CentOS 5 Hardware :: Added HDD Does Not Show More Space Overall
Oct 10, 2009
I have a CentOS V5.3 system with a single 30GB HDD having about 21 GB of free space. I added a 40 GB HDD with a single ext3 partition. After reboot, the free space still reads as 21 GB. I ran the LVM GUI, and added the volume to the LVM group 00; no change to the free space after reboot. I ran the LVM again, removed the volume from the group and created a new group for the volume; still no change after reboot. I am clearly missing a key operation.
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Apr 15, 2010
I found what I believe to be odd behavior on an OpenSuSE 11.0 computer today. I needed to add some disk space on one of our computers and here is what I did: This computer had a separate disk for swap space so I deactivated swap (swapoff -a) and then removed the swap entry from /etc/fstab. I then shut down the computer and replaced what was a single disk used only for swap with a RAID1 hardware mirror.
I then booted the system and added a swap partition and another file system on the new RAID1 volume. Even after activating the new swap space with swap on, no swap ever seems to be actually allocated. The swap space shows up in top, free, "swap -s" and vmstat, but never gets used. I realize that a reboot will result in the swap being used, but is there anyway to get the kernel to use the swap without a reboot.
It's probably worth noting that I verified this behavior on a second computer. That is I turned off swap, removed the swap entry in /etc/fstab and then rebooted. Swap is never actually allocated until a second reboot. By the way, this was discovered when some of our users attempted to run java on the system where I did the first work and they got:
prompt> java -version
Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine.
Yesterday, java was working fine and I got the same results on my test computer. Is this a kernel bug or just odd behavior?
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Mar 3, 2009
I seem to be having an issue with iptables, every so often the server starts loosing packets and then goes off completley, if I manage to login to ssh I can stop iptables and this resolves the problem, however it keeps doing this. Is it possible to stop anything being added to iptables?
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Feb 24, 2010
I can't find out why that are invisible files using /var/log space
Code:
# du -hs .
5,3G .
[code]...
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Jul 29, 2010
Samba 3.5 Centos 5.5
I am trying to attempt to set up a samba ldap PDC server.
When I try and connect a computer to the network I get error 'Username could not be found'
I have included smbldap.conf ##smbldap.conf
slapd.conf ##slapd.conf
the smb.conf ##smb.conf
the results of slapcat ##slapcat
the eriror log for log.roor ##log.root
The error I marked as interesting ##interesting , shows that it can't create the user or maybe something else. But up until that time there didn't seem to be a problem.
##smbldap.conf
SID="S-1-5-21-2244683438-1300233924-2635510394"
sambaDomain="internaltest"
slaveLDAP="127.0.0.1"
slavePort="389"
[Code]......
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Apr 27, 2010
I have a issue that could get me fired, so I would appreciate your input. My knowledge about linux is limited
The company I work for has a Dell Poweredge 6850 that keeps pretty much everything (databases, websites, etc). The server had a Virtual Drive created from 2 Physical Drives. Since the HDD space was getting low, we got a new drive, inserted it, formatted and rebooted the system. But the system now refuses to start, giving an FAILED message, something related to EXT2 partition that cannot be read at /dev/hda1
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Oct 21, 2010
I'm using rsync to create a mirror of the data files on our main server every day. I've looked at the man page, and can't see it; can I get a listing of the files that have been changed on or added to the mirror when it's completed? Can it just log what it's doing to a file?
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Jul 9, 2009
I have a Dell precision 380 (system specs can be found here: [URL]. My system is set-up in dual boot configuration with Windows Xp x64 on one side of my HD and CentOS 5.3 (64bit) on the other. My system came with 2Gb (2 x 1Gb) of RAM and I recently wanted to upgrade. I bought 2 x 2Gb ELIXER DDR2 667Mhz RAM. I carefully added the new sticks to my motherboard, booted up windows via bios which noticed the new RAM was present. All seemed well.
However, on rebooting the system and entering the CentOS boot phase, after the boot phase (eg starting program... [ok] etc) but before the login screen my screen goes black / blank. My system has an ATI FireGL v3100 graphics card, I checked out the technical info on this and it should be ok on 64 bit linux. (See: [URL])
[Code]....
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May 30, 2010
After moving to Lucid Lynx, I've noticed, that when I view Folder Preferences, Nautilus no longer displays the free space available, but instead displays "Free space: Unknown".
In some cases it still appears to show the free space, for example when viewing properties of Home folder, or viewing the properties of a detachable HDD in media-folder (but not when trying to view the properties of any of the folders _on_ that HDD).
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Sep 27, 2010
Code...
but 'top' shows 2GB of swap...
top - 18:38:42 up 4:22, 5 users, load average: 0.54, 0.61, 0.64
Tasks: 369 total, 1 running, 368 sleeping, 0 stopped, 0 zombie
Cpu(s): 7.4%us, 1.4%sy, 0.0%ni, 86.9%id, 3.4%wa, 0.0%hi, 0.9%si, 0.0%st
Mem: 33265832k total, 24859468k used, 8406364k free, 379892k buffers
Swap: 2031608k total, 0k used, 2031608k free, 2030328k cached
Why is that?
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Nov 5, 2009
I've got an install of CentOS 5.3 in a VM which was installed without X or Gnome.I've added X (yum groupinstall 'X Window System') and Gnome (yum groupinstall 'GNOME Desktop Environment) and can now run startx no problem.However on boot I get a command line login rather than the graphical login screen one normally gets if Gnome is included at install time.What do I need to do to get the graphical login after boot?
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Feb 23, 2011
This weekend, I installed Debian Squeeze on my server. I've formatted all the hard disks to EXT4, and I'm using kernel version 2.6.32-686-bigmem.When I tried to install the program saidar, it surprised me why it does not show my hard drives under 'mountpoint' [URL] <-- Saidar screenshot) as I could when I ran with Debian Lenny with the same kernel, but where the hard drives were formatted in EXT3. My laptop which has Ubuntu 10.04 as OS and the hard drive is formatted in EXT4 can easily show the hard drive in saidar.
I also tried to install PHP SysInfo on the Debian computer, but it does not bother to show anything on the hard disks
I tried to check fstab file and I can see that Debian uses UUID to identify the hard drives, but I've tried to change it to something with /dev/sdx, but it did not help either.[URL] (fstab file)
I know that Debian squeeze is very new, but it would be nice if someone could give me a hint what might be wrong, because I am a little tired of all time to use 'du-hs' command To find out how much space is spent on the various drives, since the command is a little slow, since hard disks are well filled.
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Mar 6, 2010
find out the total amount of free unused partition space in a hard drive?
reason:
-- when i use fdisk to create a new partition; its hard to tell how much free space is available.
-- tried searching the net but found no answers. some suggested using cfdisk.
-- i don't have cfdisk installed on the centos 5.3 server. i don't think its bundled in the distro any more.
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Feb 18, 2010
I am trying to install CentOS 5.2, and the installation ran out of disk space after running for about 2 hours.I checked the FAQ, and it said 1.2 GB. The disk is 3 GB. The default install was selected, and I think that it checks for sufficient available disk space before installing. Still, it ran for quite a while before announcing that it was out of disk space.The Installation Guide is not very helpful, since there is a blank page where the disk space requirement is supposed to be. I just picked the default installation. A search of the forums on "not enough disk space" did not return much.
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Jan 4, 2010
Logical Memory Space of 4GB is divided in to 3GB User Space and 1GB Kernel Space. Always. Correct?
1. How can we change it? (just changing value of PAGE_OFFSET is okay?)
2. If system have only 256MB of memory (embedded system) and suppose Kernel Modules eat away all the memory during boot. User space will be left will no memory. Is this case possible?
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Nov 18, 2010
I don't understand disk sizes in Linux. I have a 500GB drive. It's ext4. I have run "tune2fs -m 0" on it to reserve the amount of space reserved for root to 0.
I'm using Ubuntu 10.04 that comes with a Disk Utility. When I run "System->Administration->Disk Utility (palimpsest)" the disk shows up as 500GB (see picture). But when I run df -h it shows up as 459GB. So, I don't understand the discrepancy.
When I run df I get the following:
Question: Why is Disk Utility showing me something different than "df"?
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Apr 10, 2009
I am trying to copy some files onto a flash card. The first thing that i do is mount to the flash card:
mount /dev/sdc1 /mnt
then i try and copy a file
cp dev.bin /mnt
but i get a message saying:
cp: writing `/mnt/dev.bin': No space left on device
I was able to copy some files before but i cant seem to do it anymore.
how can i delete everything thats on the flash card so that i can copy files onto it?
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Apr 27, 2009
MountTypePartitionPercent CapacityFreeUsedSize
/bootext3/dev/sda1 11% (1%)82.82 MB10.80 MB98.72 MB
/ext3/dev/sdb1 81%31.65 GB182.29 GB225.59 GB[code].......
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Jun 17, 2009
I have a dual xeon e5420 server w/ 16GB ram running 5.3 x64 that I was trying to partition out in the following configuration:
250GB on / (root)
4.2TB on /home
50GB on /tmp
2GB on swap
The issue is that no matter what size I set the swap space to in anaconda if always shows 8GB when I "df -h". I've tried setting it to 2GB 1GB and 512MB all with the same result.
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Dec 3, 2009
I have a CentOS 5.3 x86_64 system setup as a file server, backup server, and iSCSI target. The physical machine has six hard drives, two of which (bay0 and bay1) are 1TB disks in a RAID1 mirror. Therefore, CentOS is installed on /dev/sda. My question is this: how can I format and mount the large portion of sda that's not in use right now? Here's some more info:
Disk /dev/sda: 999.6 GB, 999653638144 bytes
255 heads, 63 sectors/track, 121534 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
[code]...
As you can see I've got about 1TB of space on sda. However, when I look at my df -h command and my LVM management what I find is that I've got:
root / filesystem = 8GB and is under Vol00
swap = 2GB and is under Vol01
/var = 2GB and is under Vol02
Sounds like I have a ton of space on sda that I'm not using. It also looks like I'm using LVM, but I'm not familiar with LVM nor am I really comfortable with how I can use the rest of the 900+GB I have available on sda. how I can format and mount the rest of the free space on sda?
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Jan 13, 2011
I recently followed this guide to create a RAID1 [URL]First I partitioned the disks with fdiskI made the RAID array with
mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/sdb1 /dev/sdc1
Then I created the filesystem with
mkfs.ext3 /dev/md0
I then mounted md0 at /Video with
mount /dev/md0 /Video/
Today I made a samba-share out of /Video/Rorschach to easily put files in there from my windows7-machine (the plan is to steam from my CentOS-server to my HTPC which hasn't arrived yet).I started to put movies in there. It went just fine for a while but then I got this message:
[URL]
How is that even possible when df -h looks like this?:
[root@Rorschach Rorschach]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
446G 70G 354G 17% /
[code]...
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Mar 20, 2011
How to add swap space?
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Aug 24, 2011
CentOS 5.4 (Final) is installed on my VPS.I'd uploaded a zip file that contains a directory and some files that there are space in their names and now I can't do anything with them.
I can't move them using mv command
I can't rename them
I can only re-compress or delete the folder
how I can rename or move them?
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Dec 5, 2010
Installed CentOS 5.5 some time ago and I can proudly say I am more than satisfied with it. Managed to install codecs, flash player, media players, chrome and opera browsers and all other things I need. My only problem is that as of about a week ago my external DVD player is not recognized any more by CentOS so I am unable to watch movies. My external DVD player is Magnavox and it works great but CentOS does not recognize it any more. I used to watch movies in CentOS in SMPlayer all the time. What to do to get it back?
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Oct 29, 2009
I am using Centos5.4
My applications, after minimized, seems to disappear from the desktop.
I can still access them using Alt-Tab.
In the taskbar setting, I have enabled "Show Application icons". But that does not make the icons appear
in the taskbar after minimized.
Any suggestions to show my minimized icons in taskbar?
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Jun 7, 2011
Issue is: I'm using an external USB DVD burner and can not get the DVD to show in the linked hardware listings, so need help getting that mounted. I need it to run the recently installed MONDO.
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Jun 16, 2011
I am running centos 5. So far, it gives no problem but just yesterday, when it reported "no free space" for file writing, I try to remove some file as usual. Unfortunately this time no matter how much files I had deleted, it just keep showing no available space for doing so.
Result from df:
[root@LSMSVR ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
1.2G 269M 879M 24% /
/dev/hda6 4.8G 138M 4.4G 4% /tmp
/dev/hda5 19G 2.4G 16G 14% /usr
/dev/hda3 48G 12G 34G 25% /var
/dev/hda2 379G 365G 0 100% /home
/dev/hda1 99M 15M 80M 16% /boot
tmpfs 180M 0 180M 0% /dev/shm
ow to recover the lost space in /home?
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Sep 12, 2009
Ok, as the title indicates I have a RAID5 array with 4 500GB SATA drives. This is the only drive configuration on the system (i.e. the OS also resides in the RAID array). I'm running CentOS 5 and need to know how to go about increacing the space in the RAID array by replacing the drives with 4 1TB drives.
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Dec 29, 2009
Can some one tell me how many space does a plan CentOS 5.4 take and the minium size of the memory.
Also, what is the minium size I have to partition on /boot
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Sep 22, 2010
I had Oracle install on my machine and there were some ASM partitions. after uninstall of oracle some how it removed the swap space and now is showing:
[Code]...
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