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34752 discussions

Reconstructing duplicate lvm
by James Olin Oden 11 Oct '05

11 Oct '05

Hi All, Basically, I have an upgrade script for a system that breaks md mirrors and then constructs a chroot from the broken off members (i.e in this case partitions on /dev/sdb) and does the upgrade in this chroot. The end result is that until the reboot applications on this system can remain running while the chroot is being updated (much hand waving at this point). This works fine if LVM riding on top of md does not enter the equation. Now I have to contend with LVM, and it occured to me that after the mirror was broken I would in this chroot I would need to somehow reconstruct all the LVM stuff (pv's, vg's and lv's) with the pv now being a partition on /dev/sdb instead of some md device, because the current volume group was built on top of an md device for a physical volume and thus would only give me the active system no matter what I tried (or not work at all). So how does one do this without destroying data? And futhermore am I not seeing things clearly and am missing some important point? Thanks...james

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Boot hanging with rhgb
by Richard R (Dick) Rutledge 11 Oct '05

11 Oct '05

Hello I have installed Centos-4.1 and love it over Fedora or Mandriva. A big thank you to all the hands and minds that have put together a very good distribution. However I do have a problem when I boot with rhgb enabled in grub.conf. The system hangs at the end loading IE(when the bar is full). I can get bye in either of two ways. The first is to switch to a virtual console before the system hangs and the other is to remove the rhgb option in grub.conf. I would ask for any comments on how to trouble shoot this problem so it can be fix. Or if it is not important please tell me and I will remove the option from grub.conf. Thank you in advance for your help. Dick Rutledge

2 1

Areca controllers?
by HaraldFinnås 11 Oct '05

11 Oct '05

Just wondering if anyone has seen performance tests on Areca SATA controllers? How good are they compared to LSI "X" series and 3ware 9500s? And last but not least, are the drivers included in the stock kernel? Regards, Harald

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Query: Centos 4.2 availability
by Maciej Żenczykowski 11 Oct '05

11 Oct '05

Hi, Not meaning to rush you folks (you're doing a great job). But I'm about to install/clone 4 computers with Centos 4. When can I expect 4.2 to be out (in DVD format preferably)? As in, is it worth waiting and saving myself the later hassle extra downloads? [I don't actually have 4.1 DVD's, just 4.0, so I pretty much have to download the DVD.ISO anyway] Cheers & Thanks, MaZe.

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Compile error
by Sam Drinkard 10 Oct '05

10 Oct '05

A bit off topic, but having trouble again with the 64-bit libs when trying to compile this short fortran code to build a shared object. Can anyone offer an explaination of what is meant by the relocation bit, and how to fix it? I've tried the -fPIC, but apparently I either didn't have it in the right place or it does not work. Be glad to take this offline if somone could help me. Here's the output from the compile.... Hostid: PGI=003048E02E69493B247282 fortran routine compiled create shared library... /usr/bin/ld: wrf_user_fortran_util_0.o: relocation R_X86_64_32 against `a local symbol' can not be used when making a shared object; recompile with -fPIC wrf_user_fortran_util_0.o: could not read symbols: Bad value error in load, error exit

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process sigblk
by Jerry Geis 10 Oct '05

10 Oct '05

Given the below info: what signal is SigBlk indicating? THanks, Jerry ------------ State: S (sleeping) Tgid: 11542 Pid: 11542 PPid: 1 TracerPid: 0 Uid: 0 0 0 0 Gid: 0 0 0 0 FDSize: 256 Groups: 0 1 2 3 4 6 10 VmSize: 4888 kB VmLck: 0 kB VmRSS: 1944 kB VmData: 692 kB VmStk: 112 kB VmExe: 1220 kB VmLib: 2336 kB SigPnd: 0000000000000000 SigBlk: 0000000080000000 SigIgn: 8000000000000000 SigCgt: 00000003fffbfeff CapInh: 0000000000000000 CapPrm: 00000000fffffeff CapEff: 00000000fffffeff

1 0

centos on 64M 350Mhz pentimum II
by Jerry Geis 10 Oct '05

10 Oct '05

All, I have an old computer 64M 350Mhz pentium II. centos os 4.1 installs on it fine. however on boot it says low memory and it kills certain processes. httpd or sendmail. I have a 2GIG swap and I did a chkconfig XXX off on a few things like xfs, nfs, httpd, kudzu. My old 2.4 kernel used to run in 4M with a swap... I had recompiled the kernel (took a while) to enable the cyclades module. Any suggestions on running with low memory, thanks, Jerry

3 2

LM_SENSORS
by Sam Drinkard 10 Oct '05

10 Oct '05

Sorry if this has been around many times before, but I've done quite a bit of reading and searching for some type of human readable guide for setting up the lm_sensors for hardware monitoring. I've dorked around with the stuff in the system here, but after looking at the /etc/sensors.conf, I don't think I want to delve into that and try to pull out the right group of settings. It is definately a bit intimidating. So, is there any other software already written or in use for hardware monitoring that does not require a PhD to set up? The current sensors displays both the ISA and smbus readings, but none are even remotely close. The board uses thermistors for temp, which is mainly what I want to monitor. -- Snowman

4 6

PE-2850 to AX100 via Qlogic Card (QLA200 HBA) on CentOS 4.1
by kadafax 10 Oct '05

10 Oct '05

Hi list, I have the choice to use RHEL4 or Centos4.x on a Dell PowerEdge2850 who is linked to an AX100 storage system. My question is: does the QLA200 (the pci fiber channel card) driver will work on CentOS 4.1 . For now the card is listed like this on CentOS 4.1: --- #lspci 09:04.0 Fibre Channel: QLogic Corp.: Unknown device 6312 (rev 03) --- What kind of modification must/can I do to the original RPM driver for it to work on CentOS? Am I stuck to use RHEL? Thanks for any advice.

2 7

Iptables Rpm Missing Modules
by Ben Mohilef 10 Oct '05

10 Oct '05

The current build of iptables does not appear to include some modules. Among these are ipt_recent.so, a very handy module in deflecting the current flurry of sshd dictionary attacks. Lineox appears to have the same problem. This is because the RedHat source rpm spec file is not explicit in the kernel directory location and that omission affects these few modules. Required changes in the spec file are in bold and italics (everywhere there is a /usr just replace it by /usr/src/linux-2.4): make COPT_FLAGS="$OPT" KERNEL_DIR=/usr/src/linux-2.4 LIBDIR=/%{_lib} make COPT_FLAGS="$OPT" KERNEL_DIR=/usr/src/linux-2.4 LIBDIR=/%{_lib} iptables- save iptables-restore make COPT_FLAGS="$OPT" KERNEL_DIR=/usr/src/linux-2.4 LIBDIR=/%{_lib} ip6tables-save ip6tables-restore make install DESTDIR=%{buildroot} KERNEL_DIR=/usr/src/linux- 2.4 BINDIR=/sbin LIBDIR=/%{_lib} MANDIR=%{_mandir} %if %{build_devel} make install-devel DESTDIR=%{buildroot} KERNEL_DIR=/usr/src/linux-2.4 BINDIR=/sbin LIBDIR=%{_libdir} MANDIR=%{_mandir} To fix this yourself, first download the iptables source rpm, install it, modify the spec (/usr/src/redhat/SPECS/iptables.spec) and run rpmbuild -ba /usr/src/redhat/SPECS/iptables.spec . It runs quickly and produces an rpm which contains all of the missing modules.

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