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Re: [CentOS] OT hard disk geometry
by Miguel Medalha 08 Feb '14

08 Feb '14

With some SATA drives the mode change can only be done by a software utility. Some of them don't have jumpers at all.

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Multitab GUI SSH clilent found
by Ljubomir Ljubojevic 08 Feb '14

08 Feb '14

Hi. I just wanted to notify all that I found very nice GUI SSH client at http://sourceforge.net/projects/pacmanager/ It has rpm packages and works very nice. Multi-tab, Expact support, connections tree, connection , user and password saving (I know they should not be saved). Only manual download as far as I know, no repository caries it. -- Ljubomir Ljubojevic (Love is in the Air) PL Computers Serbia, Europe StarOS, Mikrotik and CentOS/RHEL/Linux consultant

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Re: [CentOS] OT hard disk geometry
by Miguel Medalha 08 Feb '14

08 Feb '14

>> that I am running CentOS-6.5 on my HP MicroServer. Can you please tell us which exact model of MicroServer do you have? That way, it will be easier to help you.

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Raid on centos
by Jeff Allison 07 Feb '14

07 Feb '14

Ok I've a HP mircoserver that I'm building up. It's got 4 bays for be used for data that I'm considering setup up woth softwere raid (mdadm) I've 2 x 2TB 2 x 2.5 TB and 2 x 1TB, I'm leaning towards usig the 4 2.x TB is a raid 5 array to get 6TB. Now the data is on the 2.5TB disks currently. So the plan so far. Building the array as a degraded raid 5 with the 2 x 2TB disks that are emply. Copy the data from one of the 2.5TB disks on to array. Add now empty 2.5TB disk to the Array and wait for it to rebuild. Copy contents of remaining 2.5TB disk 2 array. Add now empty 2.5TB disk to the Array and wait for it to rebuild. So questions... Is the above a stupid idea? Do I need to get involved in gptids? on disks this size? What format should I create the file system as? Should I get lvm involved somewhere? Any pointers would be kindly appreciated. Jeff

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"BUG: soft lockup - CPU#n stuck for X s! [swapper:0]"
by Robert Heller 07 Feb '14

07 Feb '14

I just updated my quad-processor X64 machine (AMD Phenom(tm) II X4 945 Processor) to the latest CentOS 5 xen kernel (2.6.18-371.4.1.el5xen) and I am getting occasional "BUG: soft lockup - CPU#n stuck for X s! [swapper:0]" messages. I did some net searching, and found some bugzilla reports (https://bugzilla.redhat.com/show_bug.cgi?id=649519 and http://bugs.centos.org/view.php?id=4488) but neither are shown as resolved. The machine *seems* to be running alright (it is not hanging or anything). Is this something I need to worry about? Should I revert to the older kernel (2.6.18-371.3.1.el5xen)? This is NOT happening on my single-processor 32-bit laptop (running 2.6.18-371.4.1.el5). -- Robert Heller -- 978-544-6933 / heller(a)deepsoft.com Deepwoods Software -- http://www.deepsoft.com/ () ascii ribbon campaign -- against html e-mail /\ www.asciiribbon.org -- against proprietary attachments

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Virtual Hosts question
by Joseph Hesse 07 Feb '14

07 Feb '14

I am running Wordpress on a CentOS 6.5 server which is behind a router. The private IP is 192.168.0.99, the public URL is X.com (name changed). I have two virtual hosts in my httpd.conf file. The second one, listed below, is for Wordpress and it is accessed with http://X.com/d4i or http://www.X.com/d4i. They work fine. Actually, not show, I have more Wordpress virtual hosts, and they are accessed with http://X.com/s1, http://X.com/s2, etc. and they work. I want the first virtual host to be a default and accessed whenever a user types http://X.com (no sub directory). There is a valid /var/www/html/index.html file. Unfortunately it doesn't work. The error is "Directory index forbidden by Options directive: /var/www/wordpress/" and googling didn't help. I have my httpd.conf and error.log below. Thank you, Joe ============== httpd.conf ============== ServerName 192.168.0.99 NameVirtualHost *:80 <VirtualHost *:80> ServerName IDoNotExist.com DocumentRoot /var/www/html DirectoryIndex Index.html index.html </VirtualHost> <VirtualHost *:80> ServerName X.com ServerAlias www.X.com DocumentRoot /var/www/wordpress DirectoryIndex Index.html index.html index.php Index.php CustomLog logs/access_log_custom common </VirtualHost> ============== httpd.conf ============== ========Tail of error.log ================== [Thu Feb 06 10:25:48 2014] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec) [Thu Feb 06 10:25:48 2014] [notice] Digest: generating secret for digest authentication ... [Thu Feb 06 10:25:48 2014] [notice] Digest: done [Thu Feb 06 10:25:49 2014] [notice] Apache/2.2.15 (Unix) DAV/2 PHP/5.3.3 configured -- resuming normal operations [Thu Feb 06 10:26:01 2014] [error] [client 24.118.254.66] Directory index forbidden by Options directive: /var/www/wordpress/ [Thu Feb 06 10:26:01 2014] [error] [client 24.118.254.66] File does not exist: /var/www/wordpress/favicon.ico ============== error.log ==============

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Console access to kvm guest running WindowsV7
by James B. Byrne 06 Feb '14

06 Feb '14

i86_64 CentOS-6.5 I have installed a Windows instance as a kvm guest on a host running CentOS-6.5. I can access the desktop through the virt-manager console and everythign seems to work, although the mouse cursor seems to get lost from time to time. The virt-manager console display supports various resolutions but when I re-size the desktop display remains essentially a square inside a letter box. What other methods are available to open the windows desktop from the CentOS-6.5 host console or by remote access that allow me to have a re-sizable MS-Windows desktop display for this guest running on my normal (gnome2) desktop? Any suggestions? -- *** E-Mail is NOT a SECURE channel *** James B. Byrne mailto:ByrneJB@Harte-Lyne.ca Harte & Lyne Limited http://www.harte-lyne.ca 9 Brockley Drive vox: +1 905 561 1241 Hamilton, Ontario fax: +1 905 561 0757 Canada L8E 3C3

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NFS not recognizing available file space
by Pat Haley 06 Feb '14

06 Feb '14

Hi, I have a server running under CentOS 5.8 and I appear to be in a situation in which the NFS file server is not recognizing the available space on a particular disk (actually a hardware RAID-6 of 13 2Tb disks). If I try to write to the disk I get the following error message [root@nas-0-1 mseas-data-0-1]# touch dum touch: cannot touch `dum': No space left on device However, if I check the available space, there seems to be plenty [root@nas-0-1 mseas-data-0-1]# df -h . Filesystem Size Used Avail Use% Mounted on /dev/sdb1 21T 20T 784G 97% /mseas-data-0-1 [root@nas-0-1 mseas-data-0-1]# df -i . Filesystem Inodes IUsed IFree IUse% Mounted on /dev/sdb1 3290047552 4391552 3285656000 1% /mseas-data-0-1 I don't know if the following is relevant but the disk in question is served as one of 3 bricks in a gluster namespace. Based on the test with touch, which is happening directly at the NFS level, this seems to be an NFS rather than gluster issue. I couldn't find any file in /var/log which had a time that corresponded to the failed touch test and I didn't see anything in dmesg. We have tried rebooting this system. What else should we look at and/or try to resolve or debug this issue? Thanks. Pat -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Pat Haley Email: phaley(a)mit.edu Center for Ocean Engineering Phone: (617) 253-6824 Dept. of Mechanical Engineering Fax: (617) 253-8125 MIT, Room 5-213 http://web.mit.edu/phaley/www/ 77 Massachusetts Avenue Cambridge, MA 02139-4301

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Re: [CentOS] Install without LVM -
by James A. Peltier 06 Feb '14

06 Feb '14

----- Original Message ----- | | | Am 06.02.2014 21:16, schrieb James A. Peltier: | > ----- Original Message ----- | > | | > | How do I install from the centos 6.5 dvd without LVM? Nothing I | > | have | > | tried will permit me to make my own layout unless I accept LVM. | > | | > | Bob | > | | > | -- | > | http://www.qrz.com/db/w2bod | > | Box10 Fedora-20/64bit Linux/XFCE | > | | > | _______________________________________________ | > | CentOS mailing list | > | CentOS(a)centos.org | > | http://lists.centos.org/mailman/listinfo/centos | > | | > | > If not doing a graphical install you will be limited in many | > respects as to what you can do from a disk layout perspective. | > I would also ask why it is that you are choosing not to use LVM | > which offers many bits of useful functionality over | > traditional partitions | | LVM does not offer *anything* sane if it is only blind LVM It's statements like this that are most frustrating. You have made assumptions as to what this person is trying to do rather than answering the question. I answered the question and posed another question. If he's asking one, it might be good to know why the question was asked in the first place. | what benefits? | that you can extend it with additional disks? | nobody right in his mind would do that without have LVM on top of | RAID So, the fact that I use LVM on a single disk makes me out of my mind? I do this because I may miscalculate the disk requirements for one mount point over another. I don't have the traditional whole disk lv_root volume. I have seperate LVs for /var, /home, /data, /local-scratch all of which can be resized at a whim. Oh, and if I get a bigger disk (/data is on a whole disk LVM PV), I can just do a pvmigrate over to the bigger disk. There are many useful reasons to have LVM. | why? because *any* disk failure would be fatal | having 3 disks that way you have *three times* more likely a complete | data loss Sure, here you are correct. If you've gone and done something like place an Logical Volume across multiple single points of failure you've done something that may be seen as "bad". It's not our place to judge the decision, it's our place to offer possible solutions to the needs of the user. | the ordinary uiser *doesn not* need LVM nor can he handle it proper | the advanced user knows hat he is doing and could select it anyways Define ordinary user in this context. The user has made no statement to how "ordinary" they are. They asked a question. The question was answered and another question (mine) asked to try to figure out what the OP is trying to do. | this was, is and will ever be a useless and often dangerous default There is no proof that this is a dangerous default. LVM works just fine while offering additional functionality whether used by the "ordinary" user or not. Offer up concrete evidence as to how LVM vs partitions is any less dangerous on any SPoF failure system. I'd be interested to hear it as I myself have not run into problems with LVM in the past decade or so. Ya, it used to be bad, but it's much, *much* better than it was. -- James A. Peltier Manager, IT Services - Research Computing Group Simon Fraser University - Burnaby Campus Phone : 778-782-6573 Fax : 778-782-3045 E-Mail : jpeltier(a)sfu.ca Website : http://www.sfu.ca/itservices "I want to inspire people. I want someone to say "because of you I didn't give up". - Chanda Kaushik

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Install without LVM -
by Bob Goodwin - Zuni, Virginia, USA 06 Feb '14

06 Feb '14

How do I install from the centos 6.5 dvd without LVM? Nothing I have tried will permit me to make my own layout unless I accept LVM. Bob -- http://www.qrz.com/db/w2bod Box10 Fedora-20/64bit Linux/XFCE

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