Installing Xen On CentOS With SATA

Feb 16, 2008

I've got a 'virgin' machine from Nocster running CentOS 5, including a SATA drive (shows up as "SCSI").

It looks like it'll be a straight-forward install [url], but I wondered if anyone has had this exact combination before and if there are any problems I should expect? Given that it's a dedicated machine I don't have physical access to, I'm slightly paranoid about screwing up.

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SATA Drives :: Detected Within The BIOS But Not In CentOS

Feb 1, 2008

I installed 2 SATA raptors drives on my server. I formatted/partitioned one of the drives through WHM. After rebooting both drives disappeared. They are still detected within the BIOS but not in CentOS. It is possible that I installed a wrong driver or made a bad configuration change.

Server Info:

CentOS 4.6 64bit
Motherboard: [url]OS is running on a 250GB IDE drive
2 SATA WD Raptors (That I am trying to get to work)

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Intel DG35EC +CentOS 5.x Horrible Write Speed By ICH8 SATA Controller

May 5, 2009

we've been testing CentOS 5.3 on Intel DG35EC board (G35+ICH8+82566 Gb NIC), and found that the write speed out of 7200rpm SATA-II drive, connected to on-board ICH8 controller, is consistently under 10MB/sec which is quite horrible!

the same set of hardware can get 100MB+/sec transfer rate with Debian 5.0 and FreeBSD 7.1, just not the CentOS5.3! it doesn't matter whether AHCI mode is selected in BIOS or not, and of course BIOS has been updated with latest version.

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Installing CentOS

Jul 9, 2008

I'm testing out the old version of CentOS which is CentOS 2.1 on Virtual PC and I'm running into some problems. After installation of CentOS, it asks me to reboot the system so then I reboot it. Then it prompts me for the login and password.

I type in "root" and my password. Then I'm stuck inside this command prompt that says:

[root@localhost root]#

Now, how exactly do I get into CentOS graphical user interface, or is this it?

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Installing VNC On CentOS 4.5

Aug 12, 2007

Ive gotten all of it to work.. but instead of using SSH (caus I really dont understand it) Am I able to install VNC? And just connect + use the desktop like that?

my question is pretty much can I install VNC on CentOS 4.5 using SSH?

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Installing ImageMagick On CentOS

Aug 20, 2007

I'm trying to install imagemagick on centos using yum... I did the yum update, then tried 'yum install ImageMagick', but that didn't work - "Nothing to do". I also tried the i386 RPM, which also did not work, I'm missing a bunch of dependencies, has anyone installed this on CentOS know of a specific rpm or another way to install? Ideally, without installing through source.

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Installing Open VPN On CentOS

Nov 11, 2008

I followed a combination of this tutorial:[URL]and this tutorial [URL] (I had to use a combination since following each individually brought up errors along the way).

Anyhow, installing OpenVPN was a breeze but I think I am getting hung up on the configuration part. Basically after generating all of the certificate files and stuff, when i try to "service openvpn start" i just get the message "FAILED".

Where do I look to see what the reason for the failed start could be?

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Installing CentOS 5.2 On New Server

Jul 4, 2008

I decided to go with Cent OS after reading about it in the forums here, but I've had nothing but problems trying to install it. I first tried to do a net install but the installation took nearly an entire day because it would keep popping up messages about corrupt files when downloading the package files. Eventually it just gave up or rebooted because I came in in the morning to find it at a message saying "No OS installed". I then burned all 7 installation disks and tried that way, still got a few of the corrupt file messages (but far fewer than the previous time) and made it through the installation only to still have it say "no os installed" again after the reboot. I thought maybe it had something to do with the fact that I was not installing a boot loader (there is no other OS installed anyways) but when I tried to reinstall a third time, this time with the boot loader, it now says that the CD drive (USB) is already mounted on tty2 and I can't even start the installation? WTH!

The server is a Dell PowerEdge R300 with two Intel Core 2 Duo 64-bit processors. I'm using the x86_64 ISOs from the mirrors.

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Installing CentOS Manually

Jul 8, 2008

how to install CentOS by not using the installer. This guide should be great when installing over networks, don't have a graphical console available (for installing over serial), when you're not content with the installer's job, installing CentOS from another distro, or plainly want to learn more about how CentOS works.

* Have a host OS that has the "rpm" package manager available. Some distributions have it in their repositories (even if the package manager for the distro itself is not rpm), and knoppix (a linux live/rescue CD) has it aboard too. You can use the first CentOS ISO CD too (use linux rescue at boot), and it has all the necessairy packages aboard
* Access to the CentOS base repository. It's on the first CentOS ISO CD
* Use your BRAIN. This guide is ment to be interpreted, not copy/pasted

# First, setup your disks to your liking. You can use whatever you want here,
# RAID, LVM, etc... Remember your disk configuration because you'll need it
# to configure grub, menu.lst and fstab. Using RAID, LVM, or others will require
# more configuration than this guide covers. To keep it simple I'm using a
# single disk. An example:

$ fdisk /dev/sda
$ mount /dev/sda3 /target
$ mkdir /target/boot
$ mount /dev/sda1 /target/boot

# Depending on the host OS you're using, you may need to initialize the rpm db
# on the host OS
$ rpm --initdb

# Use the following command to install the packages. I'll be addressing this
# command as $rpm.

$ rpm --root /target -i

# Use your shell's tab completion to complete the package filenames. I
# deliberatly left out the versions so these instructions apply to a wide range
# of versions

# Let's install some basics
$rpm setup basesystem filesystem

# Install bash first, this is needed for post-install scripts
$rpm bash glibc glibc-common termcap libgcc tzdata mktemp libtermcap

# Install some dependencies (this is mainly to keep the next command smaller)
$rpm grep pcre libstdc++ info ncurses zlib gawk sed ethtool

# Install the bulk of the system
$rpm coreutils libselinux libacl libattr pam audit-libs cracklib-dicts
cracklib libsepol mcstrans libcap chkconfig python db4 openssl readline
bzip2-libs gdbm findutils krb5-libs initscripts util-linux popt udev MAKEDEV
centos-release shadow-utils keyutils-libs iproute sysfsutils SysVinit
net-tools module-init-tools e2fsprogs e2fsprogs-libs glib2 mingetty
device-mapper sysklogd psmisc centos-release-notes procps libsysfs iputils

# Install package manager
$rpm rpm beecrypt elfutils-libelf rpm-libs sqlite

# Install YUM
$rpm yum python-elementtree rpm-python yum-metadata-parser python-sqlite
expat libxml2 python-urlgrabber m2crypto python-iniparse

# You may also want to install your favorite editor
$rpm nano

# This provides /root with some defaults, like color highlighting on `ls`
$rpm rootfiles

# Right now you have system which you can chroot to, so we can start setting up
# the basics

# Mount directories for chroot operation
$ mount --bind /dev /target/dev
$ mount -t proc none /target/proc
$ mount -t sysfs none /target/sysfs
$ chroot /target

# This constructs /etc/shadow
$ pwconv

# Configure fstab
$ nano -w /etc/fstab

# Installing the kernel. Do this back outside the chroot in the host OS system
$ exit
$rpm kernel mkinitrd cpio device-mapper-multipath dmraid gzip kpartx lvm2 nash
tar less device-mapper-event

# Install the bootloader, grub.
$rpm grub diffutils redhat-logos

# Let's chroot again to configure our bootloader
$ chroot /target

# We start by configuring the bootloader. Open /boot/grub/menu.lst, and put the
# following there

timeout 5
default 0

# (0) CentOS
title CentOS
root (hd0,0)
kernel /vmlinuz-2.6.18-92.el5 root=/dev/sda3 ro
initrd /initrd-2.6.18-92.el5.img

# If this command gives an error, you can safely ignore this because it's not
# of importance. What is important is that grub-install copied the right files
# to /boot/grub that we need for booting.
$ /sbin/grub-install /dev/sda

# Manually install grub if the previous step failed. - means type it in the grub
# shell
$ grub
$- root (hd0,0)
$- setup (hd0)

# Optional packages
# You may want to install passwd so you can set passwords ;-)
$rpm passwd libuser openldap cyrus-sasl-lib

# These are used to set the keyboard language (loadkeys)
$rpm kbd usermode

# ** Right now you should have a bootable system! Here are some tips to help you
# through your 1st boot ***

# Most of the system configuration happens in /etc/sysconfig. See


for full documentation.

Some quick post-install tips:
* Configure your keyboard in
using the KEYTABLE variable

* Configure networking
Take a look at /etc/sysconfig/network-scripts. See ifcfg-lo for an example.

# This recreates the RPM database. If the host OS you used has a different
# version of db, rpm will complain with
# rpmdb: unable to lock mutex: Invalid argument
$ rpmdb --rebuilddb

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Installing CentOS 4.4 From A Floppy

Apr 27, 2007

Apparently on of my colo customers sent the server without the OS or CD drive, and wants us to install CentOS 4.4 64 bit.

Any way to get "download" version of it, put it on a floppy, put it in the server and let the server download the rest from the internet (after we enter the IP info, so it can connect)?

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Installing HyperVM On CentOS- W/ YUM

Nov 4, 2007

I'm trying to install HyperVM like the following:

[root@server ~]# sh ./ --virtualization-type=openvz
Here is the output it's returning to me (From log file)

Installing packages which lxlighttpd zip unzip lxphp lxzend curl mysql mysql-server mysqlclient10...
Setting up Install Process
Setting up repositories
Reading repository metadata in from local files
Excluding Packages in global exclude list
Parsing package install arguments
Resolving Dependencies
--> Populating transaction set with selected packages. Please wait.
---> Package lxphp.i386 0:5.2.1-90 set to be updated
---> Package lxzend.i386 0:3.3-lxa set to be updated
---> Package lxlighttpd.i386 0:1.4.13-1 set to be updated
--> Running transaction check
--> Processing Dependency: for package: lxphp
--> Processing Dependency: for package: lxphp
--> Finished Dependency Resolution
Up2date Gave Error... Trying Again...

This continues to loop

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Installing Yum On CentOS + Plesk (Virtuozzo) VPS

Jul 21, 2008

I found this tutorial on how to install yum. The only issue is, we have CentOS 5. Is there a more recent article with the latest files needed to install yum on CentOS5 / Plesk VPS?


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7200 Rpm Sata With Raid 10 Vs 10000 Rpm Sata With Raid1

Dec 19, 2008

about the hd,there are two options, the first one is four 7200rpm sata to do raid 10,
the second one is two 10000rpm sata to do raid 1, about the performance, which one will be better?

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CentOS 5 - Problem Installing OpenVZ Kernel

Jun 22, 2008

Just to make things clear, i am not new at setting up VPS nodes, i have set up all of my servers with the HyperVM/OpenVZ setup and they work perfectly, but im having a problem with a new server.

Just received my new server, installed HyperVM-Slave, rebooted but the OpenVZ kernel was not installed for some reason, so i manually installed the OpenVZ Kernel using the RPM as yum seemed to install the wrong kernel.

I then installed the kernel using RPM and got this error at the end of installation:

grubby: unable to open /dev/hda: No such file or directory
grubby: unable to open /boot/boot.b: No such file or directory
grubby fatal error: unable to find a suitable template

I have never encountered this error with any of my other servers before...

Also after installation everything seems to be correct. /etc/grub.conf has the new OpenVZ kernel displayed, and default is set to 0, so upon startup it should be booting the correct kernel, but the thing is, when i reboot the machine the default kernel is loaded even though the grub.conf is configured to load the OpenVZ Kernel.

Im thinking that this may be due to the error i got when installing the kernel.

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Installing GPAC On Cpanel Based Centos

Apr 28, 2009

Anybody have successfully installed GPAC in Centos system?

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Plesk 12.x / Linux :: Installing Magento (Centos 7)

Oct 11, 2014

I am trying to install a magento on Plesk Version 12.0.18 Update #19 / CentOS Linux 7.0.1406 (Core).

Plesk is reporting that it cant install magento because php-mcrypt is missing. So I tried the following:


1) rpm -ivh [URL] ....
2) yum update
3) yum install php-mcrypt

Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base:
* epel:
* extras:
* updates:

[Code] ......

What can i do to install mcrypt without breaking other dependencies ?

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SATA 7k RAID 1 Vs. 2xSATA 10k Vs. SATA+SAS

Jul 3, 2008

I'm currently in the process of ordering a new server and would like to throw another $50-$70 at the default SATA II 7k 250 GB to increase performance. The server will host a site similar to WHT (php, mysql, and some forum traffic ).

There are three options I can get for the price:

1. Add another SATA II 7k 250 GB and set up RAID 1
2. Add a 73GB 15k RPM SA-SCSI and put mySQL on it. No RAID.
3. Toss out the SATA II 7k and take two SATA 10k 150 GB instead. Put mySQL on one of them. No RAID.

Please keep in mind that the question is budget-related (I know I can get more if I spend an extra $200 but that's not what I want ). Which of the above will make me happiest?

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Plesk 12.x / Linux :: Installing Mcrypt On Linux Centos 5.5 PHP 5.3.3

Jun 20, 2014

I am trying to install Magento on my apache server. I am running into the dreaded mcrypt issue as Magento needs it to run. I have now been googling for the past few hours and have gotten nowhere.

Here are my details:

Centos 5.5
PHP 5.3.3
Plesk 12

I have tried installing all sorts of different repos and it just isn't working.

When I try to install using # yum install php-mcrypt I get the following:

Loaded plugins: fastestmirror
Package php-mysql is obsoleted by php-mysqlnd, trying to install php-mysqlnd-5.5.13-3.el5.remi.x86_64 instead
--> Processing Dependency: php53-gd for package: psa-php53-configurator
--> Processing Dependency: php53-imap for package: psa-php53-configurator


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Am I Really On A SATA

Mar 28, 2009

I rented a new server. I check WD6400AAKS, it's indeed a SATA drive. However, why is the label says hda and hdc? Isn't it supposed to be sda and sdc?

Is it true DMA is not needed for my SATA?

Is my disk performance to slow? Does the performance suggest it's a IDE disk?

Here is what on my WHM

hda: WDC WD6400AAKS-65A7B0, ATA DISK drive
hdc: WDC WD6400AAKS-65A7B0, ATA DISK drive
hda: max request size: 512KiB
hda: 1250263728 sectors (640135 MB) w/16384KiB Cache, CHS=65535/255/63
hda: cache flushes supported
hdc: max request size: 512KiB
hdc: 1250263728 sectors (640135 MB) w/16384KiB Cache, CHS=65535/255/63
hdc: cache flushes supported

root@abc [~]# hdparm /dev/hda

multcount = 16 (on)
IO_support = 1 (32-bit)
unmaskirq = 1 (on)
using_dma = 0 (off)
keepsettings = 0 (off)
readonly = 0 (off)
readahead = 256 (on)
geometry = 65535/255/63, sectors = 1250263728, start = 0
root@abc [~]# hdparm -Tt /dev/hda

Timing cached reads: 12040 MB in 1.99 seconds = 6036.46 MB/sec
Timing buffered disk reads: 24 MB in 3.20 seconds = 7.49 MB/sec

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Oct 26, 2009

Maybe what the advantages/disadvantages are of each in regards to a web hosting configuration?

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Jun 11, 2009

about SSD vs SCSI vs SATA HDDs?

I heard that SSD are slow in writing, but fast in reading.
is this true?

80GB Intel X25-M SSD is the model i am looking at.

Is this HDD recommended on servers? will this perform better then SCSI or SATA RAID10?

how this works, tell me more about writing

eading speeds (on SSD) etc.

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Scsi Vs Sata

Apr 30, 2008

what is the benefit of scsi upon a sata hdisk

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Mar 6, 2008

I have ordered a dedicated server SATA Xeon but got IDE Xeon. Should I contact my datacenter to change the server or is ide and sata the same thing and it does not make a real difference.

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SAS / SATA Compatibility

Nov 19, 2008

SAS/SATA compatibility

I am looking to buy this barebones system:[url]

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SAS Vs SATA II Performance

Nov 26, 2008

On a normal shared hosting server, what kind of performance gains can you see using a SAS drive instead of a SATA II in raid-1?

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May 13, 2008

I wonder which drive give the best performance? Look like they all have the same 15000 rpm. :d

Any experience?

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Dec 28, 2007

I currently have a Dell Poweredge 2650 from a few years back, it is running...

2x Xeon 2.4ghz 512K

Back in the day this system cost $2000, now it's not worth close to that.

So my plans were to dump this bad boy as an SQL server, seeing it has the SCSI backplane and 3GB of RAM, and SQL usually doesn't need as much CPU as a web server.

Now my question, would it be better to use this server or would it be better to build a cheap Core 2 Duo with a RAID0 array with a few SATA drives?

Before you start going off on RAID0, it doesn't matter to me because I am using clustering/failover so data will not be lost and no downtime will be received if the array fails.

Basically what I want to know, is it worth it to keep this server and build upon it or would it be better to sell this server and look into spending an extra few hundred to build a new system with SATA RAID.

I'm going by price/performance rather than reliability as I am using failover to let you know once again .

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SCSI To SATA Adapter

Sep 2, 2009

I am looking for something like this:


To work on an HP ProLiant DL360/380. All I know is they are SCSI U320 drive bays, or that is the type of drive they take. Can anyone provide any insight on what may work? We are trying to get a more cost effective way to get more storage into a server. The largest SCSI drive I can find is 300GB for $200. You can get 2TB drives for that much these days.

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Is A Raptor 10K Rpm Better Or A SATA Drive

Apr 11, 2008

For a server would a Raptor (10K rpm) Do better than same capacity SATA-2drive?

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Is SA-SCSI 10K RPM Is Far Away Better Than Raptor SATA 10K

Oct 26, 2008

I'm going to use it for a massive SQL database driven site.

Was wondering if SA-SCSI 10K RPM is far away better than Raptor SATA 10K if combined with quad core processor and 8GB RAM?

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SCSI, SAS Vs SATA II Reliability

Apr 11, 2008

is it really worth the money nowadays to put in SCSI or SAS instead of SATAII (single disk, non-raid here), IF reliability is the only concern (i.e. NOT i/o performance) during the usual 3 year life time of a server?

Actually, I was pretty amazed by the sata reliability, in the past 3 years the only hdd failure was two sata on a mismatched mobo, which didn't support SATAII (a lot of read/write error, eventually died). Although we have 0% scsi and sas failure.

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