Port-xen archive
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Old Index]
Re: Xen DomU zvol disk sizes
●To: port-xen%netbsd.org@localhost
●Subject: Re: Xen DomU zvol disk sizes
●From: Sebastian <sebastian%xenoserver.net@localhost>
●Date: Fri, 19 Dec 2025 10:38:36 +0100
Am 2025-12-18 19:39, schrieb Sebastian:
If I now create a zvol with 10G size and start a NetBSD 10.1 (PV mode)
the zvol appears in the DomU, but the disk size inside the DomU is only
25% (2^2??). I tried with different zvol blockvolsizes but without any
effect.
There is the configuration I tried:
Create a new zvol:
zfs create -p -V 16G zredpool/test
newfs -O2 /dev/zvol/rdsk/zredpool/test
zfs list:
NAME USED AVAIL REFER MOUNTPOINT
zredpool/test 16.5G 322G 3.24M -
The Xen DomU disk spec looks like this:
disk = [
'format=raw, vdev=xvda,
target=/zredpool/xenstore/test/root.img',
'vdev=xvdb, target=/dev/zvol/dsk/zredpool/test'
]
But in my DomU guest I get
[ 1.9800368] xbd0 at xenbus0 id 51712: Xen Virtual Block Device
Interface
[ 1.9903955] xbd1 at xenbus0 id 51728: Xen Virtual Block Device
Interface
[ 1.9903955] xbd0: 10240 MB, 512 bytes/sect x 20971520 sectors
[ 1.9903955] xbd0: backend features 0x1<CACHE-FLUSH>
[ 1.9903955] unknown type vkbd at xenbus0 id 0 not configured
[ 1.9903955] unknown type vfb at xenbus0 id 0 not configured
[ 1.9903955] xbd1: 2048 MB, 512 bytes/sect x 4194304 sectors
[ 1.9903955] xbd1: backend features 0x1<CACHE-FLUSH>
When I try to mount the pre-formatted xbd1 it fails because of incorrect
super block size. I also see the same "wrong" disk size in linux DomUs.
Best regards,
Sebastian
●Follow-Ups:
●Re: Xen DomU zvol disk sizes
●From: Michael van Elst
●Re: Xen DomU zvol disk sizes
●From: Greg Troxel
●References:
●Xen DomU zvol disk sizes
●From: Sebastian
●Prev by Date:
Re: Xen DomU zvol disk sizes
●Next by Date:
Re: Xen DomU zvol disk sizes
●Previous by Thread:
Re: Xen DomU zvol disk sizes
●Next by Thread:
Re: Xen DomU zvol disk sizes
●Indexes:
●
reverse Date
●
reverse Thread
●
Old Index
Home |
Main Index |
Thread Index |
Old Index