Hardware :: RHEL4 LUN - Multipathing But Only 1 Device
Nov 22, 2010
I've got an older RHEL4 system (2.6.9-34.ELsmp) which I am needing to migrate off of one LUN and onto another. My plan was to simply have the storage team assign me a new LUN and to setup LVM mirroring then remove the origional LUN. My problem is with the new LUN. I had to reboot to get the system to even see it. It now shows up in /proc/scsi/scsi but there is only one new device in /dev and I cannot even open the sd* device.. I can only open the dm-* device.
Multipathing in linux -need to check how the luns are configuredI have no idea about luns configuration in linux environment(newbie) and now i have issue figuring out the configurationSenario,By the look of the multipath output 3 luns are connected to server1 is from Hitachi and 2 from Sunstorage(Thumper)What i am trying to achieve,I need to check how the 3 luns are configured on OS levelI need to differentiate Hitachi and thumper lun The next is to check whether 3 luns are mirrored or not (if not ,how they configured)The third and last .I need to remove the mirroring luns (if exist) and leave the system with only Hitachi lun
We're trying to take an existing system running multipathed SAN boot disks, duplicate that boot disk to another system volume, and boot a second system up with all the same parts running like the first system (think: cloning the system).However, multipathing is broke on the second system 'm sure I'm forgetting something stupid here after thecloning).Details:We have a freshly installed RHEL6 on IBM PPCThis is a boot off of a SAN volume with two paths. Installation went great - multipathing was auto-detected and used underneath the usual LVMs for the boot volumes. Looks and works great:
Code: [root@goldimage dev]# df -k Filesystem 1K-blocks Used Available Use% Mounted on
How to device-mapper multipathing in conjunction with fdisk. I am more of a solaris expert and now trying to grasp linux (red hat). I have a server that I plan to cluster (future assignment) which is attached to a Netapp SAN via emulex LPe11002 HBA. I have 8 paths to the LUN I created and I can see the multipath device (/dev/mapper/mpath1). Below is my multipath.conf file:
[Code]....
Question 1: When I look at fdisk -l, I can see all 8 paths to the same LUN. Although I partition /dev/mapper/mpath1, I can still see that 7 of the 8 still say "Disk /dev/sdX doesn't contain a valid partition table". I would think that all 8 would have this removed. I execute '/usr/sbin/lpfc/lun_scan all' and it doesn't work. I am looking to clean this up...what should I do? It seems weird to have to do it to all 8 paths!
Question 2: Why does my alias, 'db' not show up under /dev/mappers?
Question 3: Is there a way for fdisk -l to display one lun rather than displaying all 8 paths to the lun?
What is the standard procedure (commands) people execute when adding a new lun to a server with multipathing so it is nice and clean?
I'm a newbie in this forum and a newbie with administering Linux. I need to install gcc 3.4.6-10 and I've downloaded and installed the rpm, but it seems that it did not do anything.
Under RHEL4, I've mounted a drive (/dev/sdb1) under /home and it mounts with no problem a boot time since I have an entry in /etc/fstab. Using the same parameters under RHEL5, /home is a 'read only' directory. I've tried to add a 'rw' option to /etc/fstab, but /home remains a 'read only' file system.
Ive created a bootable RHEL4 USB flashdrive so that I can do my installs from rather than using CDDVD's. The USB key boots fine to the point where it asks me to select a drive that contains the ISO images, but it doesn't show me the USB drive to select, only my 2 hard drives sda1 and sdb.
We currently use HP xw9400's with the following spec as shown in dmidecode:
BIOS Information
System Information
I know that the xw9400's have the nvidia mcp55 pro chip on the motherboard that handles USB, keyboard, mouse and other peripheral traffic, so am wondering if this could be what the problem is? Like there may some code that i need to tell the machine to use this or something?
just one month before i upgraded my pc to Later configuration but then i can't install rhel4 on my pc. i have heard there is a few upgrades (Updates) will help this issue, is that true? then which update i need to use for install rhel4 successfully on my pc? or is there any third part utilities for solve this issue? here i am adding my pc's spec
AMD Athlon 2.6 Asus M2N68-AM 2 GB DDR II Nvidia 8400Graphics Samsung HDD
My X windows wasn't deployed in the installation at the beginning , but i need to install it now , my system is RHEL4 , i am not connected to the internet , so i will not be able to use up2date , so I need to use rpm instead.
I am developing a some application which running on rhel4 os. And its functions will handle via the web application. So we have provided an option to login (via vnc)to the server on web application when we need. so how we can enable vnc for a session (like 30 minit)? I'm using default vnc installation while installing rhel 4 nothing more installed by downloading. When I click session button on web page, I execute this command from my code
"service vncserver start"
then I can access server via vnc but when I click on disable button on web page, I execute this command from my code
I would like to have your opinion on the problem : I created a ghost of my server RHEL4 with RAID 1 and 5, then I wanted to reinstall it on a virtual server under vmware.
So I restore the image on a virtual disk and qand I restart I still have this problem :
I started in linux rescue mode F5 I reinstall Grub on sda
I modified the modules.conf file to change the BusLogic SCSI, but this module is not in the kernel I used kudzu to reconfigure it doesn't works...
I am using RHEL4 server in my network. I have configured VLAN in my network. i am using two gatways to access my Network. I also add two gateways to both the network. but only one gateways will work. Then I added a route for the other netowrk. but when i restart my computer my route is deleted. i used this command to add the route
I am using rhel4 with kernel 2.6.9-55 ELsmp. I have recently purchased 250gb seagate portable usb HDD. I have already mounted the usb HDD by updating Kernel with mode 755 and root user. I can transfer file from usb HDD to rhel system. But I am unable to make directory or copy file from rhel4 file system to usb HDD with ntfs. It is giving error message of permission denied though the device having write permission. I have already installed ntfsprog-2.0.0 in root. But there is no improvement. Is there any thing I can do to transfer data from linux system to ntfs.
I am trying to setup Postfix along with dovecot on RHEL4. I have done the necessary settings in dovecot.conf, yet I am not able to log into the POP3 server. The error I can see through WireShark/Ethereal is "Err- Authentication failed" Some of the important settings in /etc/dovecot.conf are
I've searched everywhere I could think of and have been on google for about 4 hours today searching with no luck.Is there anyone out there who can confirm a working PCIe sound card on RHEL4.4 (Linux kernel 2.6.9-42)?The only cards I've found that work on Linux are the Asus Xonar cards and the PCIe version of the Sound Blaster Titanium but they are confirmed for later versions of Linux but I can't modify the alsa drivers or update the version of RHEL.
How I am configure DNS Client and server in Redhat Linux 4 in my lab.I have total 5 computers and they are Lan connected.I want to make one of them server and the others are client.
I want to install the wireless lan driver in rhel4. I searched for the driver in internet, i got only Realtek rtl8185_linux_26.1031.1207.2009.release.tar.gz, how to install it in RHEL4.
I am working on RHEL4 AS. I have created a user and tried to access, but the system is showing the error messsage as "system administrator has disabled access to the system temporarily". I could login through root. Before this I have changed the root/.gnome2/panel2.d folder permissions for group and others as read only to prevent other users to delete or add icons on the panel bar.
i am configuring a web server with multiple virtual host on RHEL4 AS but i m getting no error except the following one.but when i browse the web site it does not work even
Starting httpd: [Sun Jun 13 05:53:57 2010] [warn] NameVirtualHost *:80 has no VirtualHosts
my httpd.conf file is as follow
Use name-based virtual hosting. # NameVirtualHost *:80 # # NOTE: NameVirtualHost cannot be used without a port specifier
I've been trying to track this kernel panic down for the last few days on this system... I believe it might be autofs/nfs related, but I'm not 100% sure.
i am facing problem in installing oracle 10g R2 on rhel4 x86. following error is throwing while installation:-java.io.FileNotFoundException: /tmp/OraInstall2010-02-19_10-21-06AM/oui/instImages/images.properties (No such file or directory)
