Hector Martin on Twitter: "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://t.co/CSbMQyR4mo… https://t.co/f7fR5FzhOd"

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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

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whitequark‏ @whitequark 26 Mar 2018

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"this may take a while" wordpic.twitter.com/f5J1Xuu77r

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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 …

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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

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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.

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whitequark‏ @whitequark 26 Mar 2018

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

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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.

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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.

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whitequark‏ @whitequark 26 Mar 2018

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

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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/ …

7:04 PM - 26 Mar 2018

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4 replies 4 retweets 17 likes

1. Hector Martin‏ @marcan42 26 Mar 2018
  
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  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.
  
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1. R. Ou‏ @rqou_ 26 Mar 2018
  
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  Not sure if better or worse than crossflashing Intel or Mellanox server-grade Ethernet adapters (the >=10G ones)
  
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