Red Hat :: Disable One Of The TWO Fibre Channel HBA Adapter On Redaht 5.3 Server?
Feb 10, 2011
A single LUN is attached to my server with rhel5.3. The server has two Fibre channel adapters. I need to turn off one of the FC interface manuly. Which command should i use to turnoff(disable) the adapter. The settinga are the following:
#multipath -ll
test-lun (36005076801900139b800000000000150) dm-14 IBM,2145
[size=10G][features=1 queue_if_no_path][hwhandler=0][rw]
\_ round-robin 0 [prio=100][enabled]
\_ 2:0:11:3 sdc 8:32 [active][ready]
\_ 4:0:13:3 sdi 8:128 [active][ready]
\_ round-robin 0 [prio=20][enabled]
\_ 2:0:12:3 sde 8:64 [active][ready]
\_ 4:0:12:3 sdg 8:96 [active][ready]
[Code]......
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Apr 10, 2011
My system is an Altix3000 running: (Linux sgialtix 2.4.21-sgi304r1 #1 SMP Sat Jan 29 22:43:29 PST 2005 ia64 ia64 ia64 GNU/Linux) (redhat-release=redhat-release-3AS-8.3). Which command do I use to list World Wide Name information of the QLA2300 HBA? I tried /proc/scsi and /proc/xscsi but I found nothing there.
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Jul 27, 2010
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Jul 31, 2010
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Jun 8, 2011
I've been running Debian for a while, and now have the chance to do some enterprise-level experimentation. I stumbled across a very cheap EMC Clariion CX300 fibre RAID unit on eBay with 10 disks (£90!), so I snapped it up with a fibre HBA. It's not a SAN, technically a DAS in its current configuration. I'd like to know how hard it is to set up one of these as an actual disk device in Debian.I tried installing the HBA (an Agilent Tachyon XL2 PCI-X card, 32 and 64-bit modes) in my current 'live' server (a Celeron 1.2GHz-based machine), but while Debian detected it as a FC controller card, mapping the LUNs within Navisphere on the CX to the host caused nothing (obvious) to show up in the OS. From what I've read about setting up SANs (not DASs, there seems to be precious little info on setting up these), there's firmware involved with the card, and there are no references to getting a Tachyon running under Linux.
I also snagged a good deal on a PowerEdge 1850 server, but as it's the PCI-Express version, the Tachyon won't fit, so I'm considering buying a PCI-E HBA. I found a QLogic QLE2460 for a good price, but I'm hesitant to buy it, in case I still can't get Debian to see the disks. I'd most like to have the device connected to the PowerEdge instead of the Celeron machine. Have I missed a step in the configuration, or is there anything I can do to test if the system is working as it should be? The units we use at work are much simpler: set the RAIDs up, map the host LUNs and the disk shows up in Windows. I'm also sure I've set everything up correctly on the CX, as the same LUN is available to Windows. Just need to get Debian to see something on the end of the HBA!System Specs:Live Server: Celeron 1.2GHz, 512MB RAM, Intel D815EEA2 board, SATA soft-RAID hard drives, PCI Gb Ethernet and USB2.0, Agilent Tachyon XL2 PCI-X FC HBA, Debian 6.0.1PowerEdge 1850: 2x 3.2GHz Xeons, 6GB RAM, SCSI RAID disks, PCI-E riser, planned QLogic QLE2460 PCI-E HBARAID Unit: EMC Clariion CX300, 10x 146GB FC disks, 2Gbps Fibre-channel interfaceThe PowerEdge is the planned replacement for the Celeron machine, which started life as my experimentation box and became my personal live server. Storage is holding it back, so I'd love to add a further five disks to the CX and have nearly 2TB of RAID-protected storage.
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Oct 31, 2010
We have a SuSE/SLES 9 server that boots from a fibre channel card, using volumes from a NetApp filer.
We previously had the server booting from the LUNs on the filer, but after some tinkering around with the fibre channel BIOS, we have the situation where the LUNS seem to be mounted, the OS boots, starts to initialise everything but then stalls, saying:
We have tried loads of combinations of settings in the BIOS and fibre channel BIOS without any success or any idea what may have caused the error.
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Jul 28, 2009
Can the fibre channel switch in the centOS5.3 cluster edition be switched for a regular router or hub?
If so how would one do this? If not why does the switch have to be fibre channel?
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Jan 22, 2010
I find myself in unfamiliar territory. I am attempting to get a Dell M610 (in an M100e) running Ubuntu 9.1 64bit to talk to a Dell EMC Fibre Channel Array. The Dell has an Emulex card in it and it appears that the driver is loaded OK. What I am not sure on is what to do next! I have the SAN end configured but how do I get my LUN mounted on Ubuntu ?
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Dec 8, 2010
I work for a firm of solicitors as the IT guy and I have been asked to assess the security of our network. I have recently bought an ALFA AWUS036H USB wireless adapter to help test the wireless networks. We have a few old devices that only run WEP, which I know from the start is bad. I'm trying to use the adapter with aircack. I issue the command:
[code]...
Now I set the adapter to channel 11 using airmon but running iwlist mon0 channel says the adapter is not running on any channel at all. Has anyone else experienced simular issues, and if so how was this resolved?
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Apr 30, 2010
I am running fedora 8 on a Dell 2950 with a qlogic fibre channel card.is attached to a Dell/clarion AX100.I had a drive assigned to this server which had been working for approximately a year now.Recently during a power failure things turned ugly. Rebooting didn't fix things.I unassigned/reassigned the drive, rebooted, still no good.Funny thing when I unassigned the drive and reboot the system.still see /dev/sdb but no partitions and fdisk -l does not display /dev/sdb.I even did "echo 1 > /sys/block/sdb/device/delete"
and the device no longer showed in /dev, but after a reboot it is back.I pulled and reseated the fibre card, same
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Jun 25, 2011
PC seems to run fine in single channel mode but monitor reports no input in dual channel mode and memtest86+ lists from 1-3 errors per pass in single channel mode. Motherboard (Gigabyte P43T-ES3G) can't be set for the 1.65 volts required by the RAM (2x2 of OCZ3P1333LV4GK PC3 10666). The mobo voltage choices are 1.6 or 1.7 volts. I have tried both and increased the MCH voltage from 1.1 v to 1.2 v, but so far can't get it to run in dual channel mode at all and single channel mode seems to run fine but I still get errors in memtest86+. Also tried optimized Bios settings and loosened memory timings (from 7-7-7-16 to 8-8-8-27 and tRFC 60 to 70) and reset Command Rate from 0 to 2. CPU is Core 2 Quad @ 2.4 Ghz, PSU is rated at 400 watts, Video card is Gigabyte GT220.
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Jun 29, 2011
I'm trying to crack my wep password just for kicks, but I keep running into the same error. When I try to use airplay-ng for the packet injection, it always gives me the error " wlan0 is on channel -1, but the AP uses channel 6". I've tried setting wlan0 to channel 6 manually, but that doesn't help. I spent a while searching for a solution, but it seemed like each page had a different, usually highly complex solution, that still doesn't work. I have the most recent drivers for my wireless card, and it meets all the requirements. So, is there any solution to this that will actually work?
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May 10, 2011
My Intel 5100 AGN adapter works horribly in Ubuntu. I want to disable it, so I can use a USB wireless adapter that works normally.
I cannot find a reliable way to permanently do this.
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Jul 14, 2011
Thinking about building a new system, with 4GB of DDR3 RAM. I am just wondering, which would you prefer: Dual-channel DDR3 or Quad-channel DDR3? Does one have better speed performance over another? Will one way keep your system cooler?
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Mar 20, 2010
I know that my tuner is working as i can watch tv in xawtv.
The hardware I'm working with:
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I setup the source to have "no grabber", and then set up input, when I do this, for V4L, there is no "Scan for Channels" option, when i set up input for MPEG4, there is that option, but when I click it i get an error, "Failed to open the card", but I can change the input on that page to the V4L input, i hit scan for channels, it scans and adds channels up to channel 22, where I get "No Lock"; it doesn't seem to do anything else from there.
So, how should I be using this card, and how can I know when its working with mythtv?>
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Aug 3, 2010
I am currently investigating channel bonding for rhel5.5.Is there any way I can create one bond from nics on two different linux machines.They will be a cluster without any clustering software like beowulf or LVS.There will be a cluster interconnect through which they can communicate.Should I tweak the bonding module??
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Jun 21, 2011
I just had the great pleasure of switching from standard DSL to BT infinity (fibre optics) which included switching my DSL Belkins router for a new cable BT home hub unfortunatly. My PS3 went online wirelessly fine, all our iPads/Pods/Phones went on ok wirelessly and 2 out of 3 wired Ubuntu 11.04 desktops went online ok. I also have a Macbook dual booting 11.04 but haven't tried it yet. The problem is my computer which is wired the same isn't working, I can get it to say connected sometimes and UbuntuOne did say it was updating a file but then cuts out, I just can't seem to get connected to the internet!
I didn't change anything from the previous day, just switched it on. The only significant difference I can think of between my computer and the other desktops is mine has the KDE desktop installed.
Things I've tried:
- Restart router
- Boot into different DE eg. normal, classic, KDE
- Unplug ethernet cable and plug it back in
- Restart computer
My computer is connected using the powerline system along with 1 of the other desktops so it can't be that, it must be something at my end.
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May 25, 2011
We have three Asterisk servers, one in a co-location and one at each of two offices. IAX2 trunks are set up between the three boxes.Incoming calls are answered at the colo box, then passed to whichever office box is required using a Dial command in the dialplan, eg:
Dial(IAX2/stafford/9132,60)My understanding is that the colo Asterisk box should be able to transfer the call to the office box, so that the call path changes from:
IAX Provider -> Colo -> Office
to
IAX Provider -> Office
[code]....
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Jul 28, 2010
I will install CentOS as Fileserver and XEN as Dom0 on a 4GB SD Card. The SD Cart is in a SD to IDE adapter(?). All other files (for example the Xen hosts) come on my 6TB Raid. I need only the basic system, samba an xen on the SD Card. How can i do this? Whats is the best partition table? How can i mount the Raid first on start up(for access the needet files to start Centos and services)?
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Mar 23, 2010
I just set up a FC 12 server and would like to disable the nightly YUM update. However, it appears that the following doesn't work:
# service yum stop
# chkconfig yum off
the system prompts: yum: unrecognized service
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Mar 19, 2010
Just wanted to share this with anyone wanting to know.If your headless server crashes, GRUB2 (at least on Ubuntu Server) is designed to force the GRUB menu to load up next time it starts up, which means you are locked out of SSH until someone physically makes a kernel selection on the PC.To prevent this do the following change to your grub.cfg file.#nano /boot/grub/grub.cfg
I was looking for a solution for this for a long time and found no hel with google. Let me know if there is a better way.I aware this file will get overwritten and need reediting if the Kernel gets updated.
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Feb 17, 2010
I installed a ubuntu server edition on a VMware workstation. The problem is , when I added a network adapter (so, total 2 adapters now), the second one was not being shown in ifconfig. On trying ifconfig eth1, I found that the 2nd adapter didn't have an ip address. So, I installed ubuntu desktop edition on another VM, and this time it showed both the network adapters on doing ifconfig, and both had ip addresses. Why doesn't this work with ubuntu server?
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Jan 5, 2010
I'm using Slackware 13 on my laptop, but when I remove the AC power adapter and try to boot slackware my X server doesnt start. I had the same problem with Slackware 12, but I fixed it with adding a line in xorg.conf. Something like this:
Option "PowerAdaptor...." Now I dont remember the exact line... I'm not so sure about this line in xorg.conf.
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Mar 10, 2010
I have an Ubuntu-based fileserver, which I have set up and works fine for 5 computers (Windows & Linux based). I have one computer, on Windows, which when I map as a network drive it works and I can transfer small files using the USB adapter. However, when copying over a large file, after 2 mins or so it comes up with the error "Specified network name cannot be found". However when plugged in using Ethernet, it will work fine.
What is even stranger is when I set it up as an FTP server rather than SAMBA, it will happily transfer a 4gb file on the USB adapter, which possibly knocks out driver issues (I have tried 2 different drivers, am currently using Linksys one from website - WUSB300N) AND perhaps the issue lies on the Linux server side with setting up the SAMBA server? However I do have another one of these adapters that works fine, but it is on WIN XP HOME with a custom network logon script (as HOME won't remember passwords after restart). BUT it does work on another computer with XP PRO as network place, so I tried network place on this one, and it still doesn't work.......
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Oct 14, 2009
I want to disable SSL v2 in apache on my CentOS 5.2 box (httpd 2.2.3), for that, I've added following lines in my /etc/httpd/conf.d/ssl.conf:
Code:
SSLProtocol -All +SSLv3 +TLSv1
SSLCipherSuite ALL:!aNULL:!ADH:!eNULL:!LOW:!EXP:RC4+RSA:+HIGH:+MEDIUM
and restarted httpd.
But it still not disabled, I'm connecting to SSL v2 and getting error for SSL v3:
Code:
# openssl s_client -connect localhost:443 -ssl2
CONNECTED(00000003)
# openssl s_client -connect localhost:443 -ssl3
CONNECTED(00000003)
8021:error:1408F10B:SSL routines:SSL3_GET_RECORD:wrong version number:s3_pkt.c:284:
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May 27, 2011
We have installed the Centos on server. I have enabled the ssh key authentication in that server. Now we can connect through ssh only with key file.Since this server is protected with SSH, I am unable to use the SCP command. If I use this command it says "Permission denied (publickey,keyboard-interactive).". Please let me know How Can I disable SSH Key or why SCP command is not working ?
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Mar 7, 2011
Now i want to disable my ssh server "permanently",which means it won't run unless i start it after i login.that is,it is disabled at boot time by default.
i have asked a similar question before,but i still have some confusions.
Say that now the ssh server is running.my system is ubuntu 10.04. code...
The disable|enable API is not stable and might change in the future.
the shell gives me a warning:do not match LSB Default-Start values,this API is not stable and ...
what does this mean? still it can't disable the server "permanently",ethier.
what on earth should i do to solve this?
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Jul 16, 2010
how to disable postfix logging? I can obviously set a macro to purget the logs but I am trying to reduce the IO of the logging altogether.
how to disable it?
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May 29, 2011
i made a symbolic link with this ln -s user so the user can view all the folders from ftp no just the home folder but now i see that all the ftp users can see all the folders so they can view everything not just they home folder If someone knows how to apply that just for one user, or the way to disable the link "ln -s" that ive made. I prefer to no one able to see all the folders but if you know how to ddo it for just one user will be good.
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Jan 12, 2011
Anyway, according to the release notes, RHEL 6 has a PAE enabled kernel by default. Great... But that leaves me wondering why uname report SMP. Further, I'm provisioning some systems for QA use, and they're asking that PAE is disabled. My thinking is that since RHEL 6 requires PAE capability to install, there may be no way to disable it and the googling I've done seems to support this. tl;dr Why does a default kernel with PAE enabled report SMP on RHEL 6?
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