42 lines
1.4 KiB
Diff
42 lines
1.4 KiB
Diff
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Xose Vazquez Perez <xose.vazquez@gmail.com>
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Date: Sat, 23 Jul 2022 15:12:04 +0200
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Subject: [PATCH] multipath-tools: add basic info on how to use multipath-tools
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with NVMe devices
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Cc: Martin Wilck <mwilck@suse.com>
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Cc: Benjamin Marzinski <bmarzins@redhat.com>
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Cc: Christophe Varoqui <christophe.varoqui@opensvc.com>
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Cc: DM-DEVEL ML <dm-devel@redhat.com>
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Signed-off-by: Xose Vazquez Perez <xose.vazquez@gmail.com>
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Reviewed-by: Martin Wilck <mwilck@suse.com>
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Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
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---
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README.md | 16 ++++++++++++++++
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1 file changed, 16 insertions(+)
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diff --git a/README.md b/README.md
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index 2322082c..b05b1332 100644
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--- a/README.md
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+++ b/README.md
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@@ -174,3 +174,19 @@ To enable ALUA, the following options should be changed:
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- Huawei OceanStor:
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"Host Access Mode" should be changed to "Asymmetric".
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+
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+
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+NVMe
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+====
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+To use Device Mapper/multipath-tools with NVMe devices,
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+if the Native NVMe Multipath subsystem is enabled
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+( "Y" in `/sys/module/nvme_core/parameters/multipath` ),
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+it has to be disabled:
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+
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+`echo "options nvme_core multipath=N" > /etc/modprobe.d/01-nvme_core-mp.conf`,
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+regenerate the initramfs (`dracut -f` or `update-initramfs`) and reboot.
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+
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+Check that it is disabled(N) with:
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+`cat /sys/module/nvme_core/parameters/multipath`
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+or
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+`systool -m nvme_core -A multipath`
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