====== AhsayACB =====
Last modified: 2023/06/20
AhsayACB is the agent for backing up files on desktops and laptops, cloud files, as well as Microsoft 365 as individual user.
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===== System Architecture =====
Below is the system architecture diagram illustrating the major elements involved in the backup process among the backup machine, AhsayACB and AhsayCBS.
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===== Requirements =====
==== General ====
=== Hardware Requirements ===
For details of the minimum and recommended requirements for installing AhsayACB, refer to: [[public:version_9:start_here:9000_ahsay_hardware_requirement_list_hrl_for_version_9.1_or_above|Ahsay Hardware Requirement List (HRL)]]
=== Software Requirements ===
For the list of compatible operating systems, refer to: [[public:version_9:start_here:9005_ahsay_software_compatibility_list_scl_for_version_9.1_or_above|Ahsay Software Compatibility List (SCL)]]
For the list of compatible operating system for OpenDirect, refer to: [[public:version_9:start_here:9006_ahsay_scl_for_granular_and_opendirect_restore_v9
|Ahsay Software Compatibility List (SCL) for Granular and OpenDirect Restore]]
=== Antivirus Exclusion Requirement ===
To optimize performance of AhsayACB on Windows, and to avoid conflict with your antivirus software, refer to this [[public:version_9:start_here:9023_suggestion_on_antivirus_exclusions|list of processes and directory paths that should be added to all antivirus software white-list / exclusion list]].
==== Windows ====
The bJW.exe process is automatically added to Windows Defender exclusion list for Windows 10, during installation / upgrade via installer or upgrade via AUA.
==== Mac OS X ====
These are the limitations to AhsayOBM running on Mac OS X:
=== Installation on Root Drive ===
AhsayACB must be installed on the root drive of a volume (e.g. /Applications/...).
=== Resource Fork Files ===
Resource fork files cannot be restored with AhsayACB installation on Mac OS X 10.8 above.
=== Case-Insensitive File System ===
For volume with a case-insensitive file system, target file of a symbolic link will be backed up twice (in both upper case and in lower case), hence, doubling the backup quota storage requirement.
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===== Documentation =====
* [[https://www.ahsay.com/jsp/en/downloads/ahsay-downloads_documentation_guides-acb.jsp|AhsayOBM and AhsayACB guides]]