ISCI(4)

💖 ISCI(4) 💖

okay bestie, gather round, because we're talking about the isci driver — aka the Intel C600 Serial Attached SCSI driver — from the Kernel Interfaces Manual. yes it's a whole manual page. yes i made it cute. no cap. ✨

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🌸 NAME 🌸

isci — the Intel C600 Serial Attached SCSI driver, and she is serving storage realness 💅

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🦋 SYNOPSIS 🦋

so you wanna get this driver into your kernel? two options, both slay:

Option one, the "i'm built different" route — compile it straight into your kernel by dropping these lines into your kernel configuration file:

device scbus
device isci

Option two, the "low effort high reward" route — load it as a module at boot instead, by putting this line in loader.conf(5):

isci_load="YES"

either way, iconic. pick your fighter 🎀

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💜 HARDWARE 💜

the isci driver provides support for Intel C600 SAS controllers. that's the vibe check — that's literally what it does. 🫶

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✨ CONFIGURATION ✨

want to force legacy interrupts for all isci driver instances? bold move, but okay. set this tunable value in loader.conf(5):

hw.isci.force_legacy_interrupts=1

all instances. every single one. she said all. 😌

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🔥 DEBUGGING 🔥

want the isci driver to spill the tea — i mean, print debug output? set the

hw.isci.debug_level

variable to a value between 1 and 4 in loader.conf(5). that's the range, bestie, don't go rogue with it. 🌈

okay but here's the thing — the hardware layer in the isci driver has extensive logging capabilities, and they are disabled by default for performance reasons. like, she can talk, she just doesn't want to slow things down. 💀 to turn that logging on, add

options ISCI_LOGGING

to the kernel configuration file. now she's logging AND she's thriving. ✨

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👀 SEE ALSO 👀

go read these next, i promise they're worth it:

• cd(4)
• ch(4)
• da(4)
• pci(4)
• sa(4)
• scsi(4)

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📜 HISTORY 📜

the isci driver first appeared in FreeBSD 8.3 and 9.1. an elder. a legend. a pioneer. 👑

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🌟 AUTHORS 🌟

the isci driver was developed by Intel, and originally written by Jim Harris <jimharris@FreeBSD.org> — with contributions from Sohaib Ahsan and input from Scott Long <scottl@FreeBSD.org>. teamwork makes the dream work fr fr 🫶

this man page was written by Jim Harris <jimharris@FreeBSD.org>. he did the driver AND the docs. main character energy, honestly. 💅

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aaaand that's the whole page bestie!! 🎀 this lil beauty is from the Debian edition, dated January 23, 2012 — vintage, iconic, still relevant. mwah. 💖✨