[RndTbl] d-port daisychains and ryzen ecc
Trevor Cordes
trevor at tecnopolis.ca
Wed Feb 13 02:00:01 CST 2019
Oh ya, one more:
- NVMe SSD in M.2 (basically an SSD right on the PCIe bus) works great
in Linux, with a couple of gotchas:
- If you want to boot from it or use it in raid you need to tell
dracut to include the nvme modules and load them super early in the
boot process. Make a /etc/dracut.conf.d/nvme-before-raid.conf
with: force_drivers+="nvme-core nvme"
Without that your raid will assemble before nvme is availabe and
the nvme will be kicked from your raid every reboot.
- nvme drives are not /dev/sdX, they are /dev/nvme*. That means
tools (like scripts I've written, hehe) that expect names to be like
sda will not work without modification. Looks like the choice was
taken in the kernel to make these their own class of device rather
than pretend scsi like most disk interface out there. This has
subtle implications for things like smart, raid, sdparm, etc.
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