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From: David Teigland <teigland@redhat.com>
To: Zhiyong Ye <yezhiyong@bytedance.com>
Cc: LVM general discussion and development <linux-lvm@redhat.com>
Subject: Re: [linux-lvm] How to convert a single path to a multipath after using dm-multipath
Date: Tue, 11 Apr 2023 08:31:48 -0500	[thread overview]
Message-ID: <20230411133147.GB27598@redhat.com> (raw)
In-Reply-To: <ac0f39c8-932d-293a-b7aa-568532bda22a@bytedance.com>

On Tue, Apr 11, 2023 at 01:29:42PM +0800, Zhiyong Ye wrote:
> and lv on it. I then turn on the multipath function and merge the two paths
> into a new device (/dev/mapper/matha), and I get the following error when I
> execute the lvm command.
> 
> # pvs
> WARNING: Not using device /dev/mapper/matha for PV
> HgL3xR-qTio-m75Q-nGAO-Un0U-8uHk-wHbH25.
> WARNING: PV HgL3xR-qTio-m75Q-nGAO-Un0U-8uHk-wHbH25 prefers device /dev/sda
> because device is used by LV.
> PV           VG                      Fmt  Attr PSize  PFree
> /dev/sda     is-he57e6mr4wemb19kgf8i lvm2 a--  10.00t 9.98t

> May you please advise how one can convert the pv used by vg from sda to
> matha without affecting the current lv usage.

lvchange --refresh should refresh the active LV to use mpatha.  To avoid
this, you might configure mpath on sda alone prior to adding the second
path.

Dave
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  reply	other threads:[~2023-04-11 13:33 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-04-11  5:29 [linux-lvm] How to convert a single path to a multipath after using dm-multipath Zhiyong Ye
2023-04-11 13:31 ` David Teigland [this message]
2023-04-12  9:16   ` Zhiyong Ye
2023-04-13 10:54     ` Giorgio Bersano
2023-04-14  3:48       ` Zhiyong Ye
2023-04-13 20:28     ` David Teigland
2023-04-14  3:55       ` Zhiyong Ye

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