CentOS 5 :: Running Centos From USB As Hard Disk?
Sep 1, 2010
I have seen that is possible to boot from a USB stick and use a USB memory as hard drive.I have a server enable to hold 6 sata drives 3.5", But I want to use the 6 drives and make a Raid-5 setup for backups 5 -1 spare. /boot cannot be on a raid-5 level 0 or 1. But I want to have redundancy for my OS, them I can install Centos on a Raid-1 using 2 disk, which let me only 4 for the raid 5. I will run a backup I want to have a lot of space.
Using 4 disk for raid-5 2 TB I will have 6TB no spare, no spare is not a good option at least I will prefer 1 spare.Well, I was thinking, the server MoBo have USB support, if I open the box I can see the small entrances, If Centos let me installed on a USB memory drive, can I trust a USB memory stick?t night with bacula.
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Feb 27, 2011
I would like to build a bootable system image on an attached hard disk on a running CentOS machine.The hard disk would be moved to a headless server, where only SSH access would be available. It seems that all the documented install methods assume that the installation runs on the taget machine. In this case, I would like to create a bootable system image of CentOS on a running host system. The new install mage would generally have a newer version of CentOS than the running host system where the image is created. Also, I would prefer
to do a text-based install.
The reason for all this is that I have network access to several remote machines. I can ask disks to be moved between machines, but I have no physical access. In order to do software testing, I would like to have several system disks with different installed CentOS versions. It would be easer if I could build the system disks on one single machine. The hardware an all machines is very nearly identical.
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Feb 18, 2010
I am trying to install CentOS 5.2, and the installation ran out of disk space after running for about 2 hours.I checked the FAQ, and it said 1.2 GB. The disk is 3 GB. The default install was selected, and I think that it checks for sufficient available disk space before installing. Still, it ran for quite a while before announcing that it was out of disk space.The Installation Guide is not very helpful, since there is a blank page where the disk space requirement is supposed to be. I just picked the default installation. A search of the forums on "not enough disk space" did not return much.
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Jun 3, 2010
Move centos to another hard disk?
My box is centos 5.4 x86 on one hrad disk. Now I have a problem at this hard disk, so I want to ove centos to another hrad disk.
But backing up centos and restoring them another hard disk is not so easy and takes so much time.
I heard Partimage" can backup hrard disk and restoring it to another hard disk.
[URL]
My box has one LVM composed 3 partitions on one hard disk.
Can I move centos to another hard disk with partimage?
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Apr 2, 2009
i have Cent OS 5.2 CD (6) with me. I need to install it in my hard disk. I have already installed Windows XP in C: partition. I need to install Cent OS in D: partition. During installation process its asking for hard disk partition. In this regard, how to select the partition. I have C,D,E and F partitions and C,E and F are in common use. So i have to install Cent OS in D partition.
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Apr 3, 2009
Especially /var because I am running a MYSQL server on this box. I want to know if there is a safe procedure to follow to move these partitions from the current sda2 and sda3 that they are now to sdb2 and sbd3 because this is a much bigger disk. I don't want to break MYSQL and I don't want to be down for a long period. I have heard of some people suggesting a sym link to a /newvar and /newuser on sdb but I have also read this will not work when moving to a different physical drive.
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Dec 29, 2009
Can some one tell me how many space does a plan CentOS 5.4 take and the minium size of the memory.
Also, what is the minium size I have to partition on /boot
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Mar 3, 2011
I want to install Cent OS5 on my machine. The Hard Disk is SATA. I want to discuss about how to custom partition the hard disk. In the old version there is a drop down list for manual partition the hard disk. like /,boot,swap,var etc etc. In the new version of centos 5 I can not see things like that. During installation process and in partition page there are things like:
Code:
Remove all partitions on selected drives and create default layout.
Remove Linux partitions on selected drives and create default layout.
Use free space on selected drives and create default layout.
Create custom layout.
When I choose custom layout it show me an error message. "An error has occurred-no invalid devices were found on which to create new files system. Please check your hardware for the cause of this problem."
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Jul 1, 2010
I need to install a voice recording application on a server.My problem is that I have four hard disks with 150 GB storage space each. So I have 150*4 = 600 GB Storage available as whole .I need all four hard drives (600 GB ) as single volume to store and retrieve recording .
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Nov 7, 2010
I just invested nearly 12 hours configuring a CCTV system using CentOS 5.5 Server and Zoneminder. I have it setup just the way I want it. I would like to make a clone image of the drive just in case disaster strikes (lightning strike, failed hard disk, etc). In the Windows PC world, I use a program called Ghost to make a mirror image of a hard disk. I power the computer down, run Ghost to make a block level clone of the drive, then power it back up. Can I assume that will work with CentOS without problem?
In the computer now is a 320GB SATA drive. One partition on it is swap, and the other is ext3. There is no raid setup on the drive. I have an identical 320GB drive I could use and keep it in the computer unplugged from the power and not spinning. That way if anything ever happens, I can power down, move the power and data cable to the new drive and power it back up. Granted, I will lose any new config and database changes, but it will be a lot better than starting back at square 1 and reconfiguring the entire OS and software.
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Apr 26, 2009
A while back I decided to use CentOS as my main day to day operating system :) Previously I was mainly using Fedora (old Red Hat <9.x) and occasionally Debian / Debian based distros.Since I am running CentOS on a Dell M1530 laptop I am concerned by the Load Cycle issue that plagues many laptop hard disks due to aggressive default power management. For those of you who are not aware of the Load Cycle issue please refer to the following link from Ubuntu forums which documents it really well:URL...
In Fedora and various other distros I have successfully used Laptop Mode Tools URL... to help set the hard disk APM value meaning the hard disk would stop rapidly increasing the Load Cycle value when running on mains. The setting I choose to use was hdparm -B 254 /dev/sda when the laptop is running off of mains power and set in scripts supplied with the Laptop Mode Tools RPM which will run as a service.
The problem I am having with CentOS is I can't get Laptop Mode Tools to run as a service either from the RPMForge repo (old version) or by installing the latest Fedora version from Laptop Mode Tools site above. I am therefore having to manually set hdparm -B 254 /dev/sda when running which I occasionally forget An error is seen during boot but which changes the CentOS boot to verbose mode but I am unable to locate the error in any of the /var/log files so I can put it in here.Can anyone suggest a way of creating a script suitable for CentOS which will auto apply the above (or other) power saving value for when a laptop is running off of mains power?If anyone can also advise how I can confirm what the error is I can also forward it to the author of Laptop Mode Tools.
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Jan 8, 2010
i want to configure a cluster for combining CPU / RAM / Hard disk
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Jan 13, 2010
I have a server with two hard disks SATA (500 GB), I installed centos in one of them, desire to know how I can mount the other hard disk empty and without format, so that this hard disk always appears mounted when "reboot" the system.
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Feb 18, 2010
server is :intel 5000p ,2gX4 ram ,cpu 5405 X13 sata sda 500g sata use for system rootfilesystem primate mastersdb 500g sata use for data filesystem second mastersdc 500g sata use for data filesystem second slavebios set use enhance and ide i install centos5.4 x86_64 on sda when i install system on sda, sdb and sdc is offline.after system install sucess ,poweroff and add sdb and sdc when system kernel start report ata0 error or ata1 error. exp XXXX (rydy).but when only add sdb or sdc ,system can startup and use all service ,exp vncserver ,kvm,pptp..
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Feb 20, 2010
I am trying to port the current Fedora4 system to the CentOS5 on a new hard disk. Actually, the Fedora4 system is constantly being hacked due to my lazy update. So i prefer a fresh install of CentOS5. I am not clear what files need copy and what does not need for ease and for avoiding possible backdoors.
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May 31, 2010
This is Mushtaq here. I am using CentOS 5.3. Everything works fine regarding Hardware Support except of External Hard Disk. I have a HDD Western Digital 80 GB in USB converted case. Its working fine under WinOS, Fedora 10 / 11 / 12 + & RedHat Enterprise Linux. But CentOS is unable to access it even it does not detect it (fdisk -l command is used to verify the connected disks). Can any one please help me in this regard, I am fed-up of this situation.
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Feb 1, 2011
We have had a hardisk crash in our RAID1 webhosting server running CentOS5 and Plesk. We first realized something was wrong when our main site didn't load but showed MySQL errors. We then found out that the system was in read-only state. Something that also happened the day before yesterday, but we could fix with a FSCK. Then the system worked well til around 18 hours later when it crashed with the same sympoms. So, we rebooted the server and wanted to do a filesystem check again. But the HDD wouldnt even load. It was gone. Unfortunatelly it was not realized that the second disk in the system was also not working any more for some time now. Fortunatelly we had our main site backed up externally though. So we could re-install a fresh box and mounted the two drives to the system. We checked the harddisk. One is practically empty (the older one), the other has almost only files in 'lost + found' but these are all "numbered", no real filenames or so.
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Dec 6, 2009
I've just installed CentOS 5.4 on my Thinkpad T43. Everything works fine except one thing that, when I suspend the machine, the hard disk is always shut off in a "hard way". The sound is similar to the one you would hear when shutting down the machine by keeping pressing on the power button.. this is no good.
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Oct 30, 2009
I've got two USB webcams I'm trying to get running with CentOS 5.4 x86_64. I've downloaded and installed the gspca driver from http://mxhaard.free.fr/spca5xx.html. Running lsusb yields:
Bus 002 Device 003: ID 0ac8:307b Z-Star Microelectronics Corp. USB 1.1 Webcam
Bus 002 Device 002: ID 0ac8:307b Z-Star Microelectronics Corp. USB 1.1 Webcam
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Nov 10, 2009
I am having new hardware and IDE driver for that hardware as drive disk image (it8213_centos53.img). CentOS 5.3 installation is working fine with drive disk image at USB and CentOS 5.3 at DVD. Our application uses CentOS 5.3 and we build a custom kick-start ISO for installations. Using that ISO client is going to install on all hardware boxes.
Note while installing :
a) No network connection is avalible.
b) No USB isavalible.
c) No floppy is avalible.
d) Only single CD-ROM is avalible.
So, is it possible to build single custom kick-start CentOS 5.3 ISO which contains dirve disk image and entire installation will be done using that image. If so please let me know the steps to build it.
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Mar 23, 2010
I have just clone from my previous IDE hard disk to a bigger IDE hard disk with clonezilla. However, when I boot my system with the new hard disk using the installation disk, it says an error that "no linux partition found on hard disk".
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Oct 6, 2010
I'm looking for a simple solution to backup my CentOS Server (5.x) on a daily base to a mounted disk. I found the glastree tool but I have no clue if it will work on CentOS.All recommendations, tipps, hints and maybe scripts are welcome. Unfortunatelly I'm an Linux newbie and starting with Linux CentOS a couple of weeks ago
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Jun 26, 2011
I need to read information from SUN hard disks which are about a decade old. My CentOS 5.6 mount command comes from util-linux 2.13-pre7."mount -t ufs -o ufstype=sun /dev/sdb2 /New" reports "mount: unknown filesystem type 'ufs'", though its man page describes such settings.How could I read an external UltraSCSI hard disk (yes: high pitch noise and only 9 GB capacity) on a current CentOS? Is that possible at all?
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Apr 10, 2009
the HDAPS system in IBM / Lenovo Thinkpad laptops is, in principle, supported by the hdaps kernel module. However, it is actually *useless* since it refuses to load on current models which report Lenovo as vendor ID instead of IBM The alternative is the tp_smapi module which, according to ThinkWiki, is strongly recommended anyway. It is not available in any CentOS repo, so I tried to compile it. However, I get the following error:
/root/devel/tp_smapi-0.40/tp_smapi.c: In function tp_suspend:
/root/devel/tp_smapi-0.40/tp_smapi.c:1241: error: PM_EVENT_HIBERNATE undeclared (first use in this function)
/root/devel/tp_smapi-0.40/tp_smapi.c:1241: error: (Each undeclared identifier is reported only once
/root/devel/tp_smapi-0.40/tp_smapi.c:1241: error: for each function it appears in.)
make[3]: *** [/root/devel/tp_smapi-0.40/tp_smapi.o] Error 1
make[2]: *** [_module_/root/devel/tp_smapi-0.40] Error 2
[Code]..
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Feb 28, 2010
i wanna ask if it's possible to install centos on hard2 while am running centos on hard1 then after installation is complete boot from the second hard drive. i dont have physical access to the server, all i can is connect to it through SSH. so is it possible to install centos on the second hard drive from CLI! then boot from it?
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May 18, 2010
I have a Dell E5400 laptop running parallels with guest OS of CentOS 5.4. My problem is when I'm connected via Ethernet all connections are good. When I go wireless, CentOS is dead via network connections. Now according to Dell, I have a DELL 1397 mini card as my wireless card. Searches on the web state that the dell 1397 is another name for Broadcom 43xx wireless card. So after following any information I retrieved from the forum on trying to get the wireless connection up, I'm still having problems. Here is the latest error trying to build a driver using the hybrid_wl software from broadcom:
make -C /lib/modules/`uname -r`/build M=`pwd`
make: Entering directory `/usr/src/kernels/2.6.18-164.15.1.el5-i686'
CC [M] /usr/local/src/hybrid_wl/src/shared/linux_osl.o
CC [M] /usr/local/src/hybrid_wl/src/wl/sys/wl_linux.o
CC [M] /usr/local/src/hybrid_wl/src/wl/sys/wl_iw.o
[Code]...
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Jun 3, 2010
I am running a CentOS 5.5 system which does NOT support VT Technology, so I am unable to use Xen HV. I am very happy with OpenVZ other than the fact that it doesn't support Windows, only Linux.I'd like to have VMWare Server 2.x installed, but it appears that OpenVZ changes the Kernel to, in my case, 2.6.18-194.3.1.el5.028stab069.6. The default kernel on my system is 2.6.18-194.3.1.el5.i386.If I change grub to load 2.6.18-194.3.1.el5.i386, VMWare will work but OpenVZ will not. If I change grub to load 2.6.18-194.3.1.el5.028stab069.6, OpenVZ will work, but VMWare will not.If I try to run /usr/bin/vmware-config.pl while in the 2.6.18-194.3.1.el5.028stab069.6 kernel, I get an error of:
None of the pre-built vmmon modules for VMware Server is suitable for your running kernel. Do you want this program to try to build the vmmon module for your system (you need to have a C compiler installed on your system)?Using compiler "/usr/bin/gcc". Use environment variable CC to override.
What is the location of the directory of C header files that match your running kernel?[/usr/ src/ linux/ include]I'm so lost as what to do now..is there anyway I can compile both of the kernels together somehow?
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Jul 6, 2010
I managed to install xdebug from pecl, using the php-pear package from Centos base.
However, when trying to install PHPUnit i get an error saying I need at least PEAR >= 1.8.x
Has anyone managed to get a later version of PEAR running on Centos please?
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Aug 10, 2009
My dvd is broken. I always failed to install centos from network because of wrong configuration of tftp server. I'd like to install centos from harddrive. I got a litle application named grub4dos, I try to use it but never succeded. Therefore, I have tow questions:
1. How to install Centos from / through hard drive? 2. Where should I put the Iso file of centos or centos installation files, if i use grub4dos.
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Apr 20, 2010
I have a server with 10 disks 1TB with RAID 5, and I want to install CentOS 5.4 on this disk, but fail
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