[linux-lvm] LVM2 [lvcreate --type raid5] issue
James Woolliscroft
j_woolliscroft at hotmail.com
Sun Feb 2 19:53:50 UTC 2014
Hi
New to Linux, not sure if this is a legitimate fault, or if I am doing
something wrong. Please can you advise on which release of LVM2 (if any)
fixes this issue.
Initially tested using SL6.4, now testing with SL6.5. I have used both
LiveDVD and basic "Minimal Desktop" Installations on the target computer and
inside a VirtualBox Virtual Machine.
I am preparing to install SL6.5 on a small system with 3x750GB Disks. As a
pre-requisite, I wish to testing the performance of the disks using
different chunk/block sizes using LVM2 RAID5.
It is a preference to use LVM2 RAID5 rather than mdraid and LVM2 to reduce
the complexity of setting up and managing the system.
However I am experiencing a problem when creating the Logical Volume. This
issue occurs with both SL6.4 and SL6.5:
/dev/vg_system1/lv_system1: read failed after 0 of 4096 at 0: Input/output
error
/dev/vg_system1/lv_system1: write failed after 0 of 4096 at 0:
Input/output error
There was one additional issue with SL6.4 which also appears to be partially
resolved in SL6.5. Certain commands function without an issue, however once
the issue manifests, it appears in most or all commands:
[root at localhost ~]# pvscan -vd
Wiping cache of LVM-capable devices
Wiping internal VG cache
Walking through all physical volumes
/dev/vg_system1/lv_system1: read failed after 0 of 4096 at 5368643584:
Input/output error
/dev/vg_system1/lv_system1: read failed after 0 of 4096 at 5368700928:
Input/output error
/dev/vg_system1/lv_system1: read failed after 0 of 4096 at 0: Input/output
error
/dev/vg_system1/lv_system1: read failed after 0 of 4096 at 4096:
Input/output error
/dev/vg_system1/lv_system1: read failed after 0 of 4096 at 0:
Input/output error
PV /dev/sdb1 VG vg_system1 lvm2 [16.00 GiB / 13.50 GiB free]
PV /dev/sdc1 VG vg_system1 lvm2 [16.00 GiB / 13.50 GiB free]
PV /dev/sdd1 VG vg_system1 lvm2 [16.00 GiB / 13.50 GiB free]
PV /dev/sda2 VG VolGroup lvm2 [11.51 GiB / 0 free]
Total: 4 [59.50 GiB] / in use: 4 [59.50 GiB] / in no VG: 0 [0 ]
I am at a loss to explain this, I cannot find any information relating to
these errors.
If I cannot resolve this within a reasonable period of time, I will be
forced to use mdraid which is much less flexible - i.e. if I wish to use
different RAID modes, I have to use separate partitions/volume groups for
example I would consider using unraided partitions for /boot, RAID 0 for
SWAP and /tmp and RAID 5 for the rest of the system. Separating these into
different partitions means the system will have to span further across the
disk at times.
I am considering possibly testing a later revision of LVM2 as I understand
that SL6.5 has LVM2-2.02.100-8 while subversions 101 - 105 are available. I
understand that to do this I may have to download the source code of this
and dependant packages and compile it. This is not something I can easily
do, but am prepared to try if I can get some guidance.
It may be useful to test this in RHEL 6.5 and CentOS 6.5 though I could only
do this on the latter myself.
Below are the scripts to destroy the test LV/VG/PV and a test pass, and a
script to create the PV/VG/LV as executed on a test system. Each attempt I
execute the destroy script prior to running the create script. There is also
a dump of the partition tables.
I hope you can point me in the right direction!
Thanks and Regards,
J Woolliscroft
[root at localhost ~]# cat d_lv
lvremove /dev/vg_system1/lv_system1
vgremove vg_system1
pvremove /dev/sdb1 /dev/sdc1 /dev/sdd1
=====
[root at localhost ~]# . ./d_lv
Do you really want to remove active logical volume lv_system1? [y/n]: y
Logical volume "lv_system1" successfully removed
Volume group "vg_system1" successfully removed
Labels on physical volume "/dev/sdb1" successfully wiped
Labels on physical volume "/dev/sdc1" successfully wiped
Labels on physical volume "/dev/sdd1" successfully wipeda
[root at localhost ~]# cat c_lv
parted -l
pvcreate -M2 -v /dev/sdb1 /dev/sdc1 /dev/sdd1
pvs -v -d
pvscan -v -d
vgcreate -s 4kib -v vg_system1 /dev/sdb1 /dev/sdc1 /dev/sdd1
vgs -v -d
vgscan -v -d
lvcreate --type raid5 -i 2 -I 4 -L 5G -ay -Zy -v -n lv_system1 vg_system1
lvs -v -d
lvscan -v -d
[root at localhost ~]# . ./c_lv
Model: ATA VBOX HARDDISK (scsi)
Disk /dev/sda: 12.9GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Number Start End Size Type File system Flags
1 1049kB 525MB 524MB primary ext4 boot
2 525MB 12.9GB 12.4GB primary lvm
Model: ATA VBOX HARDDISK (scsi)
Disk /dev/sdb: 17.2GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Number Start End Size File system Name Flags
1 1049kB 17.2GB 17.2GB primary lvm
Model: ATA VBOX HARDDISK (scsi)
Disk /dev/sdc: 17.2GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Number Start End Size File system Name Flags
1 1049kB 17.2GB 17.2GB primary lvm
Model: ATA VBOX HARDDISK (scsi)
Disk /dev/sdd: 17.2GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Number Start End Size File system Name Flags
1 1049kB 17.2GB 17.2GB primary lvm
Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/VolGroup-lv_swap: 2147MB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Number Start End Size File system Flags
1 0.00B 2147MB 2147MB linux-swap(v1)
Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/VolGroup-lv_root: 10.2GB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Number Start End Size File system Flags
1 0.00B 10.2GB 10.2GB ext4
Set up physical volume for "/dev/sdb1" with 33552351 available sectors
Zeroing start of device /dev/sdb1
Writing physical volume data to disk "/dev/sdb1"
Physical volume "/dev/sdb1" successfully created
Set up physical volume for "/dev/sdc1" with 33552351 available sectors
Zeroing start of device /dev/sdc1
Writing physical volume data to disk "/dev/sdc1"
Physical volume "/dev/sdc1" successfully created
Set up physical volume for "/dev/sdd1" with 33552351 available sectors
Zeroing start of device /dev/sdd1
Writing physical volume data to disk "/dev/sdd1"
Physical volume "/dev/sdd1" successfully created
Scanning for physical volume names
Wiping cache of LVM-capable devices
PV VG Fmt Attr PSize PFree DevSize PV UUID
/dev/sda2 VolGroup lvm2 a-- 11.51g 0 11.51g
JjV0kz-rW98-zTxe-X1jm-T9h3-i6SG-Frd325
/dev/sdb1 lvm2 a-- 16.00g 16.00g 16.00g
k7kxWU-W1bh-Eqda-xVj8-aBva-efN4-Et5B94
/dev/sdc1 lvm2 a-- 16.00g 16.00g 16.00g
9M29V5-qldE-mSVl-Z2UY-h9nM-1F3i-AEsNYu
/dev/sdd1 lvm2 a-- 16.00g 16.00g 16.00g
zPpXzZ-ptwp-qxok-ubNq-asmz-Ifcj-QtRvfv
Wiping cache of LVM-capable devices
Wiping internal VG cache
Walking through all physical volumes
PV /dev/sda2 VG VolGroup lvm2 [11.51 GiB / 0 free]
PV /dev/sdb1 lvm2 [16.00 GiB]
PV /dev/sdc1 lvm2 [16.00 GiB]
PV /dev/sdd1 lvm2 [16.00 GiB]
Total: 4 [59.50 GiB] / in use: 1 [11.51 GiB] / in no VG: 3 [48.00 GiB]
Wiping cache of LVM-capable devices
Wiping cache of LVM-capable devices
Adding physical volume '/dev/sdb1' to volume group 'vg_system1'
Adding physical volume '/dev/sdc1' to volume group 'vg_system1'
Adding physical volume '/dev/sdd1' to volume group 'vg_system1'
Archiving volume group "vg_system1" metadata (seqno 0).
Creating volume group backup "/etc/lvm/backup/vg_system1" (seqno 1).
Volume group "vg_system1" successfully created
Finding all volume groups
Finding volume group "vg_system1"
Finding volume group "VolGroup"
VG Attr Ext #PV #LV #SN VSize VFree VG UUID
VProfile
VolGroup wz--n- 4.00m 1 2 0 11.51g 0
oaJmPd-ElY9-a0E9-hUlu-SLxE-XTje-LfpO31
vg_system1 wz--n- 4.00k 3 0 0 47.99g 47.99g
hZTC0w-k0bJ-6M2A-Fmky-hHLo-hzHM-k8gdPl
Wiping cache of LVM-capable devices
Wiping internal VG cache
Reading all physical volumes. This may take a while...
Finding all volume groups
Finding volume group "vg_system1"
Found volume group "vg_system1" using metadata type lvm2
Finding volume group "VolGroup"
Found volume group "VolGroup" using metadata type lvm2
Setting logging type to disk
Finding volume group "vg_system1"
Archiving volume group "vg_system1" metadata (seqno 1).
Creating logical volume lv_system1
Creating logical volume lv_system1_rimage_0
Creating logical volume lv_system1_rmeta_0
Creating logical volume lv_system1_rimage_1
Creating logical volume lv_system1_rmeta_1
Creating logical volume lv_system1_rimage_2
Creating logical volume lv_system1_rmeta_2
activation/volume_list configuration setting not defined: Checking only
host tags for vg_system1/lv_system1_rmeta_0
Creating vg_system1-lv_system1_rmeta_0
Loading vg_system1-lv_system1_rmeta_0 table (253:2)
Resuming vg_system1-lv_system1_rmeta_0 (253:2)
Clearing metadata area of vg_system1/lv_system1_rmeta_0
Clearing start of logical volume "lv_system1_rmeta_0"
Removing vg_system1-lv_system1_rmeta_0 (253:2)
activation/volume_list configuration setting not defined: Checking only
host tags for vg_system1/lv_system1_rmeta_1
Creating vg_system1-lv_system1_rmeta_1
Loading vg_system1-lv_system1_rmeta_1 table (253:2)
Resuming vg_system1-lv_system1_rmeta_1 (253:2)
Clearing metadata area of vg_system1/lv_system1_rmeta_1
Clearing start of logical volume "lv_system1_rmeta_1"
Removing vg_system1-lv_system1_rmeta_1 (253:2)
activation/volume_list configuration setting not defined: Checking only
host tags for vg_system1/lv_system1_rmeta_2
Creating vg_system1-lv_system1_rmeta_2
Loading vg_system1-lv_system1_rmeta_2 table (253:2)
Resuming vg_system1-lv_system1_rmeta_2 (253:2)
Clearing metadata area of vg_system1/lv_system1_rmeta_2
Clearing start of logical volume "lv_system1_rmeta_2"
Removing vg_system1-lv_system1_rmeta_2 (253:2)
Creating volume group backup "/etc/lvm/backup/vg_system1" (seqno 3).
activation/volume_list configuration setting not defined: Checking only
host tags for vg_system1/lv_system1
Creating vg_system1-lv_system1_rmeta_0
Loading vg_system1-lv_system1_rmeta_0 table (253:2)
Resuming vg_system1-lv_system1_rmeta_0 (253:2)
Creating vg_system1-lv_system1_rimage_0
Loading vg_system1-lv_system1_rimage_0 table (253:3)
Resuming vg_system1-lv_system1_rimage_0 (253:3)
Creating vg_system1-lv_system1_rmeta_1
Loading vg_system1-lv_system1_rmeta_1 table (253:4)
Resuming vg_system1-lv_system1_rmeta_1 (253:4)
Creating vg_system1-lv_system1_rimage_1
Loading vg_system1-lv_system1_rimage_1 table (253:5)
Resuming vg_system1-lv_system1_rimage_1 (253:5)
Creating vg_system1-lv_system1_rmeta_2
Loading vg_system1-lv_system1_rmeta_2 table (253:6)
Resuming vg_system1-lv_system1_rmeta_2 (253:6)
Creating vg_system1-lv_system1_rimage_2
Loading vg_system1-lv_system1_rimage_2 table (253:7)
Resuming vg_system1-lv_system1_rimage_2 (253:7)
Creating vg_system1-lv_system1
Loading vg_system1-lv_system1 table (253:8)
Resuming vg_system1-lv_system1 (253:8)
Monitoring vg_system1/lv_system1
Clearing start of logical volume "lv_system1"
/dev/vg_system1/lv_system1: read failed after 0 of 4096 at 0: Input/output
error
/dev/vg_system1/lv_system1: write failed after 0 of 4096 at 0:
Input/output error
Creating volume group backup "/etc/lvm/backup/vg_system1" (seqno 3).
Logical volume "lv_system1" created
Finding all logical volumes
LV VG #Seg Attr LSize Maj Min KMaj KMin Pool Origin
Data% Meta% Move Cpy%Sync Log Convert LV UUID
LProfile
lv_root VolGroup 1 -wi-ao---- 9.51g -1 -1 253 0
BG77rR-C2lS-UXzm-V4KI-ptcG-1BZu-0yqVcV
lv_swap VolGroup 1 -wi-ao---- 2.00g -1 -1 253 1
i6uo0r-9T2P-OW60-Z1i7-6o7y-id1Q-1R7Lli
lv_system1 vg_system1 1 rwi-a-r-r- 5.00g -1 -1 253 8
100.00 GM0hKc-BHNV-CUAR-y0US-5Iw9-Ihi0-GSFD1V
Finding all logical volumes
ACTIVE '/dev/vg_system1/lv_system1' [5.00 GiB] inherit
ACTIVE '/dev/VolGroup/lv_root' [9.51 GiB] inherit
ACTIVE '/dev/VolGroup/lv_swap' [2.00 GiB] inherit
[root at localhost ~]#
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