The "1.7" version is critical. It represents a maturity point where the developers stopped trying to solve cluster-aware locking and instead focused on one thing: making the block device visible to multiple hosts without crashing the storport.sys stack.
Use it if you understand SCSI reservations, epoch arithmetic, and the exact moment to pull the plug. For everyone else: migrate to a real cluster filesystem (think or Pure Storage FlashArray//C with NVMe/TCP). isharedisk 1.7 windows 10
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\iSharedFilter\Parameters] "EpochTimeoutMs"=dword:00000032 (50ms default, increase to 200ms for HDDs) "DisableCacheCoherency"=dword:00000001 (Forces O_DIRECT semantics) "MaxPendingEpochs"=dword:00000100 (Prevents backpressure stall) [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem] "NtfsDisableLastAccessUpdate"=dword:00000001 "NtfsDisable8dot3NameCreation"=dword:00000001 The "1
Enter . A name that whispers through legacy forums and virtualization communities. Is it a driver? A protocol hack? Or simply an iSCSI target with a marketing wrapper? For everyone else: migrate to a real cluster
But for the tinkerers, the legacy custodians, and the homelab fanatics: iSharedDisk 1.7 on Windows 10 remains a ghost in the machine—barely documented, dangerously effective, and utterly fascinating. Have you recovered data from a corrupted iSharedDisk volume? Let me know in the comments. I’ll send you a hex dump of the epoch header format.
| Metric | Local NTFS | iSharedDisk 1.7 (2 nodes) | iSharedDisk 1.7 (3 nodes) | |--------|------------|---------------------------|---------------------------| | Sequential Write (MB/s) | 2,800 | 1,920 | 1,450 | | Random 4K Write IOPS | 210k | 68k | 41k | | Read Cache Hit Ratio | 94% | 71% | 62% | | Max Volume Size | 256TB | 16TB (tested) | 8TB (stable limit) |