    Originally posted by davidbepo View Post
    wait what, why would you use NVMe for HDD?
    Well, else you would probably use Serial-ATA (SATA) which is currently at revision 3.5a released in 2021 but it derives from SATA 3.0 released in 2018 or 2019 so it is still only 6 Gbit/s which is 600 MB/s.

    When is SATA going away, when is SATA getting replaced, and when is SATA getting a major upgrade that increases the bandwidth?

    It's too bad that most motherboards just have one or two M.2 slots.

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  • Quackdoc
    replied
    Originally posted by edxposed View Post
    This seems to make it possible for Android to adopt NVMe instead of UFS, which previously had no standardized inline encryption offload support. Too bad 6.13 isn't an LTS.
    well *android* could be installed on nvme for ages now its just up to the manufacture to choose what to do

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  • edxposed
    replied
    This seems to make it possible for Android to adopt NVMe instead of UFS, which previously had no standardized inline encryption offload support. Too bad 6.13 isn't an LTS.

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