From: David Teigland <teigland@redhat.com>
To: lvm-devel@redhat.com
Subject: Need assistance
Date: Tue, 31 Jan 2023 09:55:29 -0600 [thread overview]
Message-ID: <20230131155529.GA16839@redhat.com> (raw)
In-Reply-To: <CAJreVFygf+13+2PM5wYkDQAxyzVDd=nCiP=P4nhi18bUY=W4mQ@mail.gmail.com>
On Mon, Jan 30, 2023 at 06:07:03PM +0530, Gk Gk wrote:
> Hi All,
>
>
> I have two nvme disks with different sector sizes of 512 and 4096
> respectively. When I try
> to use them in creating a volume group, it is complaining to set the
> 'allow_mixed_block_sizes' option in lvm.conf file. But I read elsewhere
> that doing this would corrupt data.
>
> Can anyone explain to me under what specific case/cases will I loose data
> if I allow mixed blocked sizes ?
If an LV is using one disk, then there is clearly no problem. If an LV is
using both disks, then we don't know all the issues that might appear --
linear/striped will be fine, but we've seen problems with cache,
writecache, snapshot. Avoid pvmove or something where the disk under a
logical block might change.
prev parent reply other threads:[~2023-01-31 15:55 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-30 12:37 Need assistance Gk Gk
2023-01-31 15:55 ` David Teigland [this message]
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