CentOS 5 Hardware :: RAID Mirror Not Loading?
Nov 28, 2009
I recently setup a software RAID1 with two hard drives for testing. I manually unplugged one hard drive to test redundancy and it was fine. I then did the same to the second and plugged back in the first and it was fine. But when I plugged both back in it is only loading one of the mirrors instead of both. I am guessing when the mirror (failed), at least as far as the system knew it removed it from the load sequence to prevent data corruption... how do I go about re-enabling it?.
cat /proc/mdstat
Personalities : [raid1]
md0 : active raid1 sdb1[1]
[code]....
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Mar 1, 2011
So everytime i try and use the "yum" command. for some reason it doesn't go past this point: "loading mirror speeds from cached host files". i cleaned up the cache and rebuilt the OS again, and im still getting this problem. would this be a problem with my internet connection? I'm using CentOS 5.5.
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Mar 22, 2011
How long does hardware Raid card (raid 1, 2 drives)take to mirror a 1 TB drive (500gb used)?Is there a general rule of thumb for this?4 hours? 12 hours? 24 hours?
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Feb 9, 2011
I'm trying to install RubyGems, but when I run:
# yum install rubygems -v
...yum displays "Loading mirror speeds from cached hostfile" and I can't get any further. The same thing happens when I try to run:
# yum upgrade
I'm running CentOS 5.2 on a MediaTemple (dv) server.
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Jul 27, 2009
Currently I am attempting to install Centos 5.2 64bit onto a Supermicro X7DCL-3 motherboard based machine. The Raid recognizes the HDD that's been installed into it, however, the drivers for the raid are not included in the install. After contacting Supermicro I've been supplied with a driver package that should fix the problem.[URL]However, I am still having trouble using the package in order to find the HDD (The only HDD in the machine) that is on the raid.I think I'm doing something that's should be fairly simple, but am screwing it up pretty bad.
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Feb 11, 2010
I have two hard drives inside an Ubuntu 9.10 machine, each with a data partition on. What I want to do is as I save files to one data partition partition (or delete them) I want the files copying/deleted automatically on the the other data partition. I do not want to start using RAID or end-of-day incremental backups.
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Sep 16, 2010
How can I mirror drives on the hardware level? I have a Sun X2270 server with 4 1 terabyte hard drives and need to mirror two drives.
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Apr 18, 2010
I would like to build a NAS from PC (D510MO) running Debian. I have two HDDs (one 3.5 1T and one 2.5 500G).
On 3.5 HDD I have already two partitions 100M+40G dedicated for Win7-64. Now, I want to install Debian (second OS) on this PC and to have some kind of soft RAID or disk mirror of 500G space. I am planning to create a third partition on 3.5 HDD of 500G (identical as 2.5 HDD size) in order to have a mirror 500G space.
Please send my some suggestions on where I have to install Debian; on 500G 2.5HDD or 500G 3.5HDD!Will Debian boot from both HDDs 3.5 or 2.5 after I create the mirror? What Linux soft I have to use for mirroring (mdadm)?
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May 31, 2010
I have a MSI Board that had this hard drive configuration.
200GB x Single EXT4 Ubuntu
320GB x Raid Mirror NTFS
320GB x Raid Mirror NTFS
[code]....
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Sep 22, 2010
when i trying to install any thing from yum.it gives following error.
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
[code]...
what can be the problem.I think it is related to proxy but i am unable to resolve.
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Aug 3, 2010
I am trying to connect a RAID Box to the server via LSI 8880EM2 RAID controller.The raid box is FUjitsu Externus DX60 with raid 1 configured.The server is Fujitsu Primergy SX300 S5 with LSI 8880EM2 RAID card.The external raid box is being recognised by the raid controllers bios.
The server runs CentOS 5.5 64bit. I have installed the megaraid_sas driver from LSI website and MegaCLI utility but CentOS still fails to see the box.MegaCLI utility, when launched from CentOS, recognises the raid box, CentOS does not(no mapping being created in /dev).
I have also tried to create a logical RAID0 HDD on one physical HDD(as seen by MegaCLI) with MegaCLI utility in CentOS.The result was success and the new logical drive could have been used, but when restarting the server, the controllers' bios fails with an error (not surprised(one logical RAID0 on one physical HDD)) and configuration is being erased.
Has anyone tried connecting 8880EM2 controller to a raid box with raid configured on the box, running it all under CentOS and what were the results.
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Apr 15, 2011
Have a customer who is due for a new system. AS they just renewed their RHEL entitlement, they plan on ordering a Dell server without a OS preload. Two questions:
- Will RH let them download RHEL6 just by maintaining the entitlement when their current version is RHEL 3?
- The server will have two RAID arrays - one intended for /home, one for "everything else". As I've never done a clean load with two arrays, how do I select what file systems go on which array?
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Jul 1, 2011
i want install goldendict and source downloaded and i want compile it. for compile i need this packages :
Building under Linux: Make sure you have those dependency packages installed: libvorbis-dev, zlib1g-dev, libhunspell-dev, x11proto-record-dev, qt4-qmake, libqt4-dev, g++, libxtst-dev, libphonon-dev. They can be named slightly different in different distributions
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Jun 26, 2009
I have a server, running Centos 5 and it is working fine. Now I want to have another server (server2), mirror of my current server (server 1) if any time my (sever 1) stopped responding, (server 2) should start working until I fix server 1.
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Nov 6, 2009
I created a local mirror with a DVD Image, is there a way to get this mirror to 5.4 now?I already updated the updates/extras repo, but now my main-repo is outdated and my updates go wrong.my directorystructure looks like this:
/server/rpmrepo/centos/5]
# ls
centosplus extras os updates
and the os folder:[code].....
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Nov 17, 2009
I have create a LVM volume in mirror 1 method, with two hard drives, In that one disk is get failed. How can I manage the data availability and also what I need to do next?
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Apr 27, 2011
I've got a new server built, shaken down and patched (2.6.18-194.el5). Works nicely.
I don't want to rebuild it from scratch if the root drive goes belly up, but I do NOT have a hardware raid controller.
The root disk should be pretty static at this point... any suggestions how I might back it up?
I was thinking I could put in another disk (same size or bigger) and use cron to run something like this nightly: dd if=/dev/sda1 of=/dev/sda2
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Aug 22, 2011
I am trying to create a local mirror/repository for CentOS 5.6 for updates and network installs. I have read the page here on the site about how to do it over and over again, and I still can't figure it out. I have already created the directory, but right after that, I can't go any further. I know this is much easier than I probably think it is. Would someone mind telling me, (in beginners terms) on how to do this? I just want the 'os' package and nothing else.
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Dec 10, 2009
I am going to be using CentOs 5.4 for a home storage server. It will be RAID6 on 6 x 1TB drives. I plan on using an external enclosure which is connected via two SFF-8088 cables (4 drives a piece). I am looking to try and find a non-RAID HBA which would support this external enclosure and allow to use standard linux software raid.
If this is not an option, I'd consider using a hardware based raid card, but they are very expensive. The Adaptec 5085 is one option but is almost $800. If that is what I need for this thing to be solid then that is fine, I will spend the money but I am thinking that software raid may be the way to go.
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Jan 13, 2009
I have a fancy new Quad Core Xeon machine here that I'm trying to install F10 x64 on. The installation went fine. When it reboots the first time, though, I get the dreaded Error Loading OS.
So I dug up my bookmark of the awesome Grub HOWTO here and followed the steps to install Grub manually. Alas, I get the same result after installing it. Even tried doing a makeactive (hd0) just in case, but no luck.
I did more searching and searched for "raid install" but didn't find anything helpful. So here I am... hoping somebody has some insight.
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Oct 11, 2009
I am Setting up 3 HP Proliant servers with 2 250GB Hard Drives in each. How Do I mirror the drives, and link all the servers together??? I am installing Centos 5.3. From the software install menu I installed Gnome, and the Server software, but can't seem to figure out how to get into the server side of it from gnome. Sorry for all the questions, but I have been out of the loop of all this for about 8 years and trying to re-learn everything.
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Apr 1, 2009
I was puzzling over the nss dependence problem that people are having in upgrading 5.2 to 5.3. The issue is clear (that the mirror people are using for [updates] is not pointing to the latest set when an uptodate mirror may be being used for your [base]). My question is though how the mirror list decides whether a mirror is fresh. According to [URL] then this mirror [URL] is "green" which presumably means that the system thinks it is up to date (last probe was 1 hour ago). However if you look at the files on the mirror now (12:54 BST, Apr 1 2009) you see that the date of the 5/ branch is 24-Jun-2008. Thus this host is not ready to give you updates to 5.3. Is this a bug?
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Apr 8, 2009
I am using LVM2 Clustering to mirror logical volumes between 2 different storage arrays ( iscsi target hosts). Everything is up and running fine, but I would like to be able to monitor the status of the mirror(s), and "re-sync" them if necessary.
I have attempted the locate the information from Google. From what I have read, lvdisplay -v should tell me whether the mirrors are in sync, but it either is not, or I am simply miss reading it. I have come also across information stating lvchange -m [ 0 | # ] should be used to add or remove mirror copies. Is the is correct / only way to "resync" a mirror, in the event that I can determine the mirror is actually out sync?
For those who are familiar with Symantec's VERITAS volume manager, I am looking get the equivalent information related to plexes from vxprint, the equivalent function from /etc/vx/bin/vxreattach -br, and the progress information from vxtask list. I hope the information is currently "search challenged", or I am simply not fully comprehending what I have found.
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Jan 11, 2010
I've just set up the local mirror for my 96 CentOS 5 workstations. The mirroring script is taken from public-mirror howto and looks like this:
#!/bin/sh
rsync="/usr/bin/rsync -avHzL --delete --delay-updates" # replaced -q with -v for debuging purposes, removed --bwlimit, added -L to follow symlinks
mirror=centos.politechnika.lublin.pl::CentOS # tried several different same result
[Code]....
I tested mirror consistency by putting the mirror addres I'm syncing with, directly into repo file. Than yumex works fine. I tried several different mirrors with the same result.
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Jan 21, 2010
After reading a lot of docs, I'm still having problems using wget to download a Centos repo from a mirror. Here's my best attempt so far:
$cd /repos/centos/5.4
$wget -r -nH --cut-dirs=3 -np [URL]
Of course I get all the unwanted index files etc, but I seem to get a lot of other downloads from the mirror, not just their 5.4 directory. It's like it's following other links on the web pages. Maybe I should be using "ftp://" instead of "http://" considering it's an ftp site, but I seem to have connection problems that way.
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Jun 15, 2010
since yesterday, this domain has been painful slow and the only fix is removing it from /var/cache/yum/updates/mirrorlist.txt the last straw was about an hour ago, when 10kb/s was the max bandwidth and I had to download perl and glibc * glibc-common it would have taken over an hour. once removed from updates/mirrorlist the other mirrors picked up the slack and I was back in business,
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Jan 13, 2010
I am trying to install Ubuntu on a nvidia board which, based on the forums I have perused, is a FAKERaid chipset. Originally I tried to install according to https://help.ubuntu.com/community/FakeRaidHowto to no avail. I gave up and am resorting to breaking down my raid setup (thus losing my Windows XP installation) and using Linux's software raid (which seems to be the recommended method) with the Alternate CD install.
I went in to the bios and completely disabled my board's RAID function. I then followed the instructions here: https://help.ubuntu.com/community/In...n/SoftwareRAID , except it popped up with a window advising me "one or more serial ATA RAID configurations have been found. Do you wish to activate these RAID devices?" which that page didn't mention. I believe I selected "Yes". Setting up the partitions I made (from beginning of disk to end of disk) a RAID1 200MB /boot partition, a RAID0 / partition (90GB?), free space not set up in RAID (approx 20GB for each SATA drive to later install Windows on [if that's even possible]) & then the SWAP partition 2GB at the end of one of the disks (is it OK that this one wasn't in RAID?).
The installation completed, as far as I can tell, without a hitch. Except also of note: my network card doesn't work in the installer (gives an error message about unable to configure dhcp) so i'm not connected to the internet. Then I restart and the following appears: grub loading: error: biosdisk read error. Followed by what appears to be the Ubuntu loading splash (just a small white shape in the middle of the screen), and then:
[Code]....
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Dec 7, 2010
I'm working on a server and noticed that the to RAID5 setup is showing 4 Raid devices but only 3 Total devices. It's on a fully updated CentOS 5 system that only has three SATA drives, as it can not hold anymore. I've done some researching but am unable to remove the fourth device, which is listed as removed. The full output of `mdadm -D /dev/md2` can be see below. I've never run into this situation before.Anyone have any pointers on how I can reduced the Raid Devices from 4 to 3? I have tried
mdadm /dev/md2 -r failed
mdadm /dev/md2 -r detached
but neither work and since there is no block device listed I'm not quite sure how to get things back in sync so it's only seeing the three drives.
/dev/md2:
Version : 0.90
Creation Time : Tue May 25 11:07:04 2010
Raid Level : raid5
[code]....
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Feb 15, 2009
The installer can't see my raid controller (I assume) as I'm getting the following error:"Error opening /dev/mapper/isw_jbhgjgjj_Vol0: No such device or address"It just sees them as 4 individual drives: sda, sdb, sdc and sdd.Please note that I have set up the RAID 5 in the controller bios interface and the image name is Vol0, which it seems that it tries to load but for some particular reason it can't.I have also tried different bios settings and nothing worked.
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Jan 13, 2010
My problem is that I'm trying to install CentOS 5.4 x86_64 DVD ISO on Supermicro X7SBI server with installed Adaptec RAID 3405 controller.
I created RAID 5 array and is working fine (adaptec status says Optimal) but I can't install CentOS to that array (1.5TB size).
Whenever I try to install with: linux dd
I'm asked for a driver, which I have downloaded from Adaptec site and extracted contents to USB drive (in installation found as /sba1) which has now a lot of IMG and some ISO files on it.
I try to load (I simplified names) RHEL5.img, CENTOS.img... with x64 names (one exact name: aacraid driverdisk-CentOS-x86_64.img) and I always get the error message: "No devices of the appropriate type were found on this driver disk"
This is going on for a week now and I can't find the right driver or something I'm doing wrong to get install done.
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