| Bentech |
04-22-2014 03:31 PM |
LVM Problem
Hi,
I've been having some problems with my LVM disk array.
First off i was suspecting a failing hard disk
Code:
smartctl /dev/sde
# 1 Extended offline Completed: read failure 90% 4861 280578
# 2 Short offline Completed: read failure 90% 4860 28055778
# 3 Extended offline Completed: read failure 90% 4860 2805778
I tried correcting this with
Code:
dd if=/dev/zero of=/dev/sde conv=sync bs=4096 count=1 seek=2805778
Repeated till there were no more errors.
I tried mounting the disk but it still had errors. e.g. Input/Output error when trying ls in the directory. (I could access roughly half my files)
--
I was looking around and noticed my other disk /dev/sdf didn't have a partition label.
Code:
Error: Unable to open /dev/sdf - unrecognised disk label.
I Know This Was A Mistake Now But I corrected it with:
Code:
parted /dev/sdf
mklabel gpt
This cleared my lvm info.
I restored it with?
Code:
parted
mkpart primary 0 3000000
set 1 boot on
This made my partition appear again.
I assumed everything was okay as it let me mount my lvm array again.
I knew there were problems with the disk so i preformed
Code:
fsck -C -f -y /dev/LVM_SATA/dvd
I Left this going overnight.
I came back to find half my files missing!
I unmounted the LVM.
I have now tried restoring the LVM from a backup i had made before it all went wrong.
I then restored it with
Code:
pvcreate --uuid I11Uen-ra92-OEt0-h9LZ-Dj9z-l03m-WKapaG --restorefile ./LVM_SATA /dev/sdf1
Now mount gives
Code:
mount: special device /dev/LVM_SATA/dvd does not exist
Code:
sudo blkid/dev/sda1: UUID="IPVKAZ-RO2D-ss8d-OXe7-Pr2r-pJ21-sSlV02" TYPE="LVM2_member"
/dev/sda2: UUID="9hzH98-3Y3S-BY31-bTKO-2W3k-xQxq-jsa3FH" TYPE="LVM2_member"
/dev/sdb1: UUID="fa2fd5bd-39a0-423b-b2e3-55cb228280b1" TYPE="ext4"
/dev/sdb5: UUID="2c4f1c2a-d9cb-487c-a8f7-2836ca3452eb" TYPE="swap"
/dev/sdc1: UUID="z32Xx8-lXBh-1Rr0-XldC-0RCr-geG6-fe8ow2" TYPE="LVM2_member"
/dev/sdd1: UUID="9EjM3Z-igOx-I8P5-mdW2-hkdp-iieI-e2uJzo" TYPE="LVM2_member"
/dev/sde1: UUID="gYDc1O-333e-5eoh-yl4n-FfgW-UBlq-4XK3TL" TYPE="LVM2_member"
/dev/sdf1: UUID="I11Uen-ra92-OEt0-h9LZ-Dj9z-l03m-WKapaG" TYPE="LVM2_member"
Code:
cat ./LVM_SATA
# Generated by LVM2 version 2.02.66(2) (2010-05-20): Tue Apr 22 08:39:34 2014
contents = "Text Format Volume Group"
version = 1
description = "vgcfgbackup -f /root/LVM_SATA LVM_SATA"
creation_host = "mythserver.local" # Linux mythserver.local 3.8.0-35-generic #52~precise1-Ubuntu SMP Thu Jan 30 17:27:28 UTC 2014 i686
creation_time = 1398152374 # Tue Apr 22 08:39:34 2014
LVM_SATA {
id = "xCkZNm-PyI0-3ANq-PRkR-OEk2-Xcmm-CK3L90"
seqno = 48
status = ["RESIZEABLE", "READ", "WRITE"]
flags = []
extent_size = 8192 # 4 Megabytes
max_lv = 0
max_pv = 0
physical_volumes {
pv0 {
id = "9EjM3Z-igOx-I8P5-mdW2-hkdp-iieI-e2uJzo"
device = "/dev/sdd1" # Hint only
status = ["ALLOCATABLE"]
flags = []
dev_size = 2930272002 # 1.36451 Terabytes
pe_start = 384
pe_count = 357699 # 1.36451 Terabytes
}
pv1 {
id = "gYDc1O-333e-5eoh-yl4n-FfgW-UBlq-4XK3TL"
device = "/dev/sdg1" # Hint only
status = ["ALLOCATABLE"]
flags = []
dev_size = 2930272002 # 1.36451 Terabytes
pe_start = 384
pe_count = 357699 # 1.36451 Terabytes
}
pv2 {
id = "z32Xx8-lXBh-1Rr0-XldC-0RCr-geG6-fe8ow2"
device = "/dev/sdc1" # Hint only
status = ["ALLOCATABLE"]
flags = []
dev_size = 3907026560 # 1.81935 Terabytes
pe_start = 384
pe_count = 476931 # 1.81935 Terabytes
}
pv3 {
id = "9hzH98-3Y3S-BY31-bTKO-2W3k-xQxq-jsa3FH"
device = "/dev/sda2" # Hint only
status = ["ALLOCATABLE"]
flags = []
dev_size = 882269824 # 420.699 Gigabytes
pe_start = 384
pe_count = 107698 # 420.695 Gigabytes
}
pv4 {
id = "IPVKAZ-RO2D-ss8d-OXe7-Pr2r-pJ21-sSlV02"
device = "/dev/sda1" # Hint only
status = ["ALLOCATABLE"]
flags = []
dev_size = 2048004096 # 976.564 Gigabytes
pe_start = 384
pe_count = 250000 # 976.562 Gigabytes
}
pv5 {
id = "I11Uen-ra92-OEt0-h9LZ-Dj9z-l03m-WKapaG"
device = "/dev/sdf1" # Hint only
status = ["ALLOCATABLE"]
flags = []
dev_size = 5860532784 # 2.72902 Terabytes
pe_start = 384
pe_count = 715397 # 2.72902 Terabytes
}
}
logical_volumes {
dvd {
id = "M8Nxb5-OfH1-iOiq-Q2Wr-1cHa-hqAz-vwXcIa"
status = ["READ", "WRITE", "VISIBLE"]
flags = []
segment_count = 6
segment1 {
start_extent = 0
extent_count = 357699 # 1.36451 Terabytes
type = "striped"
stripe_count = 1 # linear
stripes = [
"pv0", 0
]
}
segment2 {
start_extent = 357699
extent_count = 357699 # 1.36451 Terabytes
type = "striped"
stripe_count = 1 # linear
stripes = [
"pv1", 0
]
}
segment3 {
start_extent = 715398
extent_count = 476931 # 1.81935 Terabytes
type = "striped"
stripe_count = 1 # linear
stripes = [
"pv2", 0
]
}
segment4 {
start_extent = 1192329
extent_count = 107698 # 420.695 Gigabytes
type = "striped"
stripe_count = 1 # linear
stripes = [
"pv3", 0
]
}
segment5 {
start_extent = 1300027
extent_count = 250000 # 976.562 Gigabytes
type = "striped"
stripe_count = 1 # linear
stripes = [
"pv4", 0
]
}
segment6 {
start_extent = 1550027
extent_count = 715397 # 2.72902 Terabytes
type = "striped"
stripe_count = 1 # linear
stripes = [
"pv5", 0
]
}
}
}
}
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