I have a problem with speed of read/write operations (3Mb/s max)
Hardware - HP DL160.
CentOS 5.5 working on VMWare ESXi4.1.
R/W operations on CentOS 5.5 without ESXi - 60Mb/s
I'm having this problem wherein the ppp program is altering the /etc/resolv.conf file when connecting.This, despite me having set file permissions to read-only. What could be the problem here?
View 9 Replies View RelatedI am new to Centos and linux in general. I have just got myself a Dell 1950 server with 2x 1T SATA2 hard disks in it. now the server comes with a PERC5i Raid card with 512Mb. Well I put these in raid 0 and the raid card initilzed the disks to 128 writeback and read ahead. When I loaded centos it did not recognize the dell layout so therefore wanted to initalize it again, so I done this as it wanted. Now I created a 80gb boot and o/s partition and a 100gb swap the rest was created into LVM space to run solus vmwear. But I found the raid 0 to be getting extreamly slow read and write speeds.
Example same disks
Desktop PC max 214mb/s windows vista 64
Server with centos 104mb/s
Now I am not sure but I am told that I need to align the o/s with the raid card settings but I have no idea how to do this. How to do this in plain easy step by step instructions. I mean how to calculate it, how to format the disk this way, and what files to edit where if needed. I have spent hours trying to figure out why my raid 0 is slower than a single disk.
I've developed a tiny webserver for home automation out of an ALIX 1D, and based on a debian lenny. It runs very smoothly and is now able to operate quite a lot of different equipment from a webapp. But i'm not sure how I should handle the compact flash, regarding read/write limitations. From what I've read the partitioning should be ext2, which would disallow the journalisation of the system. A utility to 'flatten' the repartition of write cycles exists, would it be relevant to use if the partition is ext2 ?
I will also disable all logging in execution mode (a debug mode will provide the logs). Is there any other parameters I have to take into account for maximum reliability (i.e. does the system randomly write in some files for various and potentially turned off purposes)? As for the mysql database, it's not important data, and it's actually reconstructed every time the server boots. Given this, is there a way to store the db in RAM rather than in a file? I'm not sure it's the right place to ask, but I sometimes see redirection to here from stack overflow.
I started a thread in the hardware section, but I've narrowed it down to being a software issue. The problem is that all USB devices are written to at about 1MB/s, and is read at equally slow speeds. After testing my computer on an older Ubuntu release (8.04 32bit), I verified it wasn't a hardware issue, because the read and write speeds were like they were supposed to be. Then, I downloaded the 32bit release of the Ubuntu version I'm currently using (an up-to-date version of Natty) and booted the live cd of it. It was equally slow there as well.
The read/write speeds are equally poor on openSUSE and Arch Linux, so I don't think that it's an issue with Ubuntu, as much as it seems like a kernel issue (or maybe not, you guys can correct me if it seems like it isn't ).
I am running Lenny. USB storage devices are painfully slow, if the data to be copied is above 4GB it works on transferring for more than half an hour and then comes up with an error dialog(saying something like file size is too big). The problem exists in both read and write.
I did google a bit and here is the output of lsmod | grep hci
ehci_hcd28428 0
uhci_hcd18672 0
usbcore118192 4 usb_storage,ehci_hcd,uhci_hcd
[Code].....
I installed CentOS 5.5 32-bit with Gnome and want to use it as a file server. The volume I wish to share is a 1.5TB NTFS partition stored on a USB drive. I installed "ntfsprogs" and "fuse-ntfs-3g" to get NTFS support. However, I only have read access to the volume.
How can I fix this and get Read+Write to the NTFS drive?
After installing the "fuse" and "fuse-ntfs-3g" packages, my ntfs formatted thumb drive mounts read only, as follows:# mount.../dev/sdb1 on /media/disk type fuseblk (rw,noexec,nosuid,nodev,allow_other,default_permissions,blksize=4096)
View 17 Replies View RelatedOn one Ubuntu desktop 10.04 I got an ati 4800 series using the proprietary drivers. All was working well until a reboot a couple of days ago. I am not sure if it had something to do with one of the massive updates I installed on that day. After that, operations like scrolling, moving windows etc have been dramatically slow. I tried to boot from live cd with 10.04 and everything seemed ok.
View 3 Replies View RelatedI am trying to install the reiserfs drivers to read/write to my external drive. But keep getting command not found. Although the system can get man pages for modprobe.
modprobe reiserfs
bash: modprobe: command not found
I also need to know how to add myself to the sudoers file. I have already tried visudo but this has not worked.
I Have Configure Samba server in Centos, I need give permission like for some user(5User) can able to read and write the particular folder, and again i need give some another user(6user) can only read permission for same folder.
View 1 Replies View RelatedWe are having some problems in running CentOS 5.3 in our ESXi 3.5 environment. The virtual machine is running perfectly under VMWare Player, but when I converted it to ESXi using VMWare vCenter Converter 4.0.0, the CentOS often goes into a panic right at the start of stops when setting up the hostname.
View 1 Replies View RelatedI can't install centos 5 on vmware esxi 4 server.I use the netinstall cdrom and I get the splash screen with the kernel menu.After this, I can choose a language but then I get this error: "The CentOS CD was not found in any of your CDROM drives. Please insert the CentOS CD and press OK to retry."
I have tried it with the image on the datastore, a unc-path and as physical cdrom.I have tested all modes in the vmware cdrom settings (passthrogh IDE or Emulate IDE) - nothing helps.
Console 3 shows me:
loaded mptbase from /modules/modules.cgz
loaded mptscsihfrom /modules/modules.cgz[code]...........
This is my first post, and i have a question with the fence software for VMWare ESXi. The fence_vmware agent only works with ESX, and redhat (in you GIT repository) has submited a new agent called fence_vmware_ng that claims to work with ESXi. But the problem is that they do not specify the version that works with that. Anybody has test the fence_vmware_ng agent for VMWare ESXi 4.0 ?, i follow the instructions here: [URL]...and i can install the software, the API from VMWARE site, etc, but in the moment when i run the agent nothing happen, The agent connects to server, i see in logs, but the off-reboot-on operations not works. Only works status operations, that return the state of a virtual machine. I have CentOS 5.3 (fully today updated) with RHCS.
View 6 Replies View RelatedRunning a 5.2 VM on ESXI, and the software updater keeps dying when I try to download some development packages (default libraries and tools). yum installs packages just fine - it's only if I use the add/remove software. See error log below:
[Code]...
Installed CentOS 5.5 on VMware ESXi server running vsphere 4.1. Installed fine and picked the E1000 network adapter. But can't get the adapter to become active and pick up an IP address. Has anyone done this before? I can't get it to work. When i was testing CentOS out i used VirtualBox and worked fine using bridged networking but just can't seem to get this network card working.I've put some pictures of the config i've got.http:[url]....
View 2 Replies View RelatedWhat are the possible problem when Windows access the file from Ubuntu got Read Only even though have a full permission to read, write and execute the file? Ubuntu to Ubuntu accessing the file there is no problem only Windows got a problem.
View 1 Replies View RelatedI did install QLandkartGT and the plugin to use Garmin with it and it looks like it work, but when I do press "Live Log" I get the error message; "Device Link Error. Failed to request real time position. Realtime thread failed. Failed to configure USB: could not set config 1: Operating not permitted".
I also get a similar error when trying to download tracks; "Failed to download tracks. Failed to configure USB: could not set config 1: Operation not premitted".
My guess is that Ubuntu do not allow programs to use the USB port, so my question is how I do allow this program (or all) to use the USB ports.
I want to use dual Monitor on Debian Lenny amd64, I have the nVidia 8600 GTS. I googled several times, I have to change the xorg.conf (as it seems) but I can't - no rights.
And there's another thing... I have a dual boot system along with the openSUSE HDD but I can't open it. And using openSUSE I can't read or write on the Debian's HDD. How can I change that?
I can't see any option for recursive directories in nfs in fedora 13.
This is my set-up:
Code:
Code:
save and exit.
Code:
When i mount the directory /media/Data from another Fedora 13 box i don't have read and write permissions for each and every file. The -R recursive option would be handy unfortunately this option is unavailable. The red hat docs have not been helpful in this respect.
Code:
Code:
The mounted partition is of the ext3 type. With the nfs-3g type i don't have any issue however most of my directories/partitions are of the ext3 type so i need get it sorted.
I changed my user name id number to the same number on all boxes thus giving me write access. There must be a better solution than this.
I just installed Ubuntu 10.04 on my system, and I put in a really old game CD for my really old computer. I cannot run the setup program , however because "it is not executable". I can't change this , because it is read-onlybut I can't chane this either. As I'm new to this, I was wondering .
View 5 Replies View RelatedI have a netbook with Ubuntu 10.10 installed in it,and a Pc with also ubuntu 10.10 in it , but x86_64.
I want to copy some iso files and data from my user home directory on the netbook , to the user home directory of the other pc , using a 8 GB usb formated in ext3 with gparted in my pc.
One iso is a windows 7 one to burn then with K3b , as i need to have windows installed in that box. Also of another iso that i have to burn too (windows 7 recovery disk) , and 3 anti-virus trials for windows.
As the usb is owned by the root (or more properly the mounting point,no?), and i can't use my user to copy data to it i usually do :
Usually , what i use is "sudo nautilus" then go to the place where is the data , copy it , and paste it then in the usb. Then in the other pc i do a chgrp and chown to the iso or file.
But , perhaps this is not the better approach. I have investigated a bit , and i think that i have found a better way , but i have some dudes.
The method is change the owner,group and permissions of the mounting point:
Code:
cd /media
ls
umount /dev/sdb1
sudo mkdir usb
[Code].....
If i do this steps in both computers, with each user,in the netbook i can copy the iso to the usb (as fox can write to the mount point of the usb ), but can the other user in the pc 'mulder' read the iso , so be copied to /home/mulder, and then be able to burn it in k3b with success ?
I suppose that having 766 , it should be able to read it , but would have the own of the file ?
How important is not to only be able to read it , but also own it ?
I suppose if the user ID is the same , wouldn't be any problem ,as each ubuntu would supose that the file is owned by their user.
Perhaps the user name change,but if the ID is the same , the user is the same for ubuntu , not any different, no ?
sudden of all all USB drives and sticks I put into a PC will not mount with read/write permissions (they did before). I can still copy to them, but only when I am root. I am on Maverick I've noticed though that if I run disk utility, then UNMOUNT the partition, Check File System, Mount the partition back, I get read/write access..
View 9 Replies View RelatedRecently i acquired an electroencephalograph (EEG) and started to experiment with it, and i need some way to write or send a couple of Hex numbers to the EEG so it will start working, and then to save the data on text file, or at the very least see the output on the terminal using C or C++, i found some programs around the forums but none seem to work properly and more often than not, The EEG is recognized as /dev/ttyUSB0 has a baud rate of 921600.
View 2 Replies View RelatedI installed SAMBA and SWAT, latest versions. What I want to accomplish is to give Windows users unlimited read/write access to the entire filesystem, eg. (/). Barring that, I'd like to at least be able to configure full access to individual directories.And by "unlimited", I mean being able to edit and delete everything that would be normally accessible only by the root user. I want to grant the Windows users of the shares access as if they were root users.
View 2 Replies View RelatedI have been given a headless linux system running from a SD card. I get into it by putty, directly to root, not other user and even /home dir. Whatever I copy or write will dissapear because is ro.
my etc/fstab file is:
none /dev/pts devpts gid=5,mode=620 0 0
none /proc proc defaults 0 0
none /dev/shm tmpfs defaults 0 0
/dev/hda1 /boot vfatnoauto,rw 0 0
how to read and write i.e setting of hardware clock through c program on linux
View 5 Replies View Relatedif i have a dir with several mp3's files:
example:
[root@xxx]ls -l
-rwxr-xr-x 1 web2 client1 6222573 Nov 26 17:34 01 Artist1 - Song1.mp3
-rwxr-xr-x 1 web2 client1 4989384 Nov 26 17:34 02 Artist2 - Song2.mp3
-rwxr-xr-x 1 web2 client1 6987438 Nov 26 17:36 03 Artist3 - Song3.mp3
and i need to update the id3 tag of all files with the command:
/usr/bin/id3v2 -a "Artist1" -t "Song1" Artist1 - Song1.mp3
how i do a loop to read the filename and execute the id3v2 command for each file, as i have filenames with spaces and special chars ex:"".
When I plug in a usb flash drive, my Debian mount it, but when i am going to write, mkdir, rename file or paste a file permission denied.
The result of Code: Select alldev/sdc1 /media/usb0 auto rw,user,noauto 0 0
is Access denied
Is there also an chmod GUI for read and write permissions?
View 5 Replies View Related