Discuss May 2005

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221 participants
344 discussions

Software RAID on Centos 4 - new issue
by Nigel Kendrick 11 May '05

11 May '05

OK, I have managed to get software RAID 1 running on my wonderful Proliant server but now have two challenges: 1) Fresh after an OS install and reboot, the RAID array starts to do its stuff but straight away (as part of the boot messages) I am told that the second disk is 'not ready for command' and the system hangs as soon as resyncing starts. I think this is fixed by adding an hdparm line to turn on DMA (I was also losing ticks), but cannot check this because... 2) As part of the testing, I rebooted the system with the second drive pulled out, the whole lot then boots and I can use mdadm -a to add the second drive to the mirrored pair. The drives resync at a decent speed and the pair works fine for the duration, but when I reboot the second drive is not part of the mirrored pair unless I manually add it again. Looking at the md superblock for the second disk, I am wondering if all the attempts at setting up the RAID array have confused it as this is what I get - the last section looks wrong (??) mdadm -E /dev/hde /dev/hde: Magic : a92b4efc Version : 00.90.00 UUID : b0dcd24f:7044414a:1f0ba458:adabce9e Creation Time : Thu Sep 16 06:21:59 2004 Raid Level : raid1 Device Size : 193157440 (184.21 GiB 197.79 GB) Raid Devices : 2 Total Devices : 2 Preferred Minor : 0 Update Time : Wed May 11 09:13:50 2005 State : clean Active Devices : 1 Working Devices : 2 Failed Devices : 1 Spare Devices : 1 Checksum : 2652883e - correct Events : 0.15217 Number Major Minor RaidDevice State this 2 33 0 2 spare /dev/hde 0 0 22 3 0 active sync /dev/hdc3 1 1 0 0 1 faulty removed 2 2 33 0 2 spare /dev/hde Any suggestions on getting this pair talking properly? Thanks Nigel

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Multi-homed faq or docs needed
by Michael Rock 11 May '05

11 May '05

I tried to implement a multi-homed box using this faq 4.2.1 split access http://www.tldp.org/HOWTO/Adv-Routing-HOWTO/lartc.rpdb.multiple-links.html But it says table is invalid. Can someone tell me what the difference is in Centos? I assume the FAQ is leaving out how to add tables to the iproute files? I am trying to have eth0 and eth1 service two different subnets for apache and not act as a router. If I use redhat-network-config and set one or both with default gateways one side will not work. So I assume I need to create two routing table files? Can someone point me in the right direction or a better FAQ. thx __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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MIrrored drives won't boot after installation
by Jerry Geis 11 May '05

11 May '05

On Cent OS 4 the very last screen says REBOOT. Before click that do CTRL-ALT_F2 and get a prompt. then enter the following commands. This will allow the software raid arrays to boot. grub find /boot/grub/stage1 device (hd0) /dev/hda root (hd0,0) setup (hd0) This is easier the setting up mdXXX commands after boot. Jerry

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Backing up my server...
by israel.garcia＠cimex.com.cu 11 May '05

11 May '05

Helo, I've just installed a CentOS 4.0, postgress,iptables, ect.. on a P 4 Intel using sotf RAID 1 ...and everything is fine. I bought a HP DLT 40/80G tape device for being use as tape backup to my server. My questions are: 1. What you recomended me to use as a soft backUP. (amanda, dump/restore, TAR scipts, other)? 2. How can I backUP my entire filesystem ..(I mean everything using one the above software)? 3. What software can I use to put this data into my tape device (HP DLT 40/80 G).? 4. Is there only one software which do everything I want? NOTE: I am looking for some software which makes me a quick/easy backUP and quick/easy restore... thanks in advance israel

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CentOS-announce Digest, Vol 3, Issue 4
by centos-announce-request＠centos.org 11 May '05

11 May '05

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. php-5.0.4-0.iva.0.centos4.src.rpm (built for x86_64 and i386) in CentOS Plus (Johnny Hughes) ---------------------------------------------------------------------- Message: 1 Date: Tue, 10 May 2005 16:41:53 -0500 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] php-5.0.4-0.iva.0.centos4.src.rpm (built for x86_64 and i386) in CentOS Plus To: centos-announce(a)centos.org Message-ID: <1115761313.3693.69.camel(a)myth.home.local> Content-Type: text/plain; charset="us-ascii" All, Ignacio Vazquez-Abrams has created php-5.0.4-0.iva.0.centos4.src.rpm that works with CentOS-4. After testing this version of php, we have decided to include it in CentOS-Plus for CentOS-4. It is available for i386 and x86_64. There are several files in each distro: x86_64: php-5.0.4-0.iva.0.centos4.x86_64.rpm php-devel-5.0.4-0.iva.0.centos4.x86_64.rpm php-gd-5.0.4-0.iva.0.centos4.x86_64.rpm php-imap-5.0.4-0.iva.0.centos4.x86_64.rpm php-ldap-5.0.4-0.iva.0.centos4.x86_64.rpm php-mbstring-5.0.4-0.iva.0.centos4.x86_64.rpm php-mysql-5.0.4-0.iva.0.centos4.x86_64.rpm php-ncurses-5.0.4-0.iva.0.centos4.x86_64.rpm php-odbc-5.0.4-0.iva.0.centos4.x86_64.rpm php-pear-5.0.4-0.iva.0.centos4.x86_64.rpm php-pgsql-5.0.4-0.iva.0.centos4.x86_64.rpm php-snmp-5.0.4-0.iva.0.centos4.x86_64.rpm php-soap-5.0.4-0.iva.0.centos4.x86_64.rpm php-xml-5.0.4-0.iva.0.centos4.x86_64.rpm php-xmlrpc-5.0.4-0.iva.0.centos4.x86_64.rpm i386: php-5.0.4-0.iva.0.centos4.i386.rpm php-devel-5.0.4-0.iva.0.centos4.i386.rpm php-gd-5.0.4-0.iva.0.centos4.i386.rpm php-imap-5.0.4-0.iva.0.centos4.i386.rpm php-ldap-5.0.4-0.iva.0.centos4.i386.rpm php-mbstring-5.0.4-0.iva.0.centos4.i386.rpm php-mysql-5.0.4-0.iva.0.centos4.i386.rpm php-ncurses-5.0.4-0.iva.0.centos4.i386.rpm php-odbc-5.0.4-0.iva.0.centos4.i386.rpm php-pear-5.0.4-0.iva.0.centos4.i386.rpm php-pgsql-5.0.4-0.iva.0.centos4.i386.rpm php-snmp-5.0.4-0.iva.0.centos4.i386.rpm php-soap-5.0.4-0.iva.0.centos4.i386.rpm php-xml-5.0.4-0.iva.0.centos4.i386.rpm php-xmlrpc-5.0.4-0.iva.0.centos4.i386.rpm src: php-5.0.4-0.iva.0.centos4.src.rpm You can get these via yum if you enable the CentOS-Plus repository. For a description of the CentOS Plus (and other) repositories, see this link: http://lists.centos.org/pipermail/centos/2005-May/005618.html Thank you very much Ignacio :) -- Johnny Hughes

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Yum Error on CentOS 4_64 / libexpat Issues
by Ho Chaw Ming 11 May '05

11 May '05

Dear all I had an issue on CentOS 4_64 with yum that I would like some input on. When running yum, the following errors appear: Traceback (most recent call last): File "/usr/bin/yum", line 6, in ? import yummain File "/usr/share/yum-cli/yummain.py", line 23, in ? import yum File "__init__.py", line 33, in ? File "groups.py", line 3, in ? File "comps.py", line 5, in ? File "/usr/lib64/python2.3/site-packages/libxml2.py", line 1, in ? import libxml2mod ImportError: /usr/lib64/python2.3/site-packages/libxml2mod.so: undefined symbol: xmlNewDocPI I had tried downloading all the various libxslt* and libxml2* and python and python-devel rpms and running rpm -Uvh --oldpackage --install *.rpm Nothing seems to work however. Anyone with any ideas? I had a separate issue which may be linked (or not). When running /sbin/ldconfig, the folllowing message appears. ldconfig: libraries libexpat.so.0 and libexpat.so.0.4.0 in directory /usr/lib have same soname but different type. root@ <mailto:root@207-150-176-14> [/usr/lib]# ls -all libexpat* -rw-r--r-- 1 root root 432298 May 11 01:51 libexpat.a -rwxr-xr-x 1 root root 706 May 11 01:51 libexpat.la* lrwxrwxrwx 1 root root 17 May 11 02:19 libexpat.so -> libexpat.so.0.5.0* lrwxrwxrwx 1 root root 17 May 11 03:15 libexpat.so.0 -> libexpat.so.0.5.0* -rwxr-xr-x 1 root root 261635 May 11 01:51 libexpat.so.0.4.0* -rwxr-xr-x 1 root root 122048 Feb 21 20:00 libexpat.so.0.5.0* Any insight or guidance is appreciated. regards

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centos 4: java crashes on amd64
by Dario Lah 11 May '05

11 May '05

Anyone experiencing problems with java on amd64? Different versions of java are crashing after few minutes. Googling around reveals that problem is probably in JIT. Disabling JIT makes it unusable (slow) but it doesn't crash. Fix anyone? Hint? Regards, Dario

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Re: [CentOS] Hardware RAID Controller
by Bryan J. Smith <b.j.smith＠ieee.org> 10 May '05

10 May '05

Ahhh, thanx for the insight. I never liked their use of lackluster i960 33MHz and 66MHz parts. You're lucky if you get 60MBps out of them. -----Original Message----- From: Harald Finnï¿½s <spamcatcher(a)lantrix.no> Sent: May 10, 2005 3:55 PM To: CentOS mailing list <centos(a)centos.org> Subject: Re: [CentOS] Hardware RAID Controller centos-bounces(a)centos.org wrote on 10.05.2005 22:44:54: > Well, that's because 98% of Promise's products sold are FRAID > (Fake/Free RAID). The card I had in mind was the "real" RAID cards, i.e the SX6000. It was ok while RH8 was the standard and you didn't need to compile a new kernel (ie. you could use the Promise-supplied driver disks). They also had driver source for 2.4 which worked ok as long as you booted from another device and loaded the driver as a module. And actually, the SX6000 worked with the I2O drivers for a little while with a patch supplied by Alan Cox, but after a few kernel updates I gave up on it. I was in contact with Promise support about one year ago, and they told me that they had 2.6 drivers in beta, and that they would inform me when it became available. Needless to say, there's still no 2.6 drivers posted on their download pages. Well, enough bitchin for now... :) Regards, Harald -- Bryan J. Smith mailto:b.j.smith@ieee.org

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Re: [CentOS] Hardware RAID Controller
by Bryan J. Smith <b.j.smith＠ieee.org> 10 May '05

10 May '05

From: Harald Finnï¿½s <spamcatcher(a)lantrix.no> > Promise is crap with Linux in general, > and they really don't support linux at all... Well, that's because 98% of Promise's products sold are FRAID (Fake/Free RAID). They are a "regular" ATA controller slapped with a 16-bit "trick BIOS." That system has the RAID code needed as long as OS is only accessing 16-bit BIOS Int13h Disk Services. The second a 32-bit OS loads, it sees the "raw" disks and doesn't understand them. That's where the 100% _software_ driver comes in, it emulates the volume for the 32-bit OS. Since all of that RAID code -- typically licensed from the same company by _all_ of the countless FRAID/mainboard-FRAID vendors out there -- it can't be GPL. Hence why FRAID products don't have GPL drivers. Except for the 'independent' GPL "ataraid.c" FRAID logic, and the reverse engineered "hptraid.c", "pdcraid" and "silraid.c" companion 'interface' GPL drivers. Of course, there is *0* guarantee those non-vendor implementations will work. I've seen people try to use them and toast their entire volume. _Real_hardware_ RAID cards completely hide the disks from the system. I.e., the system _never_ talks directly to the hard drives, but an intelligent microcontroller or ASIC. The "RAID Brains" is on the card, and the microcontroller or ASIC actually executes that code -- not your main CPU. The driver is then just a simple block driver to send data to/from the host system to the on-board intelligence. Hence why the drivers are typically GPL, there's little to them other than a basic, block SCSI driver. No RAID logic is ever exposed in the kernel driver. -- Bryan J. Smith mailto:b.j.smith@ieee.org

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Re: [CentOS] Hardware RAID Controller
by Bryan J. Smith <b.j.smith＠ieee.org> 10 May '05

10 May '05

From: Lee W <centos-list(a)unassemble.co.uk> > Ebay UK didn't turn up much (althought there was a few in the US). > However just tried googling a bit more and I've come across a 3ware > Escalade 7506-4LP for about ï¿½200.00 which supports upto 4 drives so that > should be suitable for my purposes, plus it looks quite small (being a > Low-Profile card) so should fit in the rack as well. You can even take the bracket off as long as you can mechanically secure it another way. > Okay I'm getting a bit over my head now. Anyone see any problems > putting 2 of these in the same machine. 3Ware has always supported up to 4 cards in a system. Just make sure the firmwares are the same for each model or expect issues with drivers. > After a few other comments I was thinking of trying 2 x RAID-1's. Why not a 4-drive RAID-0+1? It's far better to do it on a single card. Unless you are thinking of (2) RAID-1, each on their own PCI-X channel, and then a RAID-0 LVM2 stripe across them? In reality, you're really gotta get up to 8 drives in RAID-0+1 before you're going to saturate the 0.5GBps 64-bit @ 66MHz PCI bus. And in all the 1U systems I've seen, I've only seen a maximum of (2) PCI-X channels. You'll want to use one dedicated to your NIC. -- Bryan J. Smith mailto:b.j.smith@ieee.org

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Discuss May 2005