Hi all,
Is this a bug ? When I do an lvchange to change the read/write
permission and then do the lvdisplay the changes are not reflected,
whereas the file in /etc/lvm/backup/testvg shows the permission changed
to read only. Other changes are reflected. ( I have checked with the
read ahead sectors )
Does this mean there is some inconsistency in the various metadata.
Where does lvdisplay and its family read the information from ?? Apart
from the disk and the files in /etc/lvm/backup or /etc/lvm/archive, is
there any other place where the metadata information is stored.
I have reproduced the operations performed and also the content of
/etc/lvm/backup/testvg.
Thanks in advance,
Sharad.
[root@volts root]# vgdisplay
--- Volume group ---
VG Name testvg
System ID volts1048777986
VG Access read/write
VG Status resizable
MAX LV 255
Cur LV 2
Max PV 255
Cur PV 2
VG Size 692.00 MB
PE Size 4.00 MB
Total PE 173
Alloc PE / Size 100 / 400.00 MB
Free PE / Size 73 / 292.00 MB
VG UUID NzLsW6-92uE-ssdu-wbl5-7w53-l6Gz-JrgM77
[root@volts root]# lvdisplay
--- Logical volume ---
LV Name /dev/testvg/testvol
VG Name testvg
LV UUID 000000-0000-0000-0000-0000-0000-000000
LV Write Access read/write
LV Status available
# open 0
LV Size 200.00 MB
Current LE 50
Segments 2
Allocation next free
Read ahead sectors 0
Block device 254:0
[root@volts root]# lvchange -p r /dev/testvg/testvol
Logical volume "testvol" changed
[root@volts root]# lvdisplay
--- Logical volume ---
LV Name /dev/testvg/testvol
VG Name testvg
LV UUID 000000-0000-0000-0000-0000-0000-000000
LV Write Access read/write
LV Status available
# open 0
LV Size 200.00 MB
Current LE 50
Segments 2
Allocation next free
Read ahead sectors 0
Block device 254:0
[root@volts root]# cat /etc/lvm/backup/testvg
# This file was originally generated by the LVM2 library
# Generated: Mon Mar 31 09:22:33 2003
description = "Created *after* executing 'lvchange -p r
/dev/testvg/testvol'"
creation_time = 1049082753
testvg {
id = "NzLsW6-92uE-ssdu-wbl5-7w53-l6Gz-JrgM77"
seqno = 0
status = ["RESIZEABLE", "READ", "WRITE"]
system_id = "volts1048777986"
extent_size = 8192 # 4 Megabytes
max_lv = 255
max_pv = 255
physical_volumes {
pv0 {
id = "5bMwLT-NYR2-Uzoy-pMPu-0pm1-FrvD-tyCYNr"
device = "/dev/hdb5" # Hint only
status = ["ALLOCATABLE"]
pe_start = 256
pe_count = 49 # 196 Megabytes
}
pv1 {
id = "U51jx4-8okp-SoV3-lygT-W2PT-xww4-Bp0fO2"
device = "/dev/hdb6" # Hint only
status = ["ALLOCATABLE"]
pe_start = 256
pe_count = 124 # 496 Megabytes
}
}
logical_volumes {
testvol {
id = "000000-0000-0000-0000-0000-0000-000000"
status = ["READ", "ALLOC_SIMPLE"]
read_ahead = 0
segment_count = 2
segment1 {
start_extent = 0
extent_count = 49 # 196 Megabytes
stripes = 1
areas = [
"pv0", 0
]
}
segment2 {
start_extent = 49
extent_count = 1 # 4 Megabytes
stripes = 1
areas = [
"pv1", 0
]
}
}
testvol_1 {
id = "000000-0000-0000-0000-0000-0000-000001"
status = ["READ", "WRITE", "ALLOC_SIMPLE"]
read_ahead = 0
segment_count = 1
segment1 {
start_extent = 0
extent_count = 50 # 200 Megabytes
stripes = 1
areas = [
"pv1", 1
]
}
}
}
}
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