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Joined 3 years ago
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Cake day: August 6th, 2023

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    1. Don’t sync anything to icloud you wouldn’t want the government being able to get it or generally want to keep private.
    2. Go through privacy settings, especially location settings and check what you’re allowing including system services, adjust as you feel comfortable while still meeting your needs.
    3. Pay attention to what apps you’re installing. Most profiling data is not sold by say Google directly off your phone but based off ad-networks incorporated in third party apps you install. The app store has a scorecard on all apps showing you how much if at all they profile and spy on you, make use of it, make wise choices, don’t install bad apps.
    4. Install a privacy respecting adblocker to help limit tracking while using the web browser
    5. Limit permissions for apps. If you must use an app that has location tracking consider only allowing it while you’re using the app, this may have implications for some extended functionality like updating while in the background or via Apple’s little info tiles.
    6. Disable siri or limit it, turn off “hey siri” mode in settings.
    7. Enable lock-down mode (this is an extreme step and will result in some loss of functionality, Apple details the implications themselves so take a look at their page on it before doing so)
    8. Disable radios such as bluetooth and wifi while outside your house to prevent any possibility of their use in tracking you. You can actually make a “Shortcut” using app of the same name from Apple to automate this anytime you leave home and I believe there are existing ones you can find if you search around.

    Apple phones are fairly private as long as you don’t use icloud for anything sensitive, apply common sense privacy settings, and pay attention to what apps you install and what permissions you give. Also don’t send them crash or debugging data as that can contain personal info potentially so uncheck that option.


  • CMR performs better under all workload types.

    Shingled Magnetic Recording overlays the tracks on top of each other like roof shingles. This means you can fit more tracks on the same platter which means you can fit more data. Unfortunately this also means whenever writing data you have to rewrite tracks adjacent to the track you’re rewriting which leads to a lot of reshuffling of data which leads to very slow writes when this is taking place (say you edit a file or replace it, delete some and copy over others).

    SMR allows more storage for less money but it takes a serious performance hit (right now about the largest CMR disks you can get as an example are about 28TB in size, by contrast you can get 40TB SMR disks so it can significantly amplify storage). It shouldn’t be used for many scenarios. For archival backup it’s fine. For disks that are having data changed on them anywhere near regularly it’s not great.

    I want to underline that for USB powered portable 5200RPM disks they’re already slower disks when CMR, so as SMR they get a lot slower in write performance (one I had would drop down to sustained low 20MB/s write speeds when over 60% full). A 7200RPM SMR disk with proper 12V power from a PSU rail or an AC adapter would likely be double that at worst by contrast.

    So SMR has its uses, it has its place. It’s just a lot of people who don’t know might use it in places where CMR is more appropriate and would give them a better experience. So by all means if you’re using SMR in back-up disks to your primary ones to create back-up snapshots that are updated infrequently continue to do so, they’re fine for that especially if the tasks are done on machines that can be left running for days while the data is slowly written.