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Linux 5.5 SSD RAID 0/1/5/6/10 Benchmarks Of Btrfs / EXT4 / F2FS / XFS

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  • #61
    Originally posted by DrYak View Post
    Normally scrub should take a couple of hours max, and is something that needs to be performed on a regular basis to guarantee data safety.
    (I tend to run it weekly, monthly is about the min recommandations).
    This depends on amount of data and how fast the machine can handle reading.

    If having 12-14 TB of data on a drive and the machine manages about 150 MB / second then you get a total runtime of around 24 hours. With the larger drives, it's really important to make sure that the drives are connected to controllers that can handle the full transfer speed the disk supports. And even when using ATA-600, most drives are limited to 200-250 MB/second.

    So in the end, for really large drives it's often meaningful to split the scrub into multiple runs using cancel/resume instead of doing one huge scrub every x days.