2 x NVMe showing up as 1 Multipath Device

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SolaDrive
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2 x NVMe showing up as 1 Multipath Device

Post by SolaDrive » 2021/08/23 21:48:38

We have an issue with 2 x nvme showing up in the installer as 1 drive/device

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We tried formatting and clearing both drives, tried both 7 and 8 versions, but the issue remains. What is causing this?

Motherboard: X570D4U
Drives: XPG SX8100 4TB M.2
Last edited by SolaDrive on 2021/08/23 22:08:24, edited 1 time in total.

tunk
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Re: 2 x NVMe showing up as 1 Multipath Device

Post by tunk » 2021/08/23 21:55:00

Don't know what the problem is, but it may help if you say
what motherboard, chipset etc. you have. There may also
be some settings in the bios.

SolaDrive
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Re: 2 x NVMe showing up as 1 Multipath Device

Post by SolaDrive » 2021/08/23 22:08:49

Thanks, I have updated the original post with this info.

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TrevorH
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Re: 2 x NVMe showing up as 1 Multipath Device

Post by TrevorH » 2021/08/23 22:17:26

I'd run hdparm/smartctl against each drive in turn and compare things like the serial numbers. It sounds to me like you might have two drives that claim to have the same one perhaps?
The future appears to be RHEL or Debian. I think I'm going Debian.
Info for USB installs on http://wiki.centos.org/HowTos/InstallFromUSBkey
CentOS 5 and 6 are deadest, do not use them.
Use the FAQ Luke

George99
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Re: 2 x NVMe showing up as 1 Multipath Device

Post by George99 » 2021/08/24 00:48:45

If you remove any one of the two does the orher drive show up?

SolaDrive
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Re: 2 x NVMe showing up as 1 Multipath Device

Post by SolaDrive » 2021/08/24 02:15:32

Yes, they both work fine on their own. I think this relates to the reported bug which looks like has been around for over a year with no fix yet: https://bugs.centos.org/view.php?id=16893

If so many people are unable to use nvme drives, how have they not fixed this yet then?

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TrevorH
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Re: 2 x NVMe showing up as 1 Multipath Device

Post by TrevorH » 2021/08/24 09:15:51

Well... it's not fixed yet at least partly because it's reported in the wrong bug tracker. Bugs reported on bugs.c.o are only useful if you're reporting something like $package is missing or $package does not match the RHEL copy. For anything else, a problem has to be reported to Red Hat via bugzilla.redhat.com in order for anyone to do anything with it.

Did you look at the serial numbers?
The future appears to be RHEL or Debian. I think I'm going Debian.
Info for USB installs on http://wiki.centos.org/HowTos/InstallFromUSBkey
CentOS 5 and 6 are deadest, do not use them.
Use the FAQ Luke

SolaDrive
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Re: 2 x NVMe showing up as 1 Multipath Device

Post by SolaDrive » 2021/08/24 17:49:59

TrevorH wrote:
2021/08/24 09:15:51
Did you look at the serial numbers?
We didn't but we instead replaced one of the drives with a new identical drive...same issue. We then replaced both drives with a different model, and they both showed up fine. So seems like its firmware or kernel related for these devices?

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TrevorH
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Re: 2 x NVMe showing up as 1 Multipath Device

Post by TrevorH » 2021/08/24 18:08:34

Check the serial numbers.
The future appears to be RHEL or Debian. I think I'm going Debian.
Info for USB installs on http://wiki.centos.org/HowTos/InstallFromUSBkey
CentOS 5 and 6 are deadest, do not use them.
Use the FAQ Luke

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