[linux-lvm] Error setting up a mirrored lv

[Laurenz, Dirk]

Hi,

i'm doing this:

>> hgest3301:~/LVM2.2.02.06 # lvcreate -m1 -n lvmirror -L 10G 
>> vgtest /dev/dm-55 /dev/dm-56
>>   Not enough PVs with free space available for parallel allocation.
>>   Consider --alloc anywhere if desperate.

here are the pvs?

>> hgest3301:~/LVM2.2.02.06 # pvs
>>   PV         VG          Fmt  Attr PSize   PFree
>>   /dev/dm-10 vgAGEST004  lvm2 a-    49.94G 25.94G
>>   /dev/dm-11 vgHGEST3901 lvm2 a-    49.94G     0
>>   /dev/dm-12 ehltest     lvm2 a-    25.00G 22.00G
>>   /dev/dm-13 vgtest      lvm2 a-    24.94G 24.94G
>>   /dev/dm-55 vgtest      lvm2 a-    99.94G 99.94G
>>   /dev/dm-56 vgtest      lvm2 a-    99.94G 99.94G
>>   /dev/dm-8  vgAGEST002  lvm2 a-    49.94G 45.94G
>>   /dev/dm-9  vgAGEST003  lvm2 a-    49.94G 43.94G
>>   /dev/sda8  vgOS        lvm2 a-    20.00G  3.00G
>>   /dev/sda9  vgBOTEST    lvm2 a-   111.25G 15.25G

what's wrong? 
Is there any documentation out there?
Why do we need three pvs? for a mirror?
Are there any other options?

Mit freundlichem Gruss,

Dirk Laurenz
Systems Engineer
S DE SE PS N/O
Fujitsu Siemens Computers GmbH
Hildesheimer Strasse 25
30880 Laatzen
Germany

Telephone:	+49 511 84 89 18 08
Telefax:	+49 511 84 89 25 18 08
Mobile:	+49 170 22 10 78 1 
Email:	mailto: dirk.laurenz at fujitsu-siemens.com
Internet:	http://www.fujitsu-siemens.com