Re: NetBSD DOMU Xen 4.2 xl lvm disk

[Harry Waddell <waddell%caravan-epub.com@localhost>]

On Fri, 2 Aug 2013 23:16:03 +0100
Patrick Welche <prlw1%cam.ac.uk@localhost> wrote:

> I had a working NetBSD DOMU Xen 4.2 xl using a vnd as a disk. I thought
> I would try out lvm for the first time, but I get
> 
>   xenbus: can't get state for device/suspend/event-channel (2)
> 
> which was an issue in an earlier thread of the same name - except here
> I think that the volume is accessible...
> 
> # more quantz.cfg 
> name = "quantz"
> kernel = "/usr/pkg/etc/xen/quantz/netbsd-XEN3_DOMU.gz"
> vcpus = 1
> memory = 512
> disk = ['phy:/dev/vg0/quantz,hda,w']
> vif = ['bridge=bridge0']
> on_reboot = 'restart'
> on_crash = 'destroy'
> # lvm lvdisplay
>   --- Logical volume ---
>   LV Name                /dev/vg0/quantz
>   VG Name                vg0
>   LV UUID                Hxsogk-cGeo-Yrrp-V0HU-KFUo-Aec5-99tHwg
>   LV Write Access        read/write
>   LV Status              available
>   # open                 0
>   LV Size                20.00 GiB
>   Current LE             5120
>   Segments               1
>   Allocation             inherit
>   Read ahead sectors     auto
>   - currently set to     0
>   Block device           169:1
> # xl list
> Name                                        ID   Mem VCPUs      State   
> Time(s)
> Domain-0                                     0   512     1     r-----    
> 1111.3
> quantz                                       8   512     1     -b----       
> 1.1
> # xl block-list 8
> Vdev  BE  handle state evt-ch ring-ref BE-path                       
> 768   0   8      3     6      511      /local/domain/0/backend/vbd/8/768
> # ps axw | grep xen
>  1371 ?       Il    0:00.14 /usr/pkg/sbin/xenconsoled 
>  5327 ?       I     0:00.49 /usr/pkg/sbin/xenstored --pid-file 
> /var/run/xenstored.pid 
> 14733 ttyp0   Il+   0:00.00 /usr/pkg/bin/xenconsole --num 0 --type pv 8 
>   883 xencons Is+   0:00.00 /usr/libexec/getty Pc console 
> 
> (I tried running xenbackend too just in case, but isn't it replaced by
> xenstored in the new world of xl?)
> 
> Is that the right "disk=" syntax?
> 
> Cheers,
> 
> Patrick
> 

logical volumes work fine. 

Try /dev/mapper/vg0-quantz instead. Also, make sure the lv is available, i.e. 
has attr "-wi-a-" when you run "lvm lvs" and if not use 
"lvm lvchange -a y vg0/quantz".

Harry Waddell