Hello. Thank you for your email, I also try to volumes from the DellPowerstore to DellSC then volume id match between Horizon and Dell SC but old volume won't clear on Powerstore, I just informed you. I will investigate and let you know. Thank you. Nguyen Huu Khoi On Tue, Dec 27, 2022 at 6:04 AM Alan Bishop <abishop@redhat.com> wrote:

On Mon, Dec 26, 2022 at 7:00 AM Nguyễn Hữu Khôi <nguyenhuukhoinw@gmail.com> wrote:

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Hello guys, I have a problem with cinder:

I use cinder volume retype to move my volume to another backend. It worked but when I check on new backend, volume id doest match with id which on Horizon dash board.It expects to have same volume id on Horizon and new backend. I use DellSC and DellPowerstore.

I'm guessing you are migrating volumes from the DellSC to the DellPowerstore, in which case the problem is that the DellPowerstore driver doesn't implement the update_migrated_volume method. Here is an extract from [1] on the purpose of that function:

"This method can be used in a generally wide range, but the most common use case covered in this method is to rename the back-end name to the original volume id in your driver to make sure that the back-end still keeps the same id or name as it is before the volume migration"

[1] https://docs.openstack.org/cinder/latest/contributor/migration.html

You might file a bug against the Powerstore driver. This is something that Dell EMC would need to investigate.

Alan

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Thank you.

Nguyen Huu Khoi