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Re: How to properly resize VG/LV on LVM?

On 03.08.2020 12:10, Bartosz Maciejewski wrote:

I got logical volume for mailboxes on LVM for easy expanding as mailboxes are growing. However I can't really resize it, or I don't know how to do it on NetBSD.

Actually it is done the same anywhere. You have to enlarge every device
in the chain.

Filesystem                            Size       Used Avail %Cap Mounted on
/dev/mapper/varmailvg-virtuallv       984G       860G 74G  92% /var/mail/virtual

xbd3: 1200 GB, 512 bytes/sect x 2516582400 sectors
# lvm pvresize /dev/rxbd3a

It seems your PV is located on NetBSD slice of xbd3, not on xbd3 itself. That means you have to enlarge slice using disklabel(8) first.

which looks good, but lvm pvs still shows 1000GB instead of 1200GB

# lvm pvs
   PV          VG        Fmt  Attr PSize    PFree
   /dev/rxbd3a varmailvg lvm2 a-   1000.00g 1020.00m

Probably I should "resize in place" with disklabel or fstab after extending in Xen but I don't know exactly how. There is also resize_ffs somewhere in a process I think.

Is there any guide for NetBSD how to properly extend lvm volume?

This job is always very local, I don't think one can create sufficient
documentation to cover all the possible options. However big document
can be found here

Sincerely yours,
Dima Veselov
Physics R&D Establishment of Saint-Petersburg University

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