The PiSCSI Wiki lists the basic differences between some SCSI emulations. The presumably most important differences between SCSI2Pi and PiSCSI are listed below.
| Feature | SCSI2Pi | PiSCSI | Remark |
|---|---|---|---|
| Installation packages with highly optimized binaries | ✅ | ❌ | SCSI2Pi is installed without compiling in a matter of seconds, the binaries are smaller than with PiSCSI |
| Binary development snapshots | ✅ | ❌ | Also for develop versions installation packages are provided |
| X68000 host bridge | ❌ | ✅ | Removed because of bad code quality and a lack of user interest |
| scsimon and scsiloop tool | ❌ | ✅ | Removed because of bad code quality and dubious usefulness |
| Up to 25% higher transfer rates with considerably smaller binaries |
✅ | ❌ | Measured with a Pi Zero WH (25%) and a Pi 4 (5%) |
| Support for SASI hard drives | ✅ | ❌ | SASI hard drive emulation including backup/restore |
| Improved DaynaPort emulation, improved DaynaPort bridge |
✅ | ❌ | About 16 MB less memory consumption (important for small Pis), support for several DaynaPort emulations in the same network, creation of the DaynaPort bridge can be switched off |
| Properties and property files | ✅ | ❌ | Comfortable configuring of all settings without a command line, default configuration in /etc/s2p.conf |
| BlueSCSI compatiblity mode | ✅ | ❌ | Support of the BlueSCSI filename conventions |
| Configurable caching modes | ✅ | ❌ | A write-through cache, for instance, ensures always consistent image files |
| Configurable and additional mode pages | ✅ | ❌ | Even better driver/platform compatibility by user-defined mode pages |
| Improved initiator mode | ✅ | ❌ | Higher compatibility with the SCSI standard, new and improved tools |
| Scripting support | ✅ | ❌ | s2pctl and s2pexec can execute command scripts |
| Management with SCSI commands | ✅ | ❌ | The connected computer can control SCSI2PI with SCSI commands |
| Improved and extended logging | ✅ | ❌ | Improved error analysis capabilities |
| Optional compilation of device types | ✅ | ❌ | Faster compilation when not all device types are required |
| Tool for sending SCSI or SASI commands | ✅ | ❌ | Sending any command to a device, the results are displayed or saved |
| Tools for advanced testing | ✅ | ❌ | SCSI commands can be tested without Pi hardware on a PC |
| Programs can be launched without sudo | ✅ | ❌ | When installing the binary packages or after sudo make install |
| Additional functions for the SCSI Control App | ✅ | ❌ | SCSI Control since version 5.1 offers additional functions |
The SCSI2Pi news provide information on more new features.
Several partly open for a long time PiSCSI tickets (bugs and requests for enhancement) have been addressed by SCSI2Pi.
| PiSCSI Ticket | Remark |
|---|---|
| 335 | Improved caching, optional write-through cache |
| 479 | Improved support of the SCSI commands READ/WRITE LONG |
| 598 | Dynamic MAC address for the DaynaPort, for more than one DaynaPort in the same network |
| 740 | Installation packages with binaries, installation without compiling |
| 809 | Support for SASI hard drives |
| 1260 | Consistent code formatting and conventions |
| 1331 | DaynaPort bridge for Bookworm |
| 1402, 1410, 1412 | DEC Alpha compatibility, addressing these issues in PiSCSI failed |