• 32 Posts
  • 52 Comments
Joined 1 year ago
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Cake day: June 21st, 2023

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  • Raid stopped being optimal now that btrfs and ZFS exist.

    If you plan on doing matching drives ZFS is recommended

    If you expect mismatched disks, btrfs will work.

    If you are most worried about stability get a computer with ECC memory.

    If you are most worried about performance, use SSD drives.

    If you want a bunch of storage for cheap, use spinning disks (unless you exceed the 100TB capacity range)












  • greengnu@slrpnk.nettodatahoarder@lemmy.mlZFS backup strategy
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    1 year ago

    Your ZFS backup strategy should be to follow one of the following rulesets:

    3-2-1 [3 copies of the data at 2 different locations for the 1 purpose of preserving the data]

    4-3-2-1 [4 copies of the data at 3 different locations in 2 different types of media for the 1 purpose of preserving the data]

    5-4-3-2-1 [5 copies of the data at 4 different locations across 3 different continents in 2 different types of media for the 1 purpose of preserving the data]

    The details of the backup is more if you have a second system to enable ZFS send/receive or if you have to transport deltas from ZFS send







  • well no storage can be 100% efficient but you are correct that thermal storage is very efficient if you want a thermal gradient to leverage for heating (cooling as well)

    I am assuming you mean Pumped-storage hydroelectricity when you say PHES and no it also falls under F=ma, but when using the terrain is able to increase the amount of mass to a more industrial useful scale. The larger the scale the smaller the losses. Hence most economical when one has mountains for the storage of the water. (metal/plastic tanks on elevated platforms tend to be much less efficient and more expensive).

    I guess it depends on what you mean by rare long duration events but yes one can imagine a situation where the burning of hydrogen is justified on an energy needs basis.




  • Depends on what you mean by a huge problem.

    If you are referring to energy loses due to the large distances and the electrical resistance of the wires carrying that power; you’ll discover those loses are directed related to current and that you can trade current for voltage and trade voltage for current; so we can avoid losses by upping the voltage.

    If you are referring to the fact that the Earth’s crust is moving, we can have geologists do some work; estimate the distances spaces where we will be running our wires and put in sufficient slack to cover the time period until the next maintenance window.

    If you are referring to weather event induced disruptions in the grid (wind/tornadoes/etc taking out power lines) then you build alternate paths to route around damage.

    If you are referring to solar storms and coronal mass ejections, then you need standards in your equipment to deal with out of spec distribution lines.

    All of which are technical problems and easy to solve.

    If you are referring to the bureaucratic hellscape that is international coordination and cooperation, then yes that is the only huge problem preventing such a solution, despite its numerous global economic and environmental advantages.


  • harmonization of grid standards is more than just frequency (it is mostly policy paperwork and the replacement of non-compliant equipment or the installation of conversion equipment) but you are correct high voltage DC is used for long distance power transmission. There are also details such as who is responsible for paying for what, where things are to be connected and various other bureaucratic details.