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The application of a Dynamic Drive Overlay (DDO), as licensed to Samsung Corporation for example, by Kroll Ontrack's version in their Disk Manager program is for the installation of various hard drives (Ultra/Super IDE/Parallel ATA) in computers that have older BIOS chips that do not recognize hard disk drives larger than 137.4 Gigabytes. [1]
The main differences between basic and dynamic disks are: [8] [9] Dynamic disks support multi-partition volumes; basic disks do not. Windows stores basic disk partition information in the registry and dynamic disk partition information on the disk; Dynamic disks allow more flexible configuration without the need to restart the system.
Failure groups are defined within a disk group to support the required level of redundancy. For two-way mirroring, a disk group might contain two failure groups, in which case individual files are written to two locations. Oracle ASM Dynamic Volume Manager provides the foundation for the ASM Cluster File System (ACFS). [2]
In Linux, Logical Volume Manager (LVM) is a device mapper framework that provides logical volume management for the Linux kernel. Most modern Linux distributions are LVM-aware to the point of being able to have their root file systems on a logical volume .
Hypervisor support. In the hypervisor support mode, QEMU either acts as a Virtual Machine Manager (VMM) or as a device emulation back-end for virtual machines running under a hypervisor . The most common is Linux's KVM but the project supports a number of hypervisors including Xen , Apple's HVF, Windows' WHPX, and NetBSD's NVMM.
This driver provides support for four kinds of memory backed virtual disks: malloc, preload, vnode, swap. Disks may be created with the next command line tools: mdconfig and mdmfs. An example of how to use these programs follows. [3] To create and mount memory disk with mdmfs: # mdmfs -F newimage -s 5m md0 /mnt
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ZFS (previously Zettabyte File System) is a file system with volume management capabilities. It began as part of the Sun Microsystems Solaris operating system in 2001. Large parts of Solaris, including ZFS, were published under an open source license as OpenSolaris for around 5 years from 2005 before being placed under a closed source license when Oracle Corporation acquired Sun in 2009–2010.