Red Hat / Fedora :: RAID Level For Servers?
Sep 1, 2010How can we know which Raid level is useful for the server E.g Mail, Web, Database server. Also things we can keep in mind before configuring RAID / LVM on live servers.
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Fedora Servers :: Convert A Running System To RAID Level 1?
Sep 30, 2009I was recently requested to try and convert a running system to RAID level 1. I did not succeed in this task. However, I am still interested in accomplishing this task in a test environment.What I did was create a RAID device with a device missing e.g.
mdadm --create /dev/md0 --level=1 --raid-devices=2 missing /dev/sdb2
Once the RAID was up and running I created the /etc/mdadm.conf file so that it would activate the RAID device on boot. Once the device was created I copied all the data from the running root filesystem to the /dev/md0 device. The only directory that I didn't copy was the /proc directory. When I rebooted the machine I had a kernel panic and the system couldn't find /dev/root. I would greatly appreciate it if someone could provide some information/tips regarding the problem.
Ubuntu Servers :: Changing RAID Level On An Existing Server
Mar 9, 2011We have been using Ubuntu Server at our department since several months now. It hosts a website, e-mail and nfs(only intra).
It was set-up as RAID 0 with two 1TB Hard drives but I want to change it to RAID 1 for fault tolerance. Is it possible to change existing RAID level? If yes can someone point me to the proper place?
I tried "mdadm" documentation and level set option is available but no explanation available that whether it is only while creating the array or it can change the level too.
Ubuntu Servers :: RAID-5 Recovery (spare/active) / Degraded And Can't Create Raid ,auto Stop Raid [md1]?
Feb 1, 2011Could any RAID gurus kindly assist me on the following RAID-5 issue?I have an mdadm-created RAID5 array consisting of 4 discs. One of the discs was dropping out, so I decided to replace it. Somehow, this went terribly wrong and I succeeded in marking two of the drives as faulty, and the re-adding them as spare.
Now the array is (logically) no longer able to start:
mdadm: Not enough devices to start the array.Degraded and can't create RAID ,auto stop RAID [md1]
I was able to examine the disks though:
Code:
root@127.0.0.1:/etc# mdadm --examine /dev/sdb2
/dev/sdb2:
Magic : a92b4efc
Version : 00.90.00
code....
Code:
mdadm --create --assume-clean --level=5 --raid-devices=4 /dev/sda2 /dev/sdb2 /dev/sdc2 /dev/sdd2
As I don't want to ruin the maybe small chance I have left to rescue my data, I would like to hear the input of this wise community.
Fedora Servers :: Catching The Spam At The Sendmail Level
Oct 16, 2009I'm running FC10, with the sendmail that was part of it in Feb 09. Anyway, Up till now I've been using the user client to do spam filtering, But I'd like to start catching the spam at the sendmail level. What are my options today? I tried searching the forums and found a bunch of threads from 2001-2006, but I figured many of the ideas are now longer vaild.
View 2 Replies View RelatedServer :: Final Destination - Raid Level 5
Jul 23, 2011I currently store my backup files onto 2 HDDs that I have in external USB enclosures, one is 1.5TB and the other is 2TB. They both basically mirror each other, but is done by manually copying files onto one and then the other. My goal is to have a Raid level 5 system and I know that level of Raid is a minimum of 3 disks so I'm wondering what my current options are with Raid level 5 in mind.
I can immediately wipe out one of the two drives I currently have with the second requiring some time to offload data from if it is not possible to proceed with Raid unless I have this second disk free. So my situation is this. Is it possible to do something right now with two disks and then convert to Raid level 5 later once I have a third disk without starting from scratch?
General :: Hard Drives Information / Can To Find RAID Level?
Apr 22, 2010I know my Linux Servers have RAID but I want to know
1. Can I find RAID level?
2. how to find Disk information...I mean if it's not possible to get RAID Can I get how many hard drives and the real size?
General :: Setting Up RAID Or Mirror Drives On The Hardware Level?
Sep 16, 2010How 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.
View 1 Replies View RelatedFedora :: Can't Switch To TTY Or Run Level 3 From Run Level 5
May 12, 2009Hi Guys,
here is my scenario:
I am running F10 x86_64 with Nvidia Quadro FX 3400.
I installed the drivers and it worked just fine. No errors generated according to Nvidia log files.
However, while in run level 5 when I try to switch to run level 3 by typing "telinit 3" or "init 3" the X server goes down and I get a blank screen. Same thing happens when I try to switch to a different tty session by <ctrl>+<alt>+F2 (or any F key for that matter).
I also noticed that when I shut down my system I can't see any more the screen where services are shutting down and their status ([OK] or [failed]).
Would appreciate your help on solving this issue.
Fedora Servers :: Installing 11 On RAID 10?
Oct 16, 2009I have a custom server built with Intel motherboard and RADI 10. The RAID controller is on the motherboard. I'm about to install fedora 11 x86 64 bit on it. Should I be experiencing any issues with anything that any of you have come across? I did a checksum check on the iso files and those were good. Also, someone sent me this link..
[URL]
However, I have a hardware RAID, not software RAID.
Fedora Servers :: Upgrade Fedora Release Keeping Raid 1 And Lvm?
Nov 13, 2010I hope this is the right section, it looks like though. I have a small nas ( via artigo a2000 ) with 2 sata hd 1tb each with raid 1 and lvm on top configured and working great.
sda1 and sdb1 ==> md0 raid1 for /boot
sda2 and sdb2 ==> md1 raid1 for swap
sda3 and sdb3 ==> md2 raid1 as physical volume then volume group and lvs on top ( / is a logial volume of these )
I wish to upgrade the current fedora 12 32bit installation I have on it doing a fresh install. But because I have a lot of data on md2 ( 600GB worth ) which I don't want to copy across somewhere else first, I need to know how ( i am pretty sure i can ) to mount md2 during the installation. This way I can use the data I already have on it.
Fedora Servers :: Raid 0 Went Into Read Only Mode
Apr 16, 2011I am using Fedora 14 64 bit with two 1T drives. There is a Raid 1 for the important information and I use a Raid 0 for cached files that can be generated on the fly. Yesterday my Raid 0 went into read only mode.
Here are a couple of tests:
What caused the Raid 0 drive from /dev/md1 to get removed? Is there a way to get it back to active sync?
I have tried:
But it can not open /dev/sda2: Device or resource busy.
Fedora Servers :: Change RAID On Fedora Startup?
Feb 2, 2009Im having a hard time trying to change my raid configuration. Here is my situation:
A have two HDs that I configured in instalation time to work as raid squid proxy-cache. they are both 40GB. 40+40=80GB. So, I want to change it to two of 160GB. 160+160=320GB.
I have:
sdc1=40GB
sdd1=40GB
im adding / want:
sda1=160GB
sdb1=160GB
I want to remove the two 40GB and use only the two 160GB for my proxy. The thing is that when I remove the two 40GB, the system crashes at startup telling me that the raid cant be done then file system check fales too. Im wondering if there is a file a have to edit to change to point it to /dev/sda1 intead of /dev/sdc1 for example, so my system would start up looking for sda1(160GB) and sdb1(160GB) intead of sdc1(40GB) and sdd1(40GB).
Fedora Servers :: Remove RAID Flag From Disc?
Apr 17, 2011I would like to mount a disc that was previously used in the Intel Software Matrix RAID array (fake-raid). If I try to mount it I get:
mount: /dev/sdd1 already mounted or tempb busy
I think my dmraid is refusing to mount it beause of some RAID "flag". I would like to get rid of it, but unfortunately I cant do that on my system (theres no such RAID):
[root@ox mnt]# dmraid -r /dev/sdd
ERROR: isw: Could not find disk /dev/sdd in the metadata
no raid disks and with names: "/dev/sdd"
There are several posts recommending to uninstall dmraid completely from the system. Isnt there smarter solution in removing such a flag?
Fedora Servers :: Setup RAID On DELL Server With F10 64Bit OS?
Jan 22, 2009I have had no problem installing Fedora OS on any of my Dell servers prior to this post. Anyway, I wouldn't call this a problem but recently, we bought another DELL server with Quad Core, 4GB, etc... AND this model has 2 swappable SAS Harddrives.
I wouldn't call myself an expert but then again I am not a newbie too. However, I have never setup any RAID before and now I am forced to setup RAID1 on this server. So, in a way, I am a newbie in setting up RAID
Would someone please point me in the right direction as I have no idea what I am supposed to do to setup the RAID. FYI, I will be installing Fedora 10 64bit on this server. I would appreciate if you can start from the very beginning, ie. partitioning, formatting the harddrives during OS installation, etc..
Fedora Servers :: RAID 6-like Setup With Dissimilar Disk Sizes?
Jun 7, 2010I'm looking to set up a bit of a home server, and am wondering about storage. What I'd like is something like RAID 6, which has good redundancy built-in, but with this being a home server, I'd prefer to start a little smaller and leave room to build it up in future. I'd been looking at commercial products like the 'drobo', which seems fairly ideal, but I'd really like to see if I can do it myself. I understand that throwing the RAID into an LVM will allow for some expansion, but the last time I checked, most RAID setups called for the same sized disks, or at least limited the array by the size of the smallest disk present.
What I'd like is the ability to build a basic framework with a few cheap disks, and then as things start filling up, to be able to add larger ones (perhaps eventually pulling out smaller ones as though they'd failed and replacing them with big ones)
Fedora Servers :: Recovering From Software RAID Failure (controller Died)
Jan 3, 2009I had a RAID1 'device' build on two physical partitions on two drives. One of the disk controllers died and software RAID did the job - now I am working on the degraded array.
Now I want to put the old disk (sdb) back, and I am not sure what will happen. Both disks have 'raid auto' partitions. And sdb file structure from before of the failure. The raid code will find inconsistency between both partitions. What will it decide? Will it start coping from the currently running system (sda) all the data to the old one (sdb) at the boot time, as I wish?
I don't want to it to write from the old one to the new one, as some months passed and lots of changes happened to the data.
Fedora X86/64bit :: Use Fedora / Linux Raid Program To Manage Raid Array?
Jun 24, 2009I've tried to install Fedora 11, both 32 and 64 on my main machine.It could not install as it stops on the first install window. I've already filed a bug but really haven't seen any feed back yet.The bug has something to do with Anaconda and the Raid array but I really can't tell.
I have an Intel Board (see signature). I am running intel raid software under W7 currently.It works fine. But, I'm wondering, when I attempt to install F!!, is my current raid set-up causing problems? Do I need to get rid of the intel raid software and use a Fedor/Linux raid program to manage the raid array??
Ubuntu Servers :: Mass Country-level Block On UFW?
Sep 14, 2010The following before.rules file will block all connections from:
Korea
China
India
Russia
[code]....
Ubuntu Servers :: Samba Permissions On Share Level
Oct 13, 2010I'm trying to set up my samba server so that all the shares are visible to everybody but that some shares can only be accessed by certain users. I have a folder Video that everybody can access without a username or password. I now want to create a share that only I can access called webserver.
This is my samba.conf
Code:
[global]
dns proxy = No
netbios name = DATABOX
guest account = nobody
restrict anonymous = no
browseable = yes
server string = server
workgroup = WORKGROUP
public = yes
security = share
[Video]
Writeable = yes
Path = /media/data/Video
Public = yes
[webserver]
Writeable = yes
Public = no
User = malteser
Path = /media/data/Webserver
Windows does not let me enter a username or password. I'm pretty sure this used to work.
Ubuntu Servers :: WebDAV - Mountable But Empty Below 2nd Subdir Level?
Jul 3, 2011I am using Safesync from Trendmicro to backup my data. Since some time I am experiencing heavy problems. Normally my Backup should look like this: But when I am mounting it with WebDAV, it is looking different:
Code:
cdrewing@christian-desktop:~$ sudo mount -t davfs http://dav.trendmicro.safesync.com /media/Safesync
[sudo] password for cdrewing:
Gib bitte den Benutzernamen f�r den Server http://dav.trendmicro.safesync.com an; wenn du keinen angeben willst, dr�cke Return.
[Code]...
Note: When I am mounting Safesync with Nautilus, everything is functional and ok. But I need my command line access because I want to use rsync. A workaround could be to access the resource via the nautilus mount. Where can I find this via the command line?
OpenSUSE :: Move Transparently Between Run Level 3 And Run Level 5 As Autologin User?
Aug 10, 2010I've been able to kludge a kill script which finds the correct pid for the kdeserver (or gnome server) after my system comes up in run level 5 so I can drop back to run level 3 mode. Lots of experimentation showed me that using telinit 3 and telinit 5 would occasionally leave the video memory in a mess and I would have the black screen of death.
I set the security parameter setting to autologin for me since I am the only user of my machine, but I still have to kludge the default setting under sysconfig (the DEFAULT_WM) under Window Manager to pick a certain window manager, so it takes time to manually switch the desktop.
Right now I can leave the gui and drop back to cli, but painful experimenting showed me that killing the X server is a no no. Right now I kill the kde server, which sends the SIGTERM to the X windows manager, which then figures out that it has to shut down.
Questions: Is there a better way of doing this? Apparently openSUSE figures that we have multiple users logging into the gui desktop, so the gui is always kept running and a login window with the desktop manager option forces the user to login in. With autologin, this never happens, but no choice of desktop is possible on the fly.
Can some type of script be set up to painlessly enable this to happen? And what is the best way of bringing either the Gnome or KDE desktop manager down gracefully? I do get lots of error messages as the system attempts to recover and X shuts down. It appears that apparently the single user with autologin is left out in the cold.
OpenSUSE Install :: Admin Level Software To User Level?
Feb 6, 2010I want to install a software called TinyOS which is an operating system designed for wireless sensor embedded networks in my account. The problem is it has instructions to install the software as an administrator since i'm not an admin of the department network i can not able to install. Is there any method to install this software as an user level rather than admin level.
View 3 Replies View RelatedUbuntu :: Adjust Level At Which Battery Criticality Level Is Triggered?
May 8, 2010How can I adjust the levels at which the battery is considered to be critically low?ight now it seems this is set at 5 or 10%. I want to make it 20 or 25%This is for Gnome. I am using Lucid x86
View 1 Replies View RelatedGeneral :: Initializing Run Level 4 At Inittab Default Level
Jan 15, 2011hello everyone, im having a problem when my computer enters in the run level 4 as the default when i start slackware. The strange thing is that it not seems that is a X window problem, it looks like more like a configuration problem in some part of the kde script to initialize the log in, because if i manually start the X service it works fine, i dont know what is the source. Thank you in advance for the help.
View 3 Replies View RelatedProgramming :: Accessing SPI From Kernel Level And User Level
Jan 6, 2009I want to know what are the advantages and disadvantages for accessing spi(serial peripheral inerface )from kernel level and user level. like methods of doing it, speed ,memeory utilization etc
View 1 Replies View RelatedUbuntu Servers :: Turn Up The Level Of Logging That DHCP Server Is Writing To SYSLOG?
Feb 14, 2011turn up the level of logging that my DHCP Server is writing to SYSLOG?I can't seem to find a syslog.conf file to edit.
View 1 Replies View RelatedOpenSUSE Network :: "iwlist S" Output - Quality / Signal Level And Noise Level Mean?
Jul 21, 2010[code]...
you can find a cutout of an output generated by "iwlist s" command for a cell. Does anybody know what Quality, Signal level and Noise level mean? What is the definition of them? I searched for it and could not find good information on it. What do these Extra:*** fields for? What does it show in the example above? How were those values computed?
[code]...
Red Hat :: Keyboard Not Working At Run Level 3 And 5, But Ok At Level 2
Jun 17, 2010Hey Guys, I'am new here and request your help on this:
After installing emacs and a few dependencies on my RHEL 5, on restarting the system, the keyboard was not able to work. I restarted several times in vein.
However, when I start in single mode, it works perfectly. I have tried looking for a solution from google, but in vein.
Kindly help...
Regards, Andrew
General :: Delete Top Level Directory And Have Contents Simply "move Up A Level"?
May 27, 2010I have a directory that has a another directory inside it. The top directory is rather redundant since it only contains the one other one. Is there a way to delete the top level directory and have the contents simply "move up a level"?
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