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So assuming you are using mdadm you can do exactly what you suggest The only caveat is that the raid monitoring utility will generally only handle one disk at a time and normally when you have marked one as failed. Further you just need to ensure that it has completed copying the data before removing the old disks from the raid array otherwise you'll end up ...


1

I don't see how you can add two disks at the same time in the general case and migrate over. (I know that you can do things like that with LVM trickery if that's what you use for your RAID1.) What looks like it should work in any case is this: pull old HD2 insert new HD2 wait for RAID to handle failure of HD2 by copying old HD1 onto new HD2 pull old HD1 ...


3

umount is perfectly safe for the disk. Once you've done that you have successfully unmounted the filesystem and you needn't worry along those lines. The primary difference between eject and umount doesn't concern the disk at all - rather it is about the USB port's 5v power output. After umount you can still see your disk listed in lsblk because it is still ...


6

If you are using systemd then use udisksctl utility with power-off option: power-off Arranges for the drive to be safely removed and powered off. On the OS side this includes ensuring that no process is using the drive, then requesting that in-flight buffers and caches are committed to stable storage. I would recommend first to ...


1

IIRC this can very from drive to drive. Most brands: Once testing is done at the manufacturer the firmware is loaded which will begin monitoring the first time the drive is started by the user. The firmware does not monitor actual times. It works exactly like the hour meter on a plane. The only difference being some brands might do testing with the ...



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