Xen users - May 2007 - getting a disk file to SR, mount SR-disk, maintenance

dear list,

i''m new in working with xen and want to setup a vm from an existing
disk image (disk-file from other xen host).

1) i''vn got much disk space on system disk and want do copy the
xen-disk image directly to storage repository (where is enough free space)

I''ve thought:
* mounting disk-file over nfs from other server. (like other iso''s)
* creating a new vm in management-interface to getting the device & mapping
infos to SR
* making a dd if=/nfsvol/diskimg of=/dev/mapper/VG_XenSxxxx.disk 

have you got any ideas? whats the best way to do this?

2) how can i mount an SR- disk (/dev/mapper/VG_XenS..sda) on the xen server
dom0?

3) maintenance: is there a way for onlinebackup?, or any scripts für shutdown,
clone, start - commands? where can i find additional infos about such
maintenance jobs?

regards from austria,
josy



additional infos xenserver: 
Release 3.2.0
default setup from (xensource-iso)

Linux xen-dmz 2.6.16.38-xs3.2.0.531.3960xen #1 SMP Sat Mar 24 17:19:06 EDT 2007
i686 i686 i386 GNU/Linux
[root@xen-dmz .ssh]# df -kh
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda1             3.8G  2.0G  1.7G  54% /
none                  257M     0  257M   0% /dev/shm
/dev/mapper/VG_XenStorage--7eae50ed--8337--4e5c--bcd6--beccf54fcb1a-SRM
                      2.0G   65M  1.9G   4%
/SR-7eae50ed-8337-4e5c-bcd6-beccf54fcb1a/SRM

# lvdisplay
  --- Logical volume ---
  LV Name               
/dev/VG_XenStorage-7eae50ed-8337-4e5c-bcd6-beccf54fcb1a/SRM
  VG Name                VG_XenStorage-7eae50ed-8337-4e5c-bcd6-beccf54fcb1a
  LV UUID                XdFRbI-Y0PH-z3QI-ICrY-Kiqs-2TUx-uiglwh
  LV Write Access        read/write
  LV Status              available
  # open                 1
  LV Size                2.00 GB
  Current LE             512
  Segments               1
  Allocation             inherit
  Read ahead sectors     0
  Block device           253:0

  --- Logical volume ---
  LV Name               
/dev/VG_XenStorage-7eae50ed-8337-4e5c-bcd6-beccf54fcb1a/LV-9ef86e52-723b-4ba6-b0d6-a64b90af9be3.sda
  VG Name                VG_XenStorage-7eae50ed-8337-4e5c-bcd6-beccf54fcb1a
  LV UUID                2UMiDS-8Rlx-QVuE-2sKH-4nWk-xbyO-AHRB39
  LV Write Access        read/write
  LV Status              available
  # open                 1
  LV Size                10.00 GB
  Current LE             2560
  Segments               1
  Allocation             inherit
  Read ahead sectors     0
  Block device           253:1


[root@xen-dmz VG_XenStorage-7eae50ed-8337-4e5c-bcd6-beccf54fcb1a]# ls -al
drwxr-xr-x  11 root root 17540 May 10 14:46 ..
lrwxrwxrwx   1 root root   116 May  4 12:51
LV-9ef86e52-723b-4ba6-b0d6-a64b90af9be3.sda ->
/dev/mapper/VG_XenStorage--7eae50ed--8337--4e5c--bcd6--beccf54fcb1a-LV--9ef86e52--723b--4ba6--b0d6--a64b90af9be3.sda

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