pls suggest me how to mirroring two hard disk drive in rhel9 server.i can do raid on those hard drive but user requer mirroring.so pls help how could i do this, mirror two hard drive.
View 2 RepliesI'm setting up two media servers - one will be primary and the second will be the failover box if the first one dies. My original plan was to use Heartbeat and DRBD to replicate the first to the second, but it turns out DRBD has a limitation of 16TB per volume, and my RAID 6 is 30TB in size. I'm trying to figure out some options.
One is to split the partition into two, so it's under the 16TB limit of DRBD, share both partitions, and then use LVM to join them as a single volume at the OS level. I'm not sure what kind of performance hit that will make on read/write access since now it will need to go through LVM *and* DRBD.
Two is to use something like GlusterFS or XtreemFS. However, I am wary of both of those as the first is a FUSE-based system and isn't really tuned for performance, and XtreemFS is still kind of beta-ish.
Three is good old rsync, but that is a bit too asynchronous in my opinion. I'd like to be able to fail over virtually instantly and not lose any content.This is a production system and performance of the disk systems are paramount, followed by reliability.
Copy of IBM Server hard disk data to Another USB External Hard disk?
View 2 Replies View RelatedI am using Ubuntu 10.10. I have a system set up with 1tb HD. I also have another 1tb HD which I'd like to use to mirror the other drive. So if the primary HD fails I can boot and operate from the mirrored drive. I've read that this is possible by using Raid. however I am confused if it is possible to set-up with a HD which is already set-up Ubuntu system. Also what what I can make out the mother board does not have a raid option.
View 2 Replies View RelatedI have decided to try to run a web server, with a view to possibly, eventually, hosting my own website.To test the water I downloaded ClearOS and SME Server with a view to installing on a spare partition and trying them out.But, both installers seem to require the whole HDD to install into. Both installers have a warning saying that all partitions and drives attached to the PC will be erased in order to 'initialise' the HDD.
I must've installed 100 linux distros and i've never seen this before, including CentOS 5.5, which ClearOS is based on.Why is this the case? Is there any way I can install alongside another linux installation?? I have tried vbox but it doesn't offer a proper sandbox really as there is only one NIC.
I currently have a centos 4.4 I believe running with a 250GB hard drive. I want to make an image of that hard drive. I have tried removing the drive and connecting it to my windows pc using an adapter that would allow my windows machine run the hard drive as it was a regular external hard drive. Of course windows doesn't reconize that drive since it is linux partitioned. I am thinking that I need to have the hard drive inthe box I am wanting to copy and put in a blank drive in the box that I want to copy to. And boot from a live CD and use cat or dd to copy it. I have seen the commands before bust I am thinking this is the only way. Basically I am wanting to have a duplicate of the drive and build a whole new server that is already all setup.I will just change the host name and assign it another Public facing UP. Is this correct? Oh, and the new server will have different hardware. Might even be AMD or intel different from source or destination.
View 12 Replies View RelatedI have two identical 160GB hard drives and I'm planning on setting up a server, probably ubuntu, for Glassfish, mysql and subversion. ince I'm using those applications I'm assuming I should have a large var partition for mysql, and /opt for glassfish and I'm not sure about subversion. Is there a good partition layout you can suggest for me for my 2 drives?
View 1 Replies View RelatedI have a mail server on Fedora 8. I would like to have a mirror to this server so that it takes over in case my server goes down
View 3 Replies View RelatedI have been trying to install centos on my hp servers and when i get to partitions my hard drives the OS does not detect any harddrives. I have 4 scsi drives and i believe a intergrated smart array controller.
View 1 Replies View RelatedWe are having sixty machine super micro X7DWT-INF all are working fine all machine having two 250 GB Hard disks in SATA 0 & 1 connector operating system is scientific linux 5.4 all machine are showing hard disks as a sda,sdb,sdc etc but in 1 machine SATA Hard disks are showing as hda,hdb,etc due to this machine speed is low as compared to other machine bios settings are same as other how to change hda to sda.
View 6 Replies View RelatedI have a MythTV backend setup with videos also transcoded to a directory for streaming to my Roku frontend. A week ago, the backend had an issue that caused the hard disk to fill up, which borked a bunch of things up. I've since repaired the damage (and learned a lot about log size settings for logrotate.d). Anyway, my last problem is that a script I wrote to compare the files in the transcoded directory to the MythTV base directory and delete files no longer relevent doesn't work anymore. I get the following error when run by any user, including root:
Code:
bash: ./roku-autoexpire.sh: /bin/bash: bad interpreter: Permission denied
The script worked fine before the hard disk fill, but now I can't seem to get it to work. Both the original MythTV partition and the streaming partition are XFS. Here's the pertinent lines from fstab:
Code:
/dev/sdb1 /var/www/mythroku xfs defaults,auto,grpid,exec,user 0 0
/dev/sdc1 /mnt/mythtv xfs defaults,exec,user 0 0
Permissions for the directories are the following:
Code:
drwxrwxr-x 2 mythtv mythtv 16384 2010-12-13 19:21 /var/www/mythroku
drwxrwxr-x 2 mythtv mythtv 20K 2010-12-13 20:13 /mnt/mythtv
I tried fiddling with the mount options for the partition, but that didn't seem to solve the problem.
how can I check if disk devices are running at the proper speed (read/write access)?What are, for example, the correct values for ATA o SCSI device, if I test them with hdparm?
View 2 Replies View RelatedTo use squid i want to install linux in my 200 GB hard disk. I need guidance regarding to installation phase.A server which will be dedicated for squid proxy what things should I keep while installing my red hat linux operating system.I mean the partition sizes for swap ,root ,boot and any partion for squid cache should I need during making partitions ?
View 2 Replies View RelatedI have Red Hat linux server with update 8. Explain me in detail how to connect external hard disk to linux server so that it will detect it. Also let me know how can i come to know whether the linux server has detected it. Also how to copy the linux server harddisk content/data to this USB External hard disk
View 8 Replies View RelatedWhen level 3, we can use only command. What can I do to check for Hard Disk usage such as used space, free space, total space.
View 4 Replies View RelatedI want to configure Name Server i.e., DNS to my red hat linux box in a production enviromnt.The ram is 2 GB and Hard Disk size is 200 GB. How much space should I give /var, /usr, /boot, /root and home partition. May be I am wrong in partition point of view while installing fresh red hat but to install for home purpose and server end is different. So kindly guide me the hard disk partition size to ready it for name server.
View 3 Replies View RelatedI have a mail server on Fedora 8. I would like to have a mirror to this server so that it takes over in case my server goes down.I dont know how to go about it.
View 1 Replies View RelatedI want to mirror root hard disk in SUSE LINUX 10.1.I have two 80G hard disks, I searched in google but I did not find any good link to describe this.
Code:
Server1:~ # df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda6 16G 1.2G 14G 8% /
udev 1.3G 140K 1.3G 1% /dev
[code]....
Is root mirroring is supported in RHEL /RHAS operating systems? If so, how to find out whether the root mirroring is enabled or not?
View 4 Replies View RelatedI recently bought 320 GB Trancend external hard disk and working fine days back.Earlier i could copy from and to the hard disk with out any issue. I dont know what happened after that now i am not able to write any files in to the external hard disk. This is not NTFS formatted device. here is some of the out put from terminal.
Code:
sundar@sundar-sundar:~$ fdisk -l
Disk /dev/sda: 120.0 GB, 120034123776 bytes
[code]...
I have just install debian-7.7.0-i386 on my home pc. I want to configure samba 4 in my Debian box. How may I create Hard Disk partition of 500 GB for a samba server. The professional way i want.
View 3 Replies View RelatedI have an old unuseable computer at home that became useless after a hard disk failure. I don't want to spend money on buying a new PATA IDE HDD for it, so I was wondering if I can use a PXE boot server on my notebook (using a virtual machine with Linux) and boot a Linux on the old machine with PXE without using Hard Disk. It is possible? Do I will need to make some extra configuration or use some specific enviroment do do this?
View 1 Replies View Relatedi want to configure a cluster for combining CPU / RAM / Hard disk
View 3 Replies View Relatedis there a way to write/unpack .qcow2 hard disk image directly to real hard drive in Linux?(I know it's possible to unpack .qcow2 to .raw and then dd to drive, but I'd like to skip .raw since its large)
View 2 Replies View RelatedI just installed Ubuntu 10.10 server on my server computer. I have all my files on separate hard drives and am trying to find them (I am fairly new to linux). These hard drives were unplugged during the installation. After I was done installing I shut it down and plugged them in. They are NTFS format. Will they automatically mount? If so where are they? If they do not automatically mount how can I mount them?
View 1 Replies View RelatedI have a linux box that I'm using as a ADSL router (slack 12.1).Until recently I had two hard drives in it, one for linux, and one for storing movies, music, etc.So, I have just bought another 1,5 TB disk. My plan was to add it to the same mount location: /opt/abram to expand my storage disk, only to come to conclusion that this can't be done. OK, it actually makes sense, if I thought about it I would realise it before. Anyway, what else can I do? Is there a way to add new drive to existing one in a way that would result in one 2,5 TB drive?
I tried it with mdadm, but as it turns out, it's impossible to crate RAID 0 without loosing all the data on sda1 disc.Also, it would be very cool if I could find a solution that would enable me to one day add a new drive to further expend my storage.I'm aware that I could mount my new disk to, let's say /opt/abram/Divx, or /opt/abram/mp3, but that's not the solution I'm looking for.
I have two web servers. One is active and one is in reserve. I keep the user data (web pages) in sync by running rsync every 10 minutes or so. This copies any changes from the active machine to the reserve machine. But, it's slow, only gets changes every 10 minutes, bogs down the disk, does strange things to files that are changing during the rsync process etc...
I want something that will automatically copy any changes from the active server to the reserve server as they are made. IE I hit 'save' on the active server, it copies the file to the reserve server. Simple!
I've been looking around and I see GFS which is really vastly more complicated than I need. I'm happy with read-only access on the reserve host, so I don't need distributed lock management.
I could theoretically implement this by setting inotify watchers on every file and running an SCP or rsync command when a file gets saved. So, it can't be that hard.
I do not need a true networked file system, as in something I mount over the network. I just want something to keep my disks in sync.
Blue sky thinking at the moment:I have a number of file servers, each at different sites. I would like to be able to make these appear as one, so that files on any server can be accessed from any site, and the user doesn't even see there are multiple servers.Obviously, the internet is slow, especially the upload speeds. So when a file is written the write ought to go to the server on the client's LAN - even if it was previously on another of the servers.However, for robustness, some sort of background mirroring is also wanted. If all the servers were left on and connected, they eventually end up all in sync. But this mirroring needs to be mindful of bandwidth usage; if someone writes a big file to their local server, copying that to the other servers can't interfere with normal internet usage.I think UnionFS or similar might be able to handle the unioning side, but not the mirroring stuff.
View 2 Replies View RelatedThis is a good way to backup my current system:
How to backup your system to restore your server incase the hard disk is damaged.
As a thin clint mode is possible on ubuntu ? like windows clint system login on to the server without hard disk...
View 1 Replies View Related