KernSafe > Products > iStorage Server > Enterprise
iSCSI SAN for Windows
iStorage Server Ultimate

iStorage Server is an IP SAN solution that allows you quickly export existing storages such as disk images, physical disks, partitions, CD/DVD-ROMs, tapes or any other type of SCSI based devices and even a variety of popular CD/DVD images to its client machines, which delivers immediate benefits allowing storage to be consolidated, virtualized and centrally managed. iStorage Server also provides RAID-1 (mirror) feature, which allows you create two devices for mirror backup, the mirror devices can be local image files or remote iSCSI devices. iStorage Server has been added support for Microsoft Virtual Disk File (VHD) and VHD snapshots at the recent release.

Compares between KernSafe iSCSI SAN and XTremeSAN
The following are the major product updates history list:

Version 8.0
Reconstructed and significantly improved iSCSI core for enhanced stability and performance.
Added iSCSI RDMA (iSER and RDMA replication) support.
Added configurable workers to improve single and multi-connection performance.
Brand-new built-in web management platform.
Virtual Tape devices for enterprise backup.
Virtual Write feature improvements (improved space efficiency and added support for advanced targets).
Resolved all known issues.

Version 7.0
Major I/O processing improvements to reduce software bottlenecks.
New advanced memory cache.
Multi-level storage tiering.
SSD cache support: read cache and persistent read/write cache; Persistent Memory (SCM/Optane) support.
Overall performance improvements and bug fixes.
GUI improvements.

Version 6.0
Added the Storage Pool feature (mentioned above).
Optimized daemon scripts for Linux and the Hyper-Converged Platform.
Improved HA on all platforms.
Improved synchronous and asynchronous replication on Linux and the Hyper-Converged Platform.
Full VMware VAAI support (ATS, offloaded copy, etc.).
GUI improvements and bug fixes (GUI and iSCSI SAN core services).

Version 5.x (5.0–5.5)
Improved performance for concurrent I/O.
Added VHDX disk image support.
Added IPv6 support, including IPv6 IP filtering.
Added MAC address authorization.
Improved virtual write (supports thin-provisioned VHDX image files).
Fixed legacy VHD issues.
GUI improvements for Windows UAC compatibility.
Added AIX iSCSI initiator support.
Improved SMTP notifications (supports more servers).
Improved logging mechanism and log viewer.
Bug fixes (GUI and iSCSI SAN core services).

Version 4.0
Significant optimization across the software.
Major management console changes and improvements.
Software architecture improvements.
Application optimization (HA, replication, etc.).
Added software RAID-5.
Added multiple LUN support.
Added distributed iSCSI SAN (data center) feature.
Fixed existing bugs.

Version 3.x (3.0–3.20)
Improved HA (multiple NICs to prevent split-brain; up to 4 heartbeat channels; improved interface management).
Replication enhancements: sync method, verification method, multi-session synchronization/verification, and fixes for local image async replication.
Added an additional sync link for HA replication.
Added performance statistics.
Saved target portal address order.
Improved automatic snapshots and snapshot-related features.
Added SMTP settings testing.
Added fully automatic upgrade support; fixed upgrade issues from 2.x to 3.0.
Improved free license features and management console GUI.
Bug fixes and license scheme updates.

Version 2.x (2.08–2.95; includes 2.7x internal/OEM)
Improved compatibility with Windows clustering (2012/2008/2003) and XenServer (5.6/6.1).
Added and improved snapshot features, including snapshot replication and improved snapshot management (commit/merge/revert).
Added asynchronous replication and automatic snapshot replication.
Added true real-time continuous data protection (CDP).
Improved performance and utilization of storage/network; improved replication synchronization and re-synchronization.
Added VHD expanding support.
Improved failover mechanism and reduced failover time.
Added multi-server management in a single Management Console.
Added migration support and image file relocation.
Added UDFS support in the virtual DVD emulator.
Added HA data consistency verification, manual synchronization, and SMTP notifications.
Added iSCSI HBA support.
Improved Partition-to-Disk feature (supports reformatting and repartitioning).
Fixed issues related to “Construction Partition Table” and other stability/security bugs.
Numerous Management Console and service/controller bug fixes.

Version 2.00
Major upgrade (see release notes for upgrade details).

Version 1.x (1.10–1.60; includes beta/internal ranges)
Added x64 support.
Added full supp