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VHDX (Virtual Hard Disk v2) is the successor format to VHD. Where VHD has a capacity limit of 2040 GB, VHDX has a capacity limit of 64 TB. For disk images with this newer format the filename extension vhdx is used instead of vhd. VHDX protects against power failures and is used by Hyper-V. [23] VHDX format is optimized for both HDD and SSD.
Virtual disk and virtual drive are software components that emulate an actual disk storage device.. Virtual disks and virtual drives are common components of virtual machines in hardware virtualization, but they are also widely used for various purposes unrelated to virtualization, such as for the creation of logical disks,software development, testing environments, and data management.
In the table below, the column "ISO 8859-1" shows how the file signature appears when interpreted as text in the common ISO 8859-1 encoding, with unprintable characters represented as the control code abbreviation or symbol, or codepage 1252 character where available, or a box otherwise. In some cases the space character is shown as ␠.
Security Identifier (SID) is a unique, immutable identifier of a user account, user group, or other security principal in the Windows NT family of operating systems. A security principal has a single SID for life (in a given Windows domain), and all properties of the principal, including its name, are associated with the SID.