• 4 Posts
  • 125 Comments
Joined 1 year ago
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Cake day: June 12th, 2023

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  • why not btrfs send | btrfs receive? is there some advantage to rsync?

    I didn’t think of this. I am familiar with rsync, I went with it without searching for alternatives.

    did you hotswap the drives after each btrfs replace or shutdown and then swap?

    I did the swap with the system powered down. I don’t know if my the NanoPi + SATA hat support hotswap.

    what’s your host OS and do the drives spin down if inactive?

    The NAS runs Armbian. The disks are configured to spin down, yes. I don’t know if this caused me the issue while replacing disk 2. I suppose not, since during replace the disks are all reading continuously. But I don’t know for sure.

    Edit: fixed copy-past mistake with quoted sentences




  • This may be a simple coincidence. Maybe you had similar YouTube suggestions in the past but you didn’t pay attention because they come at random times. Like if you drive a Honda Civic, you tend to spot all the Honda Civic in the street.

    There would be an interesting experiment to make though:

    1. Take a snapshot of your YouTube recommandations
    2. Choose a subject that has nothing to do with any of the recommandations, let’s say “travel to the Bahamas”
    3. Hold a conversation with someone with both your phone’s present, mention several time going to the Bahamas.
    4. Check YouTube again, si if the topic of Bahamas is appearing.
    5. Choose another topic not covered by your recommendations, let’s say collecting stamps
    6. Put your phones away, have a conversation about collecting stamps
    7. Check YouTube recommandations




  • As far as I understand it, passkey is a password replacement and a protocol built on top of FIDO.

    The intention is to replace passwords by cryptographic keys (asymmetric encryption). These keys come in pairs always:

    • a private key: secret and only ever known to you
    • a public key: given to the service you want to authenticate to. This key can also be seen as a lock that can only be open by the matching private key.

    The keys are nothing more than text and they can very well be stored in files on a USB drive, copied, transferre, deleted, etc.

    But passkey also defines the process to exchange and store the keys in a secure manner. Therefore in practice you will always use a password manager and maybe also some specific hardware, to automatically hand the key exchange and secure storage of all the different keys your have for all of the different services you registered to.