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Best practices of using the Synology DiskStation to host iSCSI Storage
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==Block or File-level iSCSI Targets?== [[Image:Iscsi-layer.png|600px|center]] *With the Synology DiskStation, there are two "levels" of iSCSI: **'''Block-level''': Operates at the level closest to the RAID level, offers greater performance. Using a Block-level iSCSI will create a target whose capacity will be equivalent to the size of the RAID Volume. **'''File-level''': Operates at the File-system level and offers greater flexibility, where the RAID Volume storage can be shared between regular file sharing duties, and virtual storage space. **Please look [[How_to_use_the_iSCSI_Target_Service_on_the_Synology_DiskStation#Step_4:|here]] for information on how to create a target using Block-level or File-level iSCSI Targets. **Be sure to select a redundant RAID Volume, such as RAID-1, RAID-5, or RAID-6 when creating either type of iSCSI Target, to ensure at least 1-disk redundancy against disk failure. *When to use Block-level iSCSI Targets **If the intention of the DiskStation will be strictly that Virtual Storage purposes only ***Please ensure that that the File System of the Initiator is capable of addressing a large hard drive (some file systems cannot recognize targets which are greater than 2TiB, for example) *When to use File-level iSCSI Targets **When the DiskStation will be used for shared storage duties, for file sharing, and hosting virtual storage. **When the File System of the Initiator cannot recognize a large hard drive. ***For example, a DS1010+ with 5x2TB drives in RAID-5 would provide 7.28TiB of Redundant Storage, to use this for iSCSI Storage, if the Initiator File System cannot recognize greater than 2TiB, then, 3x2TiB File-level iSCSI Targets will have to be created. And the remaining 1.28TiB can be used for another iSCSI Target or for regular file-sharing duties.
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