System Requirements - Hot Copy

System Requirements 

Installer RPM & APT Packages
Memory Recommended Minimum 512 MB
Linux Kernel 2.6
File Systems Works with any local file system 

Note:  Cannot snapshot remote Network File Systems
Disk Space Block devices should have at least 15% free space available.  Alternatively, specify a file system with more free space to store Hot Copy changed blocks.
Disks and Volumes Virtually Any Block Device 
IDE, SATA, SCSI, SAS, ISCSI, Fibre Channel, 
LVM, MD (Software RAID), Hardware RAID, DRBD

Linux Distributions

Linux Distribution Edition
RedHat Enterprise
32-bit (x86) & 64-bit (x64)
RHEL 4, RHEL 5, RHEL 6
CentOS
32-bit (x86) & 64-bit (x64)
CentOS-4, CentOS-5
Ubuntu
32-bit (x86) & 64-bit (x64)
5.04 (Hoary Hedgehog), 5.10 (Breezy Badger), 6.06 (Dapper Drake), 6.10 (Edgy Eft), 7.04 (Feisty Fawn), Ubuntu 7.10 (Gutsy Gibbon), Ubuntu 8.04 (Hardy Heron), Ubuntu 8.10 (Intrepid Ibex), 9.04 (Jaunty Jackalope), 9.10 (Karmic Koala), 10.04 (Lucid)*, 10.10 (Maverick)*
Fedora
32-bit (x86) & 64-bit (x64)
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12*
Debian
32-bit (x86) & 64-bit (x64)
4.0 (Etch), 5.0 (lenny), 6.0 (Squeeze)*
Novell SUSE Enterprise Server
32-bit (x86) & 64-bit (x64)
10, 11
Open SUSE
32-bit (x86) & 64-bit (x64)
10, 11
Mandriva
32-bit (x86) & 64-bit (x64)
2008, 2009, 2010

Virtualization

Technology Physical Server Install? Guest (Virtual Machine) Install
Citrix XenServer 5 No Install into guest VMs (domU)
Xen Source Hypervisor No Install into guest VMs (domU)
VMWare ESXi No Install into guest VMs
VMWare Server No Install into guest VMs
VMWare Workstation No Install into guest VMs
Parallels Virtuozzo Yes, protects all Virtuozzo containers with one install No, cannot be installed into individual Virtuozzo containers
KVM No Install into guest VMs


Known Linux kernels with severely broken Ext4
There was an issue with Ext4 introduced in "vanilla" Kernel.org kernel 2.6.32 and has been patched and released "down stream" into various Linux distributions. When any Ext4 file system snapshot is performed on an effected kernel, the file system can deadlock, causing a hung or crashed operating system. This is a Linux bug completely out of the control of R1Soft.

Do not use the following Linux kernel versions with Ext4:

  • Ubuntu Lucid (10.04) Betas and Release Candidates - we have reports that Ubuntu Lucid 2.6.32-24.41 and greater are fixed
  • Ubuntu Maverick (10.10) Betas and Release Candidates
  • Debian 6 (Squeeze) Betas and Release Candidates
  • Fedora Core 12 Betas and Release Candidates
  • Xen (4.0 / 4.1) - Do Not use Ext4 on 2.6.32-5-xen - 2.6.32-35-xen_02
More Information:

Kernel.org Bug Report
https://bugzilla.kernel.org/show_bug.cgi?id=16278

Ubuntu Bug Report
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/595489