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I've had excellent repeated success with the Udpcast boot disks imaging physical drives between computers as long as there is only one hard drive on the IDE chain on each machine. I've backed-up and restored numerous times with different systems. This is fine except I want to keep my backups as image files on a larger volume.
I have not been successful getting the udp-receiver executed on Fedora Core 5 on the target machine to play with udp-sender from the boot disk on a notebook I want to back up. I'm hoping to use the Fedora machine to back up and restore several other machines on my network to a new 250GB drive mounted on the Fedora box.
On the notebook (or any machine to be backed up) I boot from the Udpcast boot CD and manually set the IP address. I take the default values for everything else, except I select no compression. I then start udp-sender on the CD-booted machine. It executes with the normal broadcast messages.
Then I go to the Fedora machine and execute the following: "udp-receiver --file <path/file.img> --log <path/file.log>" and press enter. The sender machine immediately acknowledges and establishes a connection with the receiver machine. The sender machine displays the "Press any key to start" message, but udp-receiver on the Fedora machine shows nothing in response. The receiver machine (Fedora box) appears to sit idle as if it is not getting something it needs; there is no "Press any key to start" message on the receiver machine. If I hit a key on the sender machine anyway to get it started it starts transmitting but promptly starts displaying timeout lines and eventually quits. After killing the receiver with CTRL-C, two empty files, <path/file.img> and <path/file.log> are on the target volume. There is nothing in those files, even when viewed with a hex editor. I have observed that the two systems are using different multicast addresses, but they still find each other.
I have scoured the man pages of both udp-receiver and udp-sender, and experimented with several Udpcast switch combinations to no avail. I've tried --nosync, --broadcast, --mcast-all-addr, --mcast-rdv-address (which crashed the sender and displayed a SIG message), --nokbd, - --autostart 50, --ttl 1, --rexmit-hello-interval 1000, - --retries-until-drop 100 (which also crashed the sender and displayed a SIG message), --point-to-point, and -b 1024. Nothing changed from any of that; udp-receiver never provides a "Press any key to start" message, even after the sender recognizes the established connection and displays the "Press any key to start" message.
I also tried booting the receiving machine from the Udpcast boot CD and trying the --file <path/file.img> option there, but it just seemed to transfer a physical copy of the /boot folder from the sending machine. So, I repartitioned the target drive and am hoping there is some way to make Udpcast work in my configuration by writing physical images of the source drives to logical image files on the target drive. And, naturally, I would like to restore from image files on the storage volume mounted on the Fedora machine to physical disks on the target machines.
Help.
Thanks, Mark
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Mark Caldwell Walker GnuPG public key is available at http://www.earthalien.com/#pubkey
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On 7 May 2006 at 12:30, Mark Caldwell Walker wrote:
Date sent: Sun, 07 May 2006 12:30:00 -0400 From: Mark Caldwell Walker marwalk@marwalk.com To: Udpcast list udpcast@udpcast.linux.lu Subject: [Udpcast] Boot Disk to Mounted Udpcast
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I've had excellent repeated success with the Udpcast boot disks imaging physical drives between computers as long as there is only one hard drive on the IDE chain on each machine. I've backed-up and restored numerous times with different systems. This is fine except I want to keep my backups as image files on a larger volume.
I have not been successful getting the udp-receiver executed on Fedora Core 5 on the target machine to play with udp-sender from the boot disk on a notebook I want to back up. I'm hoping to use the Fedora machine to back up and restore several other machines on my network to a new 250GB drive mounted on the Fedora box.
On the notebook (or any machine to be backed up) I boot from the Udpcast boot CD and manually set the IP address. I take the default values for everything else, except I select no compression. I then start udp-sender on the CD-booted machine. It executes with the normal broadcast messages.
Then I go to the Fedora machine and execute the following: "udp-receiver --file <path/file.img> --log <path/file.log>" and press enter. The sender machine immediately acknowledges and establishes a connection with the receiver machine. The sender machine displays the "Press any key to start" message, but udp-receiver on the Fedora machine shows nothing in response. The receiver machine (Fedora box) appears to sit idle as if it is not getting something it needs; there is no "Press any key to start" message on the receiver machine. If I hit a key on the sender machine anyway to get it started it starts transmitting but promptly starts displaying timeout lines and eventually quits. After killing the receiver with CTRL-C, two empty files, <path/file.img> and <path/file.log> are on the target volume. There is nothing in those files, even when viewed with a hex editor. I have observed that the two systems are using different multicast addresses, but they still find each other.
You might be having a problem with the selinux/firewall. You could try to use system-config-securitylevel or System / Admiistration / Securitylevel and Firewall. Then add port 9000 and 9001 to the ports allowed. It's been a while since I used udpcast from fedora core 1 machine, but I recall it was these changes that I needed to make.
In my configuration, I use udpcast to image the other 19 machines in my lab, but use g4l to create images on my fedora core 3 system with two 250GB drives. G4l creates images that work with udpcast directly as well, (at least I've done it in the past, dd | compression | ftp). Problem I had was my MIS department has the dhcpd setup with 4 class c networks on the physical network, and classroom machines would get IPs on 3 of the different IP blocks, and udpcast would only work to machines on the same class C. So I image one machine in the classroom, and then use a boot diskette that gives each machine a private 10.0.0.x number, and then image them with udpcast.
G4l uses dd to copy the image, and can use gzip, lzop, bzip or no compression. I generally use lzop since it about twice as fast to create the image on my P4 machines, but does make the image about 10% or so larger than gzip, but 1 hour versus 2 hours is more important to me. The restore speed is almost the same.
I have scoured the man pages of both udp-receiver and udp-sender, and experimented with several Udpcast switch combinations to no avail. I've tried --nosync, --broadcast, --mcast-all-addr, --mcast-rdv-address (which crashed the sender and displayed a SIG message), --nokbd,
- --autostart 50, --ttl 1, --rexmit-hello-interval 1000,
- --retries-until-drop 100 (which also crashed the sender and displayed a
SIG message), --point-to-point, and -b 1024. Nothing changed from any of that; udp-receiver never provides a "Press any key to start" message, even after the sender recognizes the established connection and displays the "Press any key to start" message.
I also tried booting the receiving machine from the Udpcast boot CD and trying the --file <path/file.img> option there, but it just seemed to transfer a physical copy of the /boot folder from the sending machine. So, I repartitioned the target drive and am hoping there is some way to make Udpcast work in my configuration by writing physical images of the source drives to logical image files on the target drive. And, naturally, I would like to restore from image files on the storage volume mounted on the Fedora machine to physical disks on the target machines.
Help.
Thanks, Mark
Mark Caldwell Walker GnuPG public key is available at http://www.earthalien.com/#pubkey
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+----------------------------------------------------------+ Michael D. Setzer II - Computer Science Instructor Guam Community College Computer Center mailto:mikes@kuentos.guam.net mailto:msetzerii@gmail.com http://www.guam.net/home/mikes Guam - Where America's Day Begins +----------------------------------------------------------+
http://setiathome.berkeley.edu Number of Seti Units Returned: 19,471 Processing time: 32 years, 290 days, 12 hours, 58 minutes (Total Hours: 287,489)
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Mark Caldwell Walker -
Michael D. Setzer II