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Btrfs Adds Degenerate RAID Support, Performance Improvements With Linux 5.15

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    Congelli501
    Junior Member

  • Congelli501
    replied
    I'll admit to being a little bit shocked that it doesn't work that way already -- isn't that the point of using a mirrored RAID type?
    ​​​​​​
    That's because it makes no sense in any real world usage : RAID 0 is not mirror, it's stripping, and on a single disk there can't be any stripping.

    Raid 10 with 2 drives is just a raid 1 (mirror on 2 disks without any stripping layer on top of it).

    Leave a comment:

  • stormcrow
    Senior Member

  • stormcrow
    replied
    Michael, this is somewhat off topic though not entirely because this will impact the performance and reliability of end user experiences with any filesystems. Have you been following the recently revealed bait and switch tactics in the SSD space involving properly spec'd hardware sent to reviewers, then changing out the electronics for cheaper off spec ICs (like TLC storage being changed to QLC without notification or model number changes) when actually shipped to customers?

    https://www.tomshardware.com/news/sa...-ssd-parts-too
    https://www.extremetech.com/computin...and-the-p2-ssd

    If you've reported on it already, I apologize. I missed it.

    Leave a comment:

  • Quidnam
    Junior Member

  • Quidnam
    replied
    Under the native Btrfs RAID [de]generate modes, RAID0 can function off a single device and RAID10 can function with two devices rather than needing two devices for RAID0 and four devices for RAID10. This Btrfs RAID degenerate mode was added to assist when converting or removing devices from an array while preserving the profile type.
    I'll admit to being a little bit shocked that it doesn't work that way already -- isn't that the point of using a mirrored RAID type?

    Leave a comment:

  • phoronix
    Administrator

  • Btrfs Adds Degenerate RAID Support, Performance Improvements With Linux 5.15

    Phoronix: Btrfs Adds Degenerate RAID Support, Performance Improvements With Linux 5.15

    The Btrfs file-system updates have landed now in Linux 5.15 mainline with some exciting new features and improvements...

    https://www.phoronix.com/scan.php?pa...nux-5.15-Btrfs
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