The final release of SCSI2Pi 5.1 is available for download.

• The INQUIRY product data (vendor, product, revision) for the device type SCSG (e.g. SCSI-to-USB bridge) are configurable, just like they are for other types. The configured data replace the actual data reported by the USB device.
• The sector cache has been optimized.
• s2pdump in case of errors supports retries when saving/restoring hard drive images.

The installation or the update with the binary packages for 32/64 bit bullseye/bookworm is just a matter of seconds.
Note that the PiSCSI web UI only offers limited support for device types it does not know, like tape drives (SCTP) and the SCSI-to-USB bridge (SCSG). s2pctl and the SCSI Control app offer full support.

• There was a minor change in the default logging format.
• A bug in s2pdump related to finding all available LUNs has been fixed.
• A minor bug related to localizing messages has been fixed.

• New device type SCSG, with support for a SCSI-to-USB bridge. The bridge supports any SCSI command, not only those emulated by s2p. You can make use of IDE and SATA devices with USB-to-IDE/SATA adapters. With some drives you can even burn CDs/DVDs, a Performa630 can use USB sticks, and much more.
• s2pexec and s2pdump now also support devices which are managed by the Linux SG driver, e.g. USB/IDE/SATA drives. For these devices no Pi is required, i.e. you can use s2pexec and s2pdump on any Linux platform.
• s2psimh tool for the analysis and creation of SIMH-compatible image files. This tool runs on any Linux/BSD platform and on macOS.
• s2pformat tool for formatting floppy disks or other media, e.g. in USB drives. This tool runs on any Linux platform.
• Extended streamer support, e.g. of SIMH/Open SIMH-compatible tape image files, filemarks, navigation, variable block sizes, ... Operating systems like OpenVMS can be installed from an emulated tape.
• Tape dump/restore support. With s2pdump you can convert any real tape into a SIMH-compatible image file and vice versa.
• s2p can create command scripts for s2pexec. You can record sequences of SCSI commands sent by a driver, e.g. for analyzing problems.
• The maximum number of data bytes to log is configurable.

• s2p requires less main memory, which is especially interesting for small Pis.
• The SCSI command READ FORMAT CAPACITIES has been implemented.
• Various error messages have been improved.

• Support for the new streamer device type SCTP. As image files .tar files are supported, like they are read/written by the tar command line tool. Furthermore, mt/mtx and the streamer software Gemar for the Atari are supported.
• Support of linked SCSI commands according to the SCSI standard.
• Numerous logging and error handling improvements.
• The in-process test tool is now included in the binary packages.

• The SCSI-1 compatibility mode has been improved.
• A minor bug in the s2p parser has been fixed.
• A bug in the s2pexec timeout handling has been fixed.

• s2pctl displays "????" instead of nothing for unknown device types.
• A minor issue when dealing with file operation errors has been fixed.

• A bug when reading CD images has been fixed (ticket #92).

• Code optimizations for the FULLSPEC board.
• The comparatively less performant legacy boards (aibom and gamernium) are no longer supported.
• Code quality improvements.

• Building tailored optimized binaries with a selection of device types has been simplified.
• Various code optimizations.

• The current configuration can be saved as properties in /etc/s2p.conf with s2pctl or the SCSI Control app.
• SCSI and SASI devices can share the bus.
• Logging the bus signals with s2pexec and in_process_test, resp., is now optional.
• The binary sizes have been reduced even more (compared to PiSCSI by about 25%), which is especially important for small Pis (Zero/Zero 2). The less memory is used the more is available for the sector cache.

• Minor bugfixes in the property evaluation/display.

• The automatic creation of the PiSCSI bridge for the DaynaPort emulation can be switched off.
• s2p automatically switches to a matching caching mode if the SCSI commands READ/WRITE LONG are used.
• Numerous optimizations and even more compact binaries.

• Further increased transfer rates, especially with small Pis. With a Pi Zero W the transfer rate is now about 25% higher than before.

• During the installation a configuration file /etc/s2p.conf is created, if not yet present. Edit this file where needed, and subsequently restart the SCSI2Pi system service.
• A bug in the language detection for error messages has been fixed.

• The programs installed with the binary packages or with sudo make install can be launched without sudo.
• The assignment of file extensions to device types is configurable.
• The SCSI level is configurable.
• As sector size any multiple of 4 is supported, which improves the compatibility with exotic platforms.
• The READ/WRITE LONG implementation has been extended and covers more use cases.
• s2p supports various caching modes.
• The DaynaPort emulation supports Wifi also with Bookworm.
• With the "-P" option s2pctl displays the current s2p settings. These can directly be used for a properties file like /etc/s2p.conf, making setting up a default configuration even easier.
• s2pexec supports an interactive mode and offers improved scripting capabilities.
• s2pexec accepts data for the DATA OUT phase on the command line.

• The installation automatically creates a system service for s2p.
• A potential timing issue has been fixed.
• s2pctl now displays a correct error message when setting an invalid default folder location.
• A bug in the printer emulation has been fixed.

• Properties and property-files make configuring s2p more convenient.
• User-defined mode pages improve the compatibility also with exotic platforms.
• BlueSCSI compatibility mode for the names of image files.
• All tools support easier to memorize long command line options.
• s2cptl offers an interactive mode and supports scripting.
• s2pdump can generate information on devices and mode pages for property files.
• s2pdump supports backup/restore of SASI hard drives.
• s2pexec can send any SCSI command, including the command parameters.
• New tool s2pproto for testing the custom SCSI commands of the host services.
• Improved logging.

• There are now installation packages for 32 bit bullseye/bookworm and 64 bit bullseye/bookworm.

• Fixed a bug in the remote interface for clients (e.g. s2pctl, SCSI Control app).

• The DaynaPort emulation uses a dynamic MAC address. This prevents collisions of several DaynaPort emulations in the same network.
• The extensions .cdr and .toast are treated like the .iso extension (for CD-ROM images).
• Further improved compatibility by supporting the mode pages 2, 7, 10 and 12, and by an improved MODE SELECT error handling.
• s2pdump supports an optional start sector and a sector count. Now also parts of a drive can be dumped/restored. See the manpage for details on the new options.