iSCSI Manager Technical Specifications

High performance and reliable storage solutions for virtualization environments
Intuitive iSCSI service management and monitoring
Virtualization certifications including VMware^® vSphere^™, Microsoft^® Hyper-V^®, Citrix^® XenServer^™, and OpenStack Cinder

Maximum iSCSI targets: 256 (See limitation 1)
Maximum LUNs: 512 (See limitation 1)
Maximum snapshots per LUN: 256 (See limitation 1)
iSCSI LUN Clone/Snapshot (See limitation 2)
Two types of space allocation: Thin Provisioning and Thick Provisioning
iSNS (Internet Storage Name Service)
Customizable I/O queue depth
Low-capacity protection mechanism
LUN Defragmentation to improve LUN performance
Online LUN capacity expansion
CHAP and mutual CHAP authentication
Access control by IQN
CRC Checksum for checking for errors that occur during data transmission
Schedulable snapshot tasks with custom retention policies
Supports VMware VAAI features:
- Thin Provisioning Stun
- Hardware Assisted Locking
- Full Copy
- Block Zero
Supports Windows ODX
Supports space reclamation
Supports assigning network interfaces to provide iSCSI services
Snapshot Replication: Offsite snapshot replication and recovery
Synology Hyper Backup: Scheduled tasks to back up LUNs to local shared folders, external devices or another Synology NAS
Snapshot Manager for VMware/Windows: Application-consistent snapshots
Synology High Availability (SHA): Ensures the reliability of LUN and iSCSI services
Synology SMI-S Provider: Allows administrators to manage Synology NAS as a storage device via centralized user interface of SCVMM
VMware Site Recovery Manager: Allows administrators to enable disaster recovery directly via VMware vCenter Server, simplifying complicated configurations and optimizing the process

The maximum number of LUNs, targets, and snapshots varies according to models (Refer to the software specifications of your Synology products)
iSCSI LUN Clone/Snapshot are only available on specific models (Refer to the software specifications of your Synology products)
Snapshots and space reclamation are not supported on Thick Provisioned LUNs
Only Thin Provisioned LUNs created on Btrfs volumes on DSM 6.2 and above versions support instant snapshot and restoration
Maximum number of concurrent LUN backup tasks: 1
Minimum LUN size: 1 GB
Minimum legacy advanced LUN size on ext4 volumes: 10 GB
Defragmentation is only supported on Thin Provisioned Btrfs LUNs
LUNs with the snapshot feature enabled or legacy advanced LUNs can be cloned quickly only within the same volume
Converting legacy advanced LUNs will also delete the snapshots of the LUNs
Discovery with CHAP authentication is not supported
Only legacy advanced LUNs support three modes for space reclamation
- Prioritize I/O Consistency
- Balanced
- Prioritize Reclamation

Monitors multiple Synology NAS on VMware vSphere Client
Optimizes the transfer performance of shared folders/LUNs and connection stability between hosts and Synology NAS
Supports application-consistent snapshots

System requirements
- VMware
  - vCenter Server Appliance 6.5 U2 or above
  - vSphere Client (HTML5 only)
- Synology: DiskStation Manager 6.2.3 or above
Streamlines vSphere Client datastore creation wizard with integrated creation process of LUNs/shared folders on Synology NAS
Supports ESXi host setting optimization to improve transfer performance and connection stability

Storage Console virtual machine requires a minimum of 16 GB of available space on the datastore

System requirements
- Windows: Windows Server 2012, Windows Server 2012 R2, Windows Server 2016, Windows Server 2019
- Synology: DSM 6.2.3 or above
Supports monitoring LUN/volume statuses on multiple Synology NAS

Synology Storage Console for Windows and Synology Snapshot Manager for Windows cannot be installed on a Windows Server at the same time

Supports SMI-S standard and integrates System Center Virtual Machine Manager (SCVMM) to facilitate the management of multiple Synology NAS

System requirements
- Windows: Windows Server 2012, Windows Server 2012 R2, Windows Server 2016, Windows Server 2019
- Synology: DSM 6.1 or above
- Port 5988 for HTTP and port 5989 for HTTPS must be enabled
Supports the management of LUNs and targets via SCVMM
- Creating and deleting LUNs
- Creating targets
- Configuring LUN and target mapping
- Configuring target masking

Supports managing iSCSI LUN replication directly on VMware Site Recovery Manager Server