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rescheduling sector linux raid ?
by Eero Volotinen 14 Feb '11

14 Feb '11

Hi List, What this means? md: syncing RAID array md0 md: minimum _guaranteed_ reconstruction speed: 1000 KB/sec/disc. md: using maximum available idle IO bandwidth (but not more than 200000 KB/sec) for reconstruction. md: using 128k window, over a total of 2096384 blocks. md: md0: sync done. RAID1 conf printout: --- wd:2 rd:2 disk 0, wo:0, o:1, dev:sda2 disk 1, wo:0, o:1, dev:sdb2 sd 0:0:0:0: SCSI error: return code = 0x06000000 end_request: I/O error, dev sda, sector 451792231 raid1: sda1: rescheduling sector 451792168 sd 0:0:0:0: SCSI error: return code = 0x06000000 end_request: I/O error, dev sda, sector 451792263 raid1: sda1: rescheduling sector 451792200 raid1: sdb1: redirecting sector 451792168 to another mirror raid1: sdb1: redirecting sector 451792200 to another mirror md: syncing RAID array md0 md: minimum _guaranteed_ reconstruction speed: 1000 KB/sec/disc. md: using maximum available idle IO bandwidth (but not more than 200000 KB/sec) for reconstruction. md: using 128k window, over a total of 2096384 blocks. md: md0: sync done. RAID1 conf printout: --- wd:2 rd:2 disk 0, wo:0, o:1, dev:sda2 disk 1, wo:0, o:1, dev:sdb2 note lines: sd 0:0:0:0: SCSI error: return code = 0x06000000 end_request: I/O error, dev sda, sector 451792263 raid1: sda1: rescheduling sector 451792200 raid1: sdb1: redirecting sector 451792168 to another mirror raid1: sdb1: redirecting sector 451792200 to another mirror Is one disk going down? cat /proc/mdstat still shows software raid array as working one. -- Eero

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ifcfg-rh: error: Missing or invalid IP4 prefix '0
by aurfalien＠gmail.com 14 Feb '11

14 Feb '11

Hi all, I get the following in my logs, seems like its benign but wanted to get any thoughts. nm-system-settings: ifcfg-rh: parsing /etc/sysconfig/network- scripts/ifcfg-bond0 ... nm-system-settings: ifcfg-rh: error: Missing or invalid IP4 prefix '0' I get this for all 4 nics in my bond as well as my loopback. No network issues, all is well. - aurf

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Are some CentOS package out of date compared to RH?
by James Chase 14 Feb '11

14 Feb '11

According to the RH5 Errata, the most recent package for scsi-target-utils is scsi-target-utils-1.0.8-0.el5.x86_64.rpm However the latest update via yum on CentOS is labeled scsi-target-utils-0.0-6.20091205snap.el5_5.3 Additionally, the package info says it is not compatible with iSCSI yet, which is false! There were some critical updates for this package according to RedHat, so how can I be sure that I am at the correct version? In looking at some other packages on my CentOS system, like httpd, I am noticing they are also out of date in regards to Red Hat updates. Is this common? Name : scsi-target-utils Arch : x86_64 Version : 0.0 Release : 6.20091205snap.el5_5.3 Size : 143 k Repo : updates Summary : The SCSI target daemon and utility programs URL : http://stgt.berlios.de License : GPLv2 Description: The SCSI target package contains the daemon and tools to setup a : SCSI targets. Currently, software iSCSI targets are supported.

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sandboxie like application for CentOS?
by erikmccaskey64 14 Feb '11

14 Feb '11

http://www.filehippo.com/download_sandboxie/ It's a great application [ for windows... :\ ] Are there any programs under CentOS, that has the ~same features? To be specific: The user could launch a program [e.g.: Google Chrome] inside this sandbox, and when he/she exits Google Chrome, all the changes that Google Chrome did is "undoed". + Google Chrome is in a sandbox, so it can't "see"/read the files of the user! Thanks for any tips, link, opinions!

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java please help
by ann kok 14 Feb '11

14 Feb '11

Hi I use yum to install openjdk 1.6.0 in centos5.5 but the firefox browser still says that JRE not installation / Java is disabled Can you help

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Security: gnome-screensaver VS. switch user
by erikmccaskey64 13 Feb '11

13 Feb '11

People "usually" suspend their laptop, so that they can continue their work when they open the laptop. OK! Two choices [GNOME]: 1 - Menu -> Shut Down -> Suspend in this case, the gnome-screensaver locks the PC. but the gnome-screensaver is just a "normal process", and it could be killed e.g.: http://securitytube.net/USB-Autorun-attacks-against-Linux-at-Shmoocon-2011-… or using any method [video was just an example!!]. 2 - Menu -> Log out -> Switch user -> Suspend in this case, the GDM [???] protects the user [i mean it locks the PC from other users] Which one is more secure/safer?

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Software RAID vs 'fake/ on-board RAID'
by David Hornford 13 Feb '11

13 Feb '11

Setting: We are setting up a low usage server for an alfresco km/collaboration system It is a low-end server with a pair of 1.5 TB disks we will be mirroring The server comes with Intel's on-board 'fake raid/ low-end RAID' capability and for price reasons we have not selected a mainstream RAID card Prior thoughts: Searches on the net indicate no performance advantage, and possible performance disadvantages to the on-board RAID I expect Intel & the Centos product to be rough equivalents in quality I am leaning to software RAID for a simple reason of minimizing my administration & operational burden. If I need to perform repairs, obtain alerts it is the same administration toolset rather than a BIOS-based tool that seems to be accessible only through boot/ reboot. Question: Over a reasonable lifecycle are we better served going with the on-board or Centos' software RAID? Any issue with booting from the RAID (obviously RAID 1)? Thanks in advance for your thoughts. Dave

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Strange Kernel for Centos 5.5
by Always Learning 13 Feb '11

13 Feb '11

One of my VPS stopped working. After the data centre replaced a disk normal service resumed, then I notices this: CentOS release 5.5 (Final) Kernel 2.6.35.4 on an x86_64 I always thought Centos 5.x would always be on 2.6.18. Any thoughts?

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Re: [CentOS] CentOS Digest, Vol 73, Issue 12
by Chuck Munro 12 Feb '11

12 Feb '11

On 02/12/2011 09:00 AM, Gerhard Schneider wrote: > > Sorry, I don't use CentOS 6 now so I cannot check, but: > > Could it be that RHEL6 changed the default superblock mdadm is creating? > CentOS 5 is creating a 0.9 superblock. Some "other OS" are creating 1.2 > per default. But you can change that on the command line. > > If that's the case it's not a bug but a feature.. > > GS > > -- Gerhard Schneider Institute of Lightweight Design and e-Mail: > gs(a)ilsb.tuwien.ac.at Structural Biomechanics (E317) Tel.: +43 664 60 588 > 3171 Vienna University of Technology / Austria Fax: +43 1 58801 31799 > A-1040 Wien, Gusshausstrasse 27-29 http://www.ilsb.tuwien.ac.at/~gs/ Bingo! That hadn't occurred to me. And 1.2 is specified in the mdadm.conf file, which went right over my head. :-( Thanks Gerhard; mystery solved. Now all I need to do is wait for CentOS-6 to see if it correctly assembles all members of the arrays at boot time. I suspect the evaluation copy of RHEL-6 is not really up to date, so there may be issues with mdadm. I did take a look around the RedHat bugzilla site and saw a couple of things that might be related to the problem. Chuck

1 0

Samba or NFS
by Alfredo Perez 12 Feb '11

12 Feb '11

Hello Thinking of setup a backup process between two Centos systems. One will backup to the other one. For those people out there with Centos production severs what would you recommend to use Samba or NFS What is the most common and simple to use? Many thanks in advance Alfredo

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