[linux-lvm] LVM-0.9 Touble in pvcreate
Soete Joel
joel.soete at freebel.net
Fri Dec 29 17:23:08 UTC 2000
Hello LVM - guy,
Being an system engineer who appreciate the facilities of managment
which brings LVM into HPUX systems, I try to test your last
implementation(0.9).
But I loose Linux-2.4.0-test10 also I spend time to include youe patches
into Linux-2.4.0-test12.
I submitted to your relivant opignon as I am not sure of the result. I
compile a kernel with LVM modular options and seems to work but not yet
fine.
I am working on a 'potato Debian distribution (2.2_r0)'.
And I would like to submit you some test results which are strange:
I first create two disk partition of 10Mb [actualy 8.23Mb] (hda24,
hda25) with cfdisk. And the result was:
cfdisk 2.10f
Disk Drive: /dev/hda
Size: 15020457984 bytes
Heads: 255 Sectors per Track: 63 Cylinders: 1826
Name Flags Part Type FS Type [Label]
Size (MB)
------------------------------------------------------------------------------
hda16 Logical Linux
ext2 65.81
hda17 Logical Linux
ext2 16.46
hda18 Logical Linux
ext2 65.81
hda19 Logical Linux
ext2 16.46
hda20 Logical Linux ext2
962.36
hda21 Logical Linux ext2
131.61
hda22 Logical Linux ext2
748.51
hda23 Logical Linux ext2
2048.10
Logical Free Space
5708.35
hda24 Logical
Linux 8.23
hda25 Logical
Linux 8.23
Then I create pseudo devices:
% mknod /dev/hda24 b 3 24
% mknod /dev/hda25 b 3 25
% ls /dev/hda24 /dev/hda25
brw-r--r-- 1 root root 3, 24 Dec 29 14:51 /dev/hda24
brw-r--r-- 1 root root 3, 25 Dec 29 14:51 /dev/hda25
OK?
Reboot (I do not yet find another way to make know the new partions to
the kernel)
Now following LVM-HOWTO (corresponding to HP experience excepted that HP
consider only an all disk):
% pvcreate /dev/hda24
But what is my surprise with a partition of about 8Mb pvcreate a
phisycal volume of 62Mb???
% pvdisplay /dev/hda24
pvdisplay -- getting physical volume size
--- Physical volume ---
PV Name /dev/hda24
VG Name test_vg
PV Size 62.72 MB / NOT usable 2.72 MB [LVM: 121 KB]
PV# 1
PV Status available
Allocatable yes
Cur LV 1
PE Size (KByte) 4096
Total PE 15
Free PE 13
Allocated PE 2
PV UUID MB5eIp-jxvc-4pup-ncSM-O6xT-fMmu-JjYgzM
What do I wrong?
Thanks in adavance for help,
Joel
PS: I countinue the rest of the test as follow and all seems coherent
with those result:
% vgcreate test_vg /dev/hda24
% vgdisplay test_vg
--- Volume group ---
VG Name test_vg
VG Access read/write
VG Status available/resizable
VG # 0
MAX LV 256
Cur LV 1
Open LV 1
MAX LV Size 255.99 GB
Max PV 256
Cur PV 1
Act PV 1
VG Size 60 MB
PE Size 4 MB
Total PE 15
Alloc PE / Size 2 / 8 MB
Free PE / Size 13 / 52 MB
VG UUID CBKdMh-Nk1S-Z4l0-qldN-r3Jq-gSAn-IWbqaT
% lvcreate -L5 -ntest_lv1 test_vg
% lvdisplay /dev/test_vg/test_lv1
--- Logical volume ---
LV Name /dev/test_vg/test_lv1
VG Name test_vg
LV Write Access read/write
LV Status available
LV # 1
# open 1
LV Size 8 MB
Current LE 2
Allocated LE 2
Allocation next free
Read ahead sectors 120
Block device 58:0
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