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Best practices of using the Synology DiskStation to host iSCSI Storage
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==High-availability Computer Clustering== [[Image:Iscsi-clustering.png|250px|center]] *[[wikipedia:High-availability cluster|High-availability Computer Clustering]] is a service where multiple computers are communicating to the same iSCSI Target, and both computers are aware of the changes being to the iSCSI Target. Computer Clustering environments is used in a specific environments, and is recommended for experienced network administrators only. Using the DiskStation to host storage for a Computer Clustering environment requires the following **Proceed to the [[How_to_use_the_iSCSI_Target_Service_on_the_Synology_DiskStation#Step_3:_2|iSCSI Target Advanced Options]] of the Synology DiskStation and enable '''Allow multiple sessions from one or more iSCSI Initiators''' **Use a Cluster-capable file system; <font color=red>failure to use the correct file system can and will result in data loss and corruption</font>. ***A visual example would be to take a USB Hard drive and connect it to two different computers for dual concurrent usage. Under normal conditions, neither computer would be aware of the other computer's changes, thus if they both access the same area of space on the hard drive to read/write data, data loss will occur. **Known cluster-capable file systems are ***[[wikipedia:NTFS|Microsoft NTFS]] ****<font color=red>Requires iSCSI SPC-3 Persistent Reservation, available in Windows 2008 Server or Windows 2003 Clustering Services</font> ****[http://www.synology.com/support/download.php?lang=enu Synology DSM 3.0] or higher is required on the DiskStation. ****It's not recommended to enable compression abilities on the NTFS Volume ***[[wikipedia:OCFS|Oracle OCFS]] ***[[wikipedia:VMware VMFS|VMware VMFS]]
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