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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. whitequark‏ @whitequark 26 Mar 2018
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      currently getting an error no one else appears to have described on the internet and whose http://kernel.org  description basically says "everything's fucked" do I have to pull out my ATA specification or whatpic.twitter.com/8qkAWNBgrI

      4 replies 2 retweets 22 likes
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    2. whitequark‏ @whitequark 26 Mar 2018
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      "this may take a while" wordpic.twitter.com/f5J1Xuu77r

      2 replies 1 retweet 15 likes
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    3. whitequark‏ @whitequark 26 Mar 2018
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      whitequark Retweeted Hector Martin

      annnd @marcan42 figures it out! it's a PCIe card I had with a Marvell 88SE9230 chip that does some really strange stuffhttps://twitter.com/marcan42/status/978424686995324928 …

      whitequark added,

      Hector Martin @marcan42
      Replying to @marcan42 @whitequark
      Maybe it's this broken Marvell nonsense? https://lists.ubuntu.com/archives/kernel-team/2016-February/072128.html …
      1 reply 0 retweets 14 likes
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    4. whitequark‏ @whitequark 26 Mar 2018
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      this PCIe card, mind you, SATA III 6 Gbps, in theory at least, offers you a way to switch between internal and external SATA ports. jumpers. routing the SATA data lanes around. I bet the signal integrity is 👌pic.twitter.com/aKMbjdlCGM

      3 replies 2 retweets 33 likes
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    5. Hector Martin‏ @marcan42 26 Mar 2018
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      Replying to @whitequark

      Let's just say I've had... not so great experiences with Marvell SATA/SAS controllers. I switched to an LSI SAS2008-based card for good reason. Marvell works... most of the time... if nothing goes wrong. Usually.

      1 reply 0 retweets 1 like
    6. whitequark‏ @whitequark 26 Mar 2018
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      Replying to @marcan42

      yyyyeah I'm probably going to return the SAS controller I bought from newegg without even unpacking it and get an LSI one instead

      1 reply 0 retweets 1 like
    7. Hector Martin‏ @marcan42 26 Mar 2018
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      Replying to @whitequark

      If you're going the LSI route, try to get a basic HBA with IT/IR firmware (or that you know for a fact can be crossflashed from iMR mode). Those usually work best. Avoid Dell PERC. IBM M1015 is usually fine (& cheap and available) but you'll want to crossflash it.

      2 replies 0 retweets 3 likes
    8. Hector Martin‏ @marcan42 26 Mar 2018
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      Replying to @marcan42 @whitequark

      TL;DR LSI sold the same chip with two completely different firmwares, PCI IDs, programming interfaces and drivers - one for full-blown hardware managed RAID (iMR) and one for a simple HBA (IT), optionally with basic RAID0/1 support (IR). You can switch with some effort.

      1 reply 0 retweets 4 likes
    9. whitequark‏ @whitequark 26 Mar 2018
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      Replying to @marcan42

      oh! yeah, I've already learned to avoid hardware RAID like Superfund sites.

      1 reply 0 retweets 5 likes
    10. Hector Martin‏ @marcan42 26 Mar 2018
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      Replying to @whitequark

      Here's my little horror story with a less-than-popular LSI card. These things work great once you get the right firmware on them, but getting there can be tricky depending on the model.https://marcan.st/2016/05/crossflashing-the-fujitsu-d2607/ …

      4 replies 4 retweets 17 likes
      Hector Martin‏ @marcan42 26 Mar 2018
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      Replying to @marcan42 @whitequark

      But really, if you get a card branded LSI SAS9211-8i you should be fine. Those should already use IT/IR mode firmware, both of which are probably fine as-is (IR does RAID but passes through unconfigured drives by default), and switching between those firmwares is easy.

      7:07 PM - 26 Mar 2018
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