I have a fresh build of minimal CentOS 6.2 on my server.
I built the OS on a set of software mirrors created in the OS install process.
The system boots and works fine, but I get the following two errors at boot time:
[b]From /var/log/boot.log[/b]
[code]Welcome to CentOS
Avvio di udev: udevd-work[395]: error opening ATTR{/sys/devices/virtual/block/md0/queue/iosched/slice_idle} for writing: No such file or directory
udevd-work[395]: error opening ATTR{/sys/devices/virtual/block/md0/queue/iosched/quantum} for writing: No such file or directory
[ OK ][/code]
No other message appear.
I have made many times software RAID 1 in Centos 5 and I never had any problem.
I have read many posts but I haven't found nothing usefull.
Surely I have a simple error, but I don't know what or where is it.
Here some detail about raid configuration:
/dev/md0 /boot
/dev/md1 swap
/dev/md2 /
[b]cat /proc/mdstat[/b]
[code]
Personalities : [raid1]
md0 : active raid1 sda1[0] sdb1[1]
255988 blocks super 1.0 [2/2] [UU]
md2 : active raid1 sda3[0] sdb3[1]
153934780 blocks super 1.1 [2/2] [UU]
bitmap: 1/2 pages [4KB], 65536KB chunk
md1 : active raid1 sda2[0] sdb2[1]
2096120 blocks super 1.1 [2/2] [UU]
unused devices: <none>
[/code]
[b]mdadm --detail /dev/md0[/b]
[code]
/dev/md0:
Version : 1.0
Creation Time : Wed Feb 15 17:21:56 2012
Raid Level : raid1
Array Size : 255988 (250.03 MiB 262.13 MB)
Used Dev Size : 255988 (250.03 MiB 262.13 MB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent
Update Time : Thu Feb 16 15:44:51 2012
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Name : Ade:0 (local to host Ade)
UUID : d9d724ff:24f7177e:35323cdf:368bcfff
Events : 19
Number Major Minor RaidDevice State
0 8 1 0 active sync /dev/sda1
1 8 17 1 active sync /dev/sdb1
[/code]
[b]mdadm --detail /dev/md2[/b]
[code]
/dev/md2:
Version : 1.1
Creation Time : Wed Feb 15 17:21:59 2012
Raid Level : raid1
Array Size : 153934780 (146.80 GiB 157.63 GB)
Used Dev Size : 153934780 (146.80 GiB 157.63 GB)
Raid Devices : 2
Total Devices : 2
Persistence : Superblock is persistent
Intent Bitmap : Internal
Update Time : Thu Feb 16 16:46:05 2012
State : active
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Name : Ade:2 (local to host Ade)
UUID : 948f56c7:284db924:bf8e44e3:cb5ebc85
Events : 1326
Number Major Minor RaidDevice State
0 8 3 0 active sync /dev/sda3
1 8 19 1 active sync /dev/sdb3
[/code]
udevd-work report error on boot software raid1
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udevd-work report error on boot software raid1
Welcome to the CentOS fora. Please see the recommended reading for new users linked in my signature.
The message may be disconcerting, but I see nothing in the later data you show to indicate a problem with the RAID. Am I missing something?
The message may be disconcerting, but I see nothing in the later data you show to indicate a problem with the RAID. Am I missing something?
Re: udevd-work report error on boot software raid1
Everything works fine thanks, but I want to know why udev displays this message.
I do not understand because it shows that error on md0 and not on md2.
The two directories:
/sys/devices/virtual/block/md0/queue/[b]iosched[/b]/
/sys/devices/virtual/block/md2/queue/[b]iosched[/b]/
not exist in the filesystem, but udev displays the error "No such file or directory" only on md0 device.
Why?
Thanks for your attention and sorry for my poor English
I do not understand because it shows that error on md0 and not on md2.
The two directories:
/sys/devices/virtual/block/md0/queue/[b]iosched[/b]/
/sys/devices/virtual/block/md2/queue/[b]iosched[/b]/
not exist in the filesystem, but udev displays the error "No such file or directory" only on md0 device.
Why?
Thanks for your attention and sorry for my poor English
Re: udevd-work report error on boot software raid1
I know that this is an old post, but the same thing started happening to my system when I replaced a failing hard-drive in my raid-1 array with a ssd drive. Apparently it relates to I/O tuning which can be setup in CentOS6.
I refer the interested to this url: https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Performance_Tuning_Guide/main-io.html
I refer the interested to this url: https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Performance_Tuning_Guide/main-io.html