CentOS 5 Hardware :: Dev/md0 No Valide Partion Table?
Apr 7, 2010
i did make a raid server out of some old hardware and 2 new sata disks.setup is: 15 Gb ide harddisk as hda,a pci serial ata controller, with two equal sata harddisk on it (320 Gb each)did a minimal install of centos 5.3 on this (with a yum update after install).i choose for a raid1 configuration of the serial disks.on the command line fdisk -l gives:hda1 hda2, hda3 (swap), hda4 (extended) and hda5 (logical, data partition).added to thatdev/sda1 linux raid autodetect (the first sata disk)dev/sdb1 linux raid autodetect (the second sata disk).both sata disks only have one folder /raiddiskthe last line of the fdisk -l output gives:/dev/md0the size is as each of the sata's is (320 Gb), the listed heads etc. are not equal to those of sda1 and sdb1 (which are fully equal to each other).
as the utmost 'last line' of the fdisk -l output there is a line stating:"disk /dev/md0 does not contain a valid partition table"when i output the fdisk -l command to a text file (fdisk -l > whattheheck.txt) that last line is not in the text file, so centos seems to print it additionally to what fdisk -l brings up.my concern: what does that last line about md0 mean, and how risky is it to ignore it?(writing to the sata disks seems to be okay, both seem to have the same data on them)
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Aug 19, 2011
We purchased a virtual server from GoDaddy (1 month trial) to set up as a proxy for our networks (24 of them). I am having 2 separate issues. The first is I can't configure/install NAT and support is telling me the only way I can is to purchase a dedicated server. Here's the error:
iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-port 3128 iptables v1.3.5: can't initialize iptables table `nat': Table does not exist (do you need to insmod?) Perhaps iptables or your kernel needs to be upgraded. Here's the fix: [URL] So, what I am hoping to do is configure this by just opening port 3128 directly, and only allowing access from our networks. As a test I did this and allowed only from our office and it did not work. However I can't connect, so I am wondering what I am doing wrong? Here's my squid configuration:
[Code]....
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Dec 19, 2010
On my old centos 5.2 installation, yesterday my system stopped. The only daemon working was the ping. Every other were not working ( http, svnserver, vncserver, ssh ... ) but yesterday morning everything worked fine! Since the system is headless, I rebooted the computer this morning. Then it never came back. I placed a screen on the computer and when the computer boots, I can see : loading grub stage 2 then I have a black screen with grub>
There is something wrong ... I'm sad because I moved in my new house and did not took the time to restart my backups ( in fact, I did not found the AC adapter for the external drive ) ... I downloaded the brand new centos 5.5 installation DVD and when I try to upgrade my system the installer tells me that the partition on 1 hd is not readable. Then I ignore the message but before getting to the partition manager, it tells me that the partition table for the lvm 00 ( /home ) can not be found and I have to reboot. Since this hard disk is the biggest ( 1tb ) and all of my data is on this one, I'd like to know what I can do to recover this data ?
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May 7, 2009
You piece of advice will be very useful for me! How to execute "ALTER TABLE" for a lot of tables in database? I'm going to change engine from MyISAM to NDBCLUSTER. There are several hundreds of tables in database.Command like ALTER TABLE * ENGINE=NDBCLUSTER
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Mar 26, 2010
# iptables -t tproxy -n -L iptables v1.3.5: can't initialize iptables table `tproxy': Table does not exist (do you need to insmod?) Perhaps iptables or your kernel needs to be upgraded. Does exist a tproxy module for CentOS's kernel (2.6.18) ?
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Dec 21, 2010
I have an external USB drive, with GPT partition label. The drive is cut up into two ~1.5TB partitions When I plug this into my CentOS 5.5 box, the drive is not detected. Instead, dmesg gives me this:
usb-storage: device found at 7
usb-storage: waiting for device to settle before scanning
Vendor: Seagate Model: FA GoFlex Desk Rev: 0155
Type: Direct-Access ANSI SCSI revision: 04
SCSI device sdh: 732566645 4096-byte hdwr sectors (3000593 MB)
sdh: Write Protect is off
[Code]...
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Oct 23, 2010
i need to prepare a presentation for that i have to copy a table from [URL] to my power point slide. but when i am copying it i am just getting a table with single column. is there a method to import the contents from web page table to my presentation table?
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Feb 11, 2010
New Centos 5.4 64bit install on vmware esx 4, NAT net setup. I can ping/trace other servers on IP, do nslookup's on name..Ping(traceroute on name gets me "distination unreachable", indicating an ICMP issue, so I checked the network setup, all looks like usual.Well, except that my routing table lacks the 127.0.0.0 and 0.0.0.0 def. gw entries, as in this working box example:
192.168.9.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
0.0.0.0 192.168.9.1 0.0.0.0 UG 0 0 0 eth0
FWIW, during install, I did the usual basic firewall steps,including SSH.Tried with/without iptables, no change; no wonder given the lacky routing table. Sure, I can add what's missing to the routing table, but I'd like to know why it's missing; i.e. what I missed on basic setup, as I'm going to repeat this with a nof new installations (replacing SLES).
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May 27, 2010
I just installed a MySQL server but for unknown reason im not able to set a root password.
CentOS 5.4 - 2.6.18-164.9.1.el5PAE
MySQL Ver 14.12 Distrib 5.0.77, for redhat-linux-gnu (i686) using readline 5.1
# yum install -y mysql mysql-server php-mysql
# service mysqld start
# mysql -u root
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)
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Oct 27, 2010
when I try to send emails to new created emails account, I get this error:
<teste@topdapop.com>: Recipient address rejected: User unknown in virtual mailbox table�
And if I try to send a e-mail, the authentication fails if I setup the account at the desktop email client to password requirement on.
But it works when I try it using a webmail client (Horde) and I receive the email.The old emails accounts work fine. The new accounts and old ones were created with Plesk.I find an entry with
/usr/local/psa/admin/sbin/mail_auth_view | grep teste@topdapop.com
I get no output from
strings /var/spool/postfix/plesk/virtual.db | grep teste@topdapop.com
Using mchk and mailmng does not seems to change that.
I also found the file /etc/postfix/virtual.db .strings /etc/postfix/virtual.db : no output
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May 3, 2010
Kmail 1.13.2 Problem on startup, error is from nepomuk, data storage. "cannot find Redland backend, nepomuk is disabled until fixed. Also see the following error from the akonadi console:
100503 10:00:15 [Note] Plugin 'ndbcluster' is disabled.
100503 10:00:15 InnoDB: Started; log sequence number 0 31413862
100503 10:00:15 [Warning] Can't open and lock time zone table: Table
'mysql.time_zone_leap_second' doesn't exist trying to live without
[code]....
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Feb 25, 2011
what is the translation table and referance table in any DB (with referance to Data conversion)
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Aug 6, 2010
Is there a difference between using GPT partition table when formating hard drives and MS-DOS partition table? What are the advantages/disadvantages of using either?
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Jan 26, 2010
I wanted to add a new new partion on my debian system and have a problem..I went into cfdisk and made a new 10GB partion wich got the name hda6 after writing to the disk, but when i look in /dev/ to format it " mkfs.ext3 /dev/hda6" it is not there. only hda1-5. why is this ?
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Jan 29, 2011
I tried to create a new extended partion on my /dev/sda3 which was actually in use. The creation went well, but when I rebooted I got a kernel panic error. I tried to access the previous partition with knoppix live cd but I got an error telling me the mount failed. I'm using a centOS 5.5.Please do anyone know what to do in such case in order to recover the data?Any help will be wellcome because all my project I just completed is there.
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Jan 7, 2010
So on Ubuntu, How do I change the size of the drive partition that Ubuntu is on? OR how do I seperate Ubuntu OS from everything else? My partition size is 10 gigs, hard drive is 160 gigs, so how do I save all my music, videos and pics to my free space? By default everything goes to my 10gigger and now Im obviously out of space.
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Apr 25, 2009
if pendrive is connected ,how the RHEL displays the pendrive as a separate drive in GUI.How it is getting information or communication from the particular USB driver module???it will register for any event or any signal will send by the driver module to GUI.please send those details
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Mar 1, 2009
I have Celeron 2800D, 512 RAM (2 slots 256 each). I'm trying to install CentOS 5.2, it asks me about installation type (I tried graphic and text already, it stuck anyway), then after I press enter it shows me "Mount-cache hash table entries: 512" and that's all. I waited severl mins, it doesn't move. I tried to reboot pc several times, it's same. Then I removed 256 and left only 1 slot. and it's fine! I installed centos successfuly. Then I inserted second memory and centos does't load. I see some colored (each time new color) text that changes very fast and then black screen. I connected other HDD with WinXP, it runs fine, it shows me 512 mb, I can lunch Visual studio 2005 fine, etc. But centos just stuck each time if I have memory in both slots.
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Jan 18, 2010
Currently i have a dual boot on my laptop of fedora and vista. Is there a way that i can use virtualbox to open my windows partion while using fedora? I understand that virtual box makes a "partition" on my fedora partion and runs of that. It would be pretty awesome if i could open my windows partion while using fedora.
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Jan 19, 2010
OK so i burn a copy of 9.10 to a CD and started up the live desktop, when i got in i started up gpart. i desisted to give 40 GB to ubuntu i put in the numbers and came out with a 39.04 GB empty partion, so i toyed with it to try to get to 40 on the nose. this is the point where i should have walked away while i was ahead but i did't, i kept toying with it till i was almost there, but when i finally got it i realized i still had to finalized the changes so i hit the green check mark and let it run after 10 min's of gpart was reading my entire 180 gb partion which i had windows on. i grew in partion, and i remembered it was much quicker in the past when i partioned from inside the install so foolishly not knowing what i was doing i hit cancel. then my heart stopped when i saw the word unknown where it used to say ntfs. i relised i just destroy my windows install. i started to panic, because my backup of all my files where on another computer and guess what 3 days ago the hard drive died on it and i never got a chance to back up the stuff from this one to somewhere else. then i relised i had a 10 gb factory installed backup partion. so i restarted the machine and got nothing operating system not detected, and when i trying to got to the started up menu i didn't have the option to boot in recovery mode which i was expecting. but i had one last saving grace i upgraded from vista to 7 for free and still have the install disk, so i started up the install disc and selected recovery mode after trying automatic recovery and falling i tried restore from system image, it couldn't find the partion, as a last ditch effort i tryed system restore and as expected failed
i am at my wits end and have no idea what to do next short of wipe the drive and do a clean install, which i relay don't want to do because I'll lose all my data.
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May 22, 2010
I have a laptop with 2 partitions . The second partition is called 'Data' and is for storing files. Every time I want to access it, I have to enter the root password. This is not a big deal but its tiresome when trying to run a program like Picasa. The folders where the pictures are located are in the data partition and if I forget to mount the partition, then the folders are not accessed under Picasa.How can I avoid entering the password every time. The data partition would be better opened automatically when the laptop boots up
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Jun 10, 2010
How can I change NTFS partition size from Linux (not installing any software under Windows)? Is there any software, which can help me on this? It's desirable that this was some Gnome package.
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Sep 3, 2010
How do I completely delete the Windows partion using GParted in Ubuntu? I heard that the boot option for Windows still shows even after deleting the partition using GParted
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Sep 29, 2010
I am using dual booting windows and redhat linux and i want to some datas from windows to linux
how to mount windows partion in linux
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Apr 2, 2010
Mine is dual bootable system i686 (Visa and RHEL 5). I have important data on VISA which is NTFS. I would like to access the NTFS drives from Linux RHEL 5.
I have downloaded and installed the fuse-2.7.3-1.el5.rf.i386 and fuse-ntfs-3g-1.2301-1.el5.rf.i386 rpms from dag.wieers.com but when i run the mount command which is mount -t ntfs-3g /dev/hda5 /mnt/wing it is showing the error message ----------------------------------------- FATAL: module fuse not found...
I have to use RHEL 5 only.
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Jul 30, 2009
It mounts sometimes, sometimes it doesn't ! what could be the problem ? i have tried mounting it manually but no success.
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Aug 18, 2010
I run fedora 13 on my laptop (dual boot with Windows 7) and I just created a new partion to hold sensible data, encrypted with LUKS. I followed this tutorial for creating it.Now, everything went well and the new partition works well. But I needed something a little different from what the tutorial suggested, because I don't want the partition to be mounted on the system each time it boots, but I would (unlock and) mount it manually when I need it.
To do so I just didn't follow the Tutorial steps from 7 to 13, thinking that without the changes to crypttab and fstab the partition wouldn't be even touched by the start up process. And that's partially true: the partition isn't mapped nor mounted in the system when I boot, but the problem is that it however keeps asking for the passphrase to unlock it even if it doesn't get mounted or mapped.It just asks for it before the system loads all it's parts (udev, filesystems, etc) and I can't understand why, what it uses it for if it doesn't unlock it.So my question is: why does it ask for the passphrase to unlock luks if I haven't set crypttab and fstab to mount the partition on start up?
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Nov 10, 2010
I searched on googlehere on forum, but no one answer, how can I write on ext4 partitions?As root I can write!!Here some informations:
cat /etc/fstab
/dev/disk/by-id/ata-WDC_WD2500BEVT-75ZCT2_WD-WX20A5959889-part6 swap swap defaults 0 0
[code]....
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Apr 9, 2010
I have been missing disc space in my / partion. Was 20Go.I deleted a unsed partition and then increase my / partition to 133 Go.Did this in yast and can see that the partition has this size. But when I restart my suse, the size of the partition remains to 20Go.
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Jun 13, 2010
I just dropped my laptop while it was on. It is a dual boot vista and Ubuntu machine (9.04) and Ubuntu was running at the time. The machine didn't go down and after I got done using it I shut it down normally. Now it will not come back up because grub is saying there is something wrong with the disk geometry. It did give me a command line, I forgot the exact error message but I can look it up if needed.
I tried plugging the hard drive into a different machine under a live cd but everything was in the lost and found folder (80 GB) and the folder was unreadable. I backed up the windows partition successfully using windows explorer and now have been looking at testdisk and Stellar Phoenix Linux Data Recovery ($80) for the Linux partition. I don't know if it is ext3 or ext4, I may have bumped it up to ext4 from the default ext3 during the install. Also a few files on the windows partition were unreadable, so the disk definitely has some physical damage. I'm getting a new one along with a back up system for sure after all this is over.
I got tired of figuring out testdisk so I let the paid app run its free test overnight to see if I could recovery anything before I bought it, but it got hung up on a sector halfway through.
Going forward I think I will try Photorec next and then testdisk again if that doesn't work. Does Photorec get almost all the normal office (doc xls), music (mp3) and video files (mp4) not just pictures?
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