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CentOS 5.2 with IBM SERVERAID 6i
by miguelmedalha＠sapo.pt 19 Nov '08

19 Nov '08

I need to install CentOS 5.2 on a IBM Server xSeries 226, which comes with a IBM SERVERAID 6i RAID card. I think it is not a true hardware RAID card. I has, nevertheless, an interesting feature: 128MB of cache with battery backup. I launched the CentOS boot DVD and CentOS correctly identified the card and the RAID 5 array as configured by the controller's BIOS. My question now is: what would be the better way to implement RAID 5 on this server? Should I use the detected array and respective driver or should I delete the array and go for Linus Software RAID? If both solutions are in fact Software RAID, is there any particular reason to prefer one of the methods? I know that Linux RAID will create a universal, more compatible array, readable on any Linux machine. But is there some other reason that makes it preferrable to use the SERVERAID driver provided by CentOS? Is it optimized in any way that recommends its use? Will the controller still make use of its cache and battery backup if configured as a plain SCSI controller with Linux Software RAID? I hope that some more experienced list member can ellucidate me on this. Thank you! PS - The machine is powered by a Intel P4 Xeon processor served by 2.5GB of RAM. The disks are 3 IBM 10K rpm SCSI 320 with 73 GB each.

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kickstart install on SAN with multipath
by nate 19 Nov '08

19 Nov '08

Using CentOS 5.1, though with a few hours work I could update to 5.2.. I can install to SAN with a single path no problem but I'd like to be able to use dm-multipath. From the kickstart docs it seems this is supported but there is no information as to what the various options mean http://www.centos.org/docs/5/html/5.1/Installation_Guide/s1-kickstart2-opti… -- multipath (optional) multipath --name= --device= --rule= -- I have a multipath.conf which works fine when I install to local disk, I'm not sure what I should put in the options above, perhaps something like multipath --name=mpath0 --device=sda --device=sdb --rule= ??? Done tons of searches and can't find anything. Any idea what "rule" would map to in multipath.conf ? I've even installed the anaconda package and grepped through the code and can't find anything useful. thanks nate

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nagios-plugins 1.4.13?
by Marcelo M. Garcia 19 Nov '08

19 Nov '08

Hi Does anyone knows when nagios-plugins 1.4.13 will be available? Thanks Marcelo

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net-snmp puzzle
by drew einhorn 19 Nov '08

19 Nov '08

I have a bunch of centos 5.2 boxes. I'm trying to run smtp on all of them. Using indentical net-snmp configuration files. /etc/snmp/snmpd.conf com2sec notConfigUser localhost smssnmp com2sec notConfigUser 10.1.1.0/24 smssnmp group notConfigGroup v1 notConfigUser group notConfigGroup v2c notConfigUser view systemview included .1 access notConfigGroup "" any noauth exact systemview none none syslocation SMS - North Carolina syscontact drew.einhorn(a)gmail.com pass .1.3.6.1.4.1.4413.4.1 /usr/bin/ucd5820stat I came up with this config file by tweaking some examples from howto docs on the web, I have not gotten to them point where I feel like I really understand it as well as I should. On some boxes it just works On some boxes it complains with: Nov 19 01:15:08 s1s0105 snmpd[7073]: /etc/snmp/snmpd.conf: line 1: Error: bad source address Nov 19 01:15:08 s1s0105 snmpd[7073]: net-snmp: 1 error(s) in config file(s) Nov 19 01:15:08 s1s0105 snmpd[7073]: NET-SNMP version 5.3.1 But it works anyway. On other boxes, it complains with: Nov 19 10:55:03 s1s0106 snmpd[22621]: Warning: no access control information configured. It's unlikely this agent can serve any useful purpose in this state. Run "snmpconf -g basic_setup" to help you configure the snmpd.conf file for this agent. Nov 19 10:55:03 s1s0106 snmpd[22621]: NET-SNMP version 5.3.1 And does not work. Fooling around with snmpconf leads to much different config files but they don't work any better. Any ideas? -- Drew Einhorn

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Clean serial console setup when using an USB to serial converter
by David Knecht 19 Nov '08

19 Nov '08

Hello all, I'd like to connect to a CentOS 5.2 system's console through a null-modem cable. An USB to serial converter is connected to that system's USB port. When using this configuration statement in "/etc/inittab"... ... # Run gettys on serial line (that is, a serial line connected to USB0) usb0:12345:respawn:/sbin/agetty -L ttyUSB0 9600 vt100 ... ...I get these messages if (and only if) the converter is *not* connected to the system (thus, if no ttyUSB0 device has been dynamically created): Nov 18 15:58:41 anyvizor init: Id "usb0" respawning too fast: disabled for 5 minutes Nov 18 16:05:22 anyvizor init: Id "usb0" respawning too fast: disabled for 5 minutes Nov 18 16:12:03 anyvizor init: Id "usb0" respawning too fast: disabled for 5 minutes Apart from that, connectivity to the serially attached console works fine of the serial line is connected. Obviously, I would like to have a clean setup without any errors where this kind of console setup works like a charm. As a workaround (since I did not get any further on an inittab-based solution), I tried to configure udev to spawn "/sbin/agetty -L ttyUSB0 9600 vt100" once the converter gets connected. This is my udev configuration: [root@anyvizor rules.d]# pwd /etc/udev/rules.d [root@anyvizor rules.d]# cat 10-custom.rules BUS=="usb", KERNEL=="ttyUSB*" SYMLINK+="usb_attached_console" SUBSYSTEM=="usb_device", ACTION=="add", RUN+="/etc/udev/scripts/respawn_usb_attached_console.sh" [root@anyvizor rules.d]# [root@anyvizor scripts]# pwd /etc/udev/scripts [root@anyvizor scripts]# cat respawn_usb_attached_console.sh #!/bin/env sh getty_command_line="/sbin/agetty -L usb_attached_console 9600 vt100" while [[ -e /dev/usb_attached_console && $(/usr/bin/pgrep -xf "${getty_command_line}" | /usr/bin/wc --lines) -eq 0 ]] do eval "${getty_command_line}" done [root@anyvizor scripts]# Again, connectivity to the serially attached console works fine once the system is up and running. However, the system does not pass the Starting udev... message displayed on the console (here, I mean the normal console screen, not the serially attached console) if (and only if) the USB to serial converter is connected when booting. The boot process continues fine once the converter gets disconnected. Any hints for an inittab-based as well as an udev-based solution (or another concept to achieve the same result) is very welcome! Thanks, David

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Re: [CentOS-devel] CentOS for router product
by Karanbir Singh 19 Nov '08

19 Nov '08

Arut Selvan wrote: > I have been told by my boss to do a feasability study of using CentOS > for our routing product. > > I have some basic questions regarding CentOS. Please clarify. > > 1. Is the kernel used by CentOS pre-emptible/non-preemptible ? > > 2. Does CentOS allow for assigning of process priorities (e.g in VxWorks > task priorities can be set at creation time) > > 3. What is the clock resolution provided ? a) you have the wrong list, you want the centos(a)centos.org list ( which is where I am replying ) b) where did you look to find answers for these questions, what did you come up with ? All of these can be answered via a trivial look at the sources, if you intend to use CentOS, that might be a good idea anyway - KB

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Restricting dhcpd to an interface
by Robert Moskowitz 19 Nov '08

19 Nov '08

I want to run dhcpd on my notebook to support test systems connecting on a separate interfaces. I have looked at both the dhcpd and dhcpd.conf man pages and did not find an 'interface' option. I will have 3 interfaces on my notebook. One for the notebooks network access and two for test systems. I want to serve different subnets on each of those interfaces, and have not figured this out yet.

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amd mobile on 1 cpu listed in /proc/cpuinfo
by Jerry Geis 19 Nov '08

19 Nov '08

I just noticed that my Dual core mobile AMD ZM-82 is only showing one processor in /proc/cpuinfo and not two. Is there a reason? I am running centos 5.2 x86_64. uname -a Linux demobox.msgnet.com 2.6.18-92.el5 #1 SMP Tue Jun 10 18:51:06 EDT 2008 x86_64 x86_64 x86_64 GNU/Linux Jerry -------------- more /proc/cpuinfo processor : 0 vendor_id : AuthenticAMD cpu family : 17 model : 3 model name : AMD Turion(tm) X2 Ultra Dual-Core Mobile ZM-82 stepping : 1 cpu MHz : 600.000 cache size : 1024 KB physical id : 0 siblings : 1 core id : 0 cpu cores : 1 fpu : yes fpu_exception : yes cpuid level : 1 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt rdtscp lm 3dnowext 3dn ow constant_tsc up pni cx16 lahf_lm cmp_legacy svm extapic cr8_legacy misalignsse 3dnowprefetch bogomips : 4393.73 TLB size : 1024 4K pages clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: ts ttp tm stc 100mhzsteps hwpstate [8]

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CentOS-announce Digest, Vol 45, Issue 12
by centos-announce-request＠centos.org 19 Nov '08

19 Nov '08

Send CentOS-announce mailing list submissions to centos-announce(a)centos.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.centos.org/mailman/listinfo/centos-announce or, via email, send a message with subject or body 'help' to centos-announce-request(a)centos.org You can reach the person managing the list at centos-announce-owner(a)centos.org When replying, please edit your Subject line so it is more specific than "Re: Contents of CentOS-announce digest..." Today's Topics: 1. CESA-2008:0988 Important CentOS 3 ia64 libxml2 - security update (Pasi Pirhonen) 2. CESA-2008:0988 Important CentOS 4 ia64 libxml2 - security update (Pasi Pirhonen) 3. CESA-2008:0967 Moderate CentOS 4 ia64 httpd - security update (Pasi Pirhonen) 4. CESA-2008:0988 Important CentOS 3 s390(x) libxml2 - security update (Pasi Pirhonen) 5. CESA-2008:0967 Moderate CentOS 4 s390(x) httpd - security update (Pasi Pirhonen) 6. CESA-2008:0988 Important CentOS 4 s390(x) libxml2 - security update (Pasi Pirhonen) 7. CESA-2008:0977 Critical CentOS 4 i386 seamonkey security update (Karanbir Singh) 8. CESA-2008:0977 Critical CentOS 4 x86_64 seamonkey security update (Karanbir Singh) ---------------------------------------------------------------------- Message: 1 Date: Tue, 18 Nov 2008 20:54:55 +0200 From: Pasi Pirhonen <upi(a)centos.fi> Subject: [CentOS-announce] CESA-2008:0988 Important CentOS 3 ia64 libxml2 - security update To: centos-announce(a)centos.org Message-ID: <20081118185455.GI11171(a)centos.fi> Content-Type: text/plain; charset="us-ascii" CentOS Errata and Security Advisory 2008:0988 https://rhn.redhat.com/errata/RHSA-2008-0988.html The following updated files have been uploaded and are currently syncing to the mirrors: ia64: updates/ia64/RPMS/libxml2-2.5.10-14.ia64.rpm updates/ia64/RPMS/libxml2-devel-2.5.10-14.ia64.rpm updates/ia64/RPMS/libxml2-python-2.5.10-14.ia64.rpm -- Pasi Pirhonen - upi(a)iki.fi - http://pasi.pirhonen.eu/ Top-postings silently ignored

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HW issue during instalaltion
by Philip Manuel 19 Nov '08

19 Nov '08

Hi All, I have a shuttle SN78SH7 with a Seagate ST31500341AS (1.5Tb) drive. With windows Vista it sees the drive and can install to it. So far with GRML or CentOS5.2 they do not seem to be able to see this drive. Is there a particular setting I need or does CentOS not support installation to these drives yet ? Thanks for your help Phil

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