Hi List, Interested in SCSI tests? I have a reasonable SCSI (mainly SBC) testsuite at https://github.com/sahlberg/libiscsi while I am mainly interested in testing of iSCSI targets, most of my tests so far are for the SCSI protocol so they work quite well on devices connected to any kind of transport, as long as you re-export them via iSCSI. (For example using a simple passthrough device with TGT.) At some stage I will redo some of the framework so that it can optionally talk directly to a /dev/sg* device, but reexporting via TGT works well enough for now. The test suite is fairly comprehensive for SBC so far, you can find a list of all the current tests at https://sites.google.com/site/libiscsitarballs/libiscsitarballs/ Based on hearing about the problems with USB devices, I added a special family with the tests I think would be relevant to USB SBC devices. Oh boy, I thought soft iSCSI targets were bad... USB seems like a completely new level of badness. In testing some random sticks I had I found no usb stick actually claiming SBC support in the standard inq page, but one stick claimed support for SSC ! Another stick never really reported LBA OUT OF RANGE and it just kept wrapping the LBA once you wrote beyond the end of the stick. I.e. write at LBA modulo size-of-stick. Another one didnt supported VERIFY10 with bytchk set (whats the point supporting VERIFY10 at all then?), and if you sent too many VERIFY10 to it it would lock up completely. Wow. And I thought iSCSI targets were bad. I added changes to the tests so that IF a device claims SBC-3 support then both READCAPACITY16 and READ16 are mandatory so the tests will fail if the commands are missing. If SBC-3 is not claimed, I allow these commands to fail and just skip that particular test. To get an overview of what it tests so far for SCSI-USB-SBC I have pasted the output of ./bin/iscsi-test-cu iscsi://127.0.0.1/iqn.ronnie.test/3 --dataloss -V --usb --test SCSI-USB-SBC also at https://sites.google.com/site/libiscsitarballs/libiscsitarballs/ I think this could be very useful for testing USB devices and maybe if you can get vendors to test their devices before release ? I am very happy to add more tests for specific pain point you have with devices but since I have little experience with USB devices I would need your help to identify what I should add tests for. So to sum it up: * please have a look at the tests and the test results I linked to above. I currently have quite a few tests but am happy to add more. * do you think this is something you guys could find useful ? * then if so, do you want to work with me to improve it so it tests and flags the problem areas you find with usb (and other) devices ? regards ronnie sahlberg -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
