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marcan42's profile
Hector Martin
Hector Martin
Hector Martin
@marcan42

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Hector Martin

@marcan42

If it ain't broke, I'll fix it! I'm porting Linux to Apple Silicon Macs at @AsahiLinux. http://patreon.com/marcan  | http://github.com/sponsors/marcan 

Tokyo, Japan
marcan.st
Joined May 2009

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    1. Hector Martin‏ @marcan42 14 Oct 2018
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      • Report NetzDG Violation

      Exhibit A: Hardware RAID5. Exhibit B: Software RAID5. Same controller, same disks. Seriously, fuck hardware RAID.pic.twitter.com/EsIurJpKlQ

      16 replies 46 retweets 140 likes
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    2. Hector Martin‏ @marcan42 14 Oct 2018
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      And yes this is a cheap controller with no cache, but that's no excuse for that abysmal and not even consistent linear write performance. I'm sure there's some stupid underlying pathological cause for this, but I don't care. Software RAID works without any of this nonsense.

      7 replies 2 retweets 35 likes
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    3. Mike Ryan‏ @mpeg4codec 14 Oct 2018
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      Replying to @marcan42

      What kind of CPU load does that software RAID benchmark generate?

      1 reply 0 retweets 0 likes
      Hector Martin‏ @marcan42 14 Oct 2018
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      Replying to @mpeg4codec

      2% software RAID, 4% hardware RAID. Don't ask me how that's possible, it just is. I presume driver shittiness vastly overshadows the overhead of software parity calculation (which is so fast on modern CPUs as to be basically free).

      12:25 PM - 14 Oct 2018
      1 reply 0 retweets 0 likes
        1. Mike Ryan‏ @mpeg4codec 14 Oct 2018
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          Replying to @marcan42

          Essentially noise compared to dm-crypt overhead. No reason not to software RAID anymore.

          0 replies 0 retweets 0 likes
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