Server :: Device Won't Mount During Boot - CentOS 5.4 On Amazon EC2 Instance?
Feb 16, 2011
I'm having a consistent problem with instances on Amazon EC2, which a lot of searching including here has resulted in no solution.During boot I see the following message on the console (or "System Log" in the Amazon console):Code:Mounting local filesystems: mount: /dev/sdg already mounted or /apps busy(I'll append a extract from the full log below).Once I log into the instance, I can access the filesystem so it's mounted somehow but I can't figure out what's going on:
Code:
# df -k /apps
Filesystem 1K-blocks Used Available Use% Mounted on
I just finished setting up a default Linux EC2 instance and would like to install PHPMyAdmin. I already have Apache and MySQL installed but cannot seem to install PHPMyAdmin. I tried using
sudo apt-get phpmyadmin but the command apt-get is not recognized.
I also tried sudo yum install phpmyadmin but that I get the message No package phpmyadmin available.
I'm looking to set up a clustered mail server, I kind-of know how I'm going to do it but wanted to check if there was a better way. So we have 3 mail servers, running as EC2 instances on Amazon AWS. We were going to achieve clustering by giving all three a shared EBS storage device to store the mail. The mail would be received by any of the three servers (Via postfix) and could be retrieved from any of the three servers (via dovecot). For receiving mail (SMTP), the domains would have 3 MX records pointing to each of the servers but for sending and retrieving mail (SMTP and POP3/IMAP) the three servers would have one DNS A record with 3 IPs associated (I know when using this method for web-servers, the load gets distributed among the IPs under that record but I'm not sure if this will work for SMTP/POP3/IMAP).
What we want is to have 3 servers that share the load equaly but are completely redundant for all services (POP3, IMAP and SMTP). We also need to be able to scale upwards so if we need to add more servers we can do easily. Also the servers must be perfectly synchronized at all times.
I virtualized a PC with VMware vCenter Converter. But when I boot my virtual PC, I have an error.I found this link but I can't mount /dev, /sys and /proc. I have this error message : mount: /dev is not a block device.
I want to keet some data on windows dir. I have tried the below command and giving the below error. [root@xyz0044 ~]# mount -t cifs //10.48.64.52/jata -o username=domainv.kumar3,password=xxxx /mnt/backup mount: block device //10.48.64.52/jata is write-protected, mounting read-only mount: cannot mount block device //10.48.64.52/jata read-only
In a nutshell, our RAID 1 array was rendered broken and we were advised that core lib files were missing and the OS needed to be reloaded... a quote from our server host:"The OS is not healthy.This server will need a reinstall. Libs are missing." This was after having replaced what we though was a faulty /dev/sdb. So they reloaded the OS (Debian 5.0.2 x86_64) on 2 FRESH drives, and installed the old /dev/sda as /dev/sdc once the reload was completed. Here's the output of /etc/fstab on the fresh install so we know what we're working with:
The one problem I see myself running into is /dev/md1 and /dev/md2 are currently in use by the new system, so I cannot mount it there. I should also note, reloading the OS is a viable option if needed as we haven't started configuring the server yet. So if we need to reinstall the OS and assign the NEW RAID arrays to something other than /dev/md1 and /dev/md2 then we can do that.
Reboot and select proper boot device or insert boot media in selected boot device and press a key. I got this error after: Reducing my Windows 7 partition by about 100gb. Creating a new partition (100gb) and copying my Ubuntu partition (10gb) to the new partition. After it was copied, and pasted, the original partition was deleted. I now had two partitions a new 100gb Ubuntu partition and a 600gb (or so) Windows 7 partition.
All of this was done using a bootable USB with Ubuntu 10.10 and GParted partition editor. Now when I boot I get the "Reboot and select proper boot device or insert boot media in selected boot device and press a key." error.
I have KDE 4.4 and Firefox 3.6. Whenever I click a link from a plasmoid widget, it tries to open Konqueror and another instance of Firefox. The page actually loads in the opened Firefox window, but the task bar shows an instance of Konqueror and another instance of Firefox, that keeps loading for a while then close. See image below:
I currently have setup the browser default application as "firefox". If I set this option to use the default application, it opens in Konqueror and I don't see additional windows in the task bar. If I change the option to "firefox %u", then it exhibit the same issue, but the process is much faster, so the loading windows don't stay for long in the task bar. Additionally, it opens the link on a new Firefox window and opens the page twice. Although Konqueror is not loaded, the bouncing icon next to the mouse pointer shows up and stay for a while.
I've got Fedora 14 running on an EBS volume on Amazon EC2. I've created a few users and enabled port 22. When I set a password for these users, they can successfully ssh into the instance; even if they logout and login again....until:
If I reboot the machine, they can no longer ssh into the machine (permission denied). If I issue the passwd <user> command and change their passwords, they can login again....until I reboot the machine at which time they cannot login again until I change their passwords. The problem exists even from the machine. That is, if root attempts to ssh into 127.0.0.1 using their username/password, the same problem/resolution exists.
I am interested in signing up to the Amazon EC2 service with EBS. I have never used a unmanaged vps before, but I know how to use the command line etc. There are some basic packs on there to use, with basic LAMP stacks. But I would like to ask about how do I:
Upgrade a lamp stack? - someone mentioned yum, but what is this? how easy is it to use? is it enough? secure the lamp stack? - assuming I have no idea of linux security, can you give me a list or something of things I need to consider so I can begin the search (or just cover the steps would be awesome!) My website just uses php and mysql, so thats all i'll need. If you have any other tips on this,
why I'd be receiving this error. I have created a partition and filesystem and put the label in fstab. Everytime I reboot the server it is unable to mount the filesystem. However I am able to mount it manually.
We have our web site hosted by Go daddy and they provide us with the mail service as well. But there are a lot of constraints with the mail service with regards to the number of mail boxes, size per box, relays per user and so on.To avoid this, we are looking at other options. One is to have our own mail server but it will require a lot of infrastructure and expertise. But Amazon web services looks nice. They have infrastructure needed and all. One thing on my mind is the reverse look up of the mail servers. They wont be associated with the domain as both would be on different hostings. I am open to both windows exchange server as well as Linux server. Has anyone done this before or has any idea about it? I have gone through some of the threads in their forum and there are a lot of mixed views about it.And main concern everyone views is the reverse lookup. This could lead to all the mails sent from my server tagged as spam at the recipient end.I could not make out in which forum to write and hence in newbie. If this is enough about networking or server please move it.
Summary of issue: EXT4 filesystem won't mount--with error = mount: unknown filesystem type 'ext4'. Is no ext4 in kernel the issue? Or is something corrupted?Really perplexed by this. I updated Centos 5.5 to 5.6 to get ext4 (5.6 is supposed to have full support of ext4). I built several arrays and put the ext4 filesystem on them. All went well until I tried to mount them. BTW, this array (below) is set up as a RAID6 using partition 1 of #8 2TB drives.Bear with me here; just trying to be complete and not waste your time.
Attempting to mount give this:[root]# mount -v /dev/md1 /asc/array1mount: unknown filesystem type 'ext4'Note: it does "fake" mount with ption (which apparently does everything except the system call):[root]# mount -f -v /dev/md1/dev/md1 on /asc/array1 type ext4 (rw,grpquota,usrquote)e2fsprogs:Package e2fsprogs-1.39-23.el5_5.1.x86_64 already installed and latest version (for Centos 5.6; CentOS 6x uses the 1.41...)
i have 5.4 installed on a super-micro server motherboard (has two gigabit ether ports). when i boot while its initializing everything it gets to the "starting eth0" and just stays there?
right before it boots up and says press any key for options i press a key and choose "centos (2.6.18-164.el5)" and it boots up fine but when i choose "centos (2,6,18-164.el5xen)" the problem occurs. and that is the default boot option.
Last night my old Sony Vaio laptop which connects via wired Ethernet and runs Ubuntu 10.10 started hammering the network out onto the Internet. Fired up Wireshark and found lots of traffic between my machine and 174.129.193.12 which I did a whois on and found belonged to Amazon EC2 Cloud Server. The port on my machine was an unknown 5000+ but the port on the remote system was 443 the port used by https, however no browser was running. Did a search and put together a couple of iptable commands to block this IP address which stopped the traffic. I then used nmap and netstat and found port 3000 open and another connection to IP address 91.189.89.76 which I also blocked. Unusually no info exists on this IP when you do a whois. At first I thought it might be some sort of sync as this machine has Ubuntu One running on it, however it could also be something else.
what now trying to mount partition get this error this is the partition ubuntu 9.10 is installed on and upon reboot error no device with a long string. mount: can't find /dev/sda6/mnt in /etc/fstab or /etc/mtab
so now that I believe I've successfully mounted the partition how do I direct the bootloader to this partition /dev/sda6 on /media/11076e45-e27d-470b-bb6d-6894f7809a0c type ext4 (rw,nosuid,nodev,uhelper=devkit)
I installed CentOS 5.3 without major problems, and customized the installation to my heart's content, but I still do not have flash plugin active when I first open firefox. I have to close the first firefox window and from the second instance of firefox, the flash plugin works without any problem.
I face a problem with my server after i rebooted it i got a message on start up tell me that " Unable to access resume device (label=swap-sdb3) " and the system doesn't startup
the error message exactly is
Unable to access resume device (lable=swap-sdb3) Creating root device. Mounting root filesystem. [ 3.305354] EXT-fs (md1) : error : unable to read superplock mount: error mounting /dev/root on sysroot as ext3 : invalid argument
The server comes up after rebooting and after setting the hostname it starts setting up logical volume management. It says that 2 logical volume(s) in volume group "VolGroupOO" now active But then it starts to check the file system and errors with fsck.ext3: Device or resource busy while trying to open /dev/sdb1 [failed]
***An error occured during the file system check ***Droppping you to a shell, the system will reboot when you leave the shell Give root password for maintenace
After I log in with the root I get the message mesg: error tty device is not owned by group 'tty' Can the forum tell me how to troubleshoot this issue so I can boot back up again? I have 2 harddrives in this server and only 1 drive was detected when I first installed CentOS. The error first appeared when I mounted the 2nd drive at the mount point /UserGeneratedData. drive was formatted with ext3 before mounting and did not have any data on it I don't want any software RAID if thats what seems to be going on with "VolGroup00"
I have two CentOS 5.4. One is real/host and the other one in VMware-Server.
IP of host is 192.168.200.0/24 and IP of guest is 192.168.210.0/24
I can use ftp,samba,http .. between them but can't mount nfs in the guest and vice-versa since, they are in different network. showmount -e , shows the nfs shared list
I had a centos Linux 64bit installed on my server. Unfortunately I don't know how but my OS crashed and now I have no way to get back my DATA except for rescue disk. I have a Linux 64bit loaded in my server with rescue but I have tried many ways to mount my hdd in Linux and was not succeed.
I'm trying to create a Linux instance on a Windows 7 PC and use dual-boot. I have created 64GB of space for Linux. Is this enough? When I boot from the live DVD and go through the setup, I get stuck setting up the unassigned space as a linux partition. I don't understand what the setup is trying to tell me and I'm afraid I'll wipe out Windows 7. The message I get says there isn't enough space even though the unassigned available area is 64GB. I am very timid about following what Yast2 is telling me because to my untrained eye it appears the setup wants to use my entire hard drive. Where can I find more information about the disk setup section of the installation process?
dmesg | grep -i time ACPI: PM-Timer IO Port: 0x408 Calibrating delay using timer specific routine.. 4658.19 BogoMIPS (lpj=2329098) Using local APIC timer interrupts.
I dont know if this is possible or not but here what I would like to do. I have 6 linux server and each has 100GB disk space. All of these 6 box are compute nodes and space are not used really. However, If I can combine 6 servershard disk that will in total 6*100GB gives you quite a bigger space. Is there any tool or ways to mount these drive in one volume instead of mounting individually ?
We are running our website on a VPS Centos 5.6 box, and I am trying to set it up as an NFS client to a remote NAS server box. The script (remote_mount) I'm using (copied inline below) works fine when I run it on another Linux server box running Slackware, but when I run the same script on the Centos box I get the following error message. code...
