On Mon, 12 Nov 2018, Zengtao (B) wrote: > >> >Something is wrong here. Before sending PREVENT-ALLOW MEDIUM > >> >REMOVAL, the host should issue SYNCHRONIZE CACHE. This will force > >> >fsg_lun_fsync_sub to run, and the host should allow a long timeout > >> >for this command. Then when PREVENT-ALLOW MEDIUM REMOVAL > >is sent, > >> >nothing will need to be flushed. > >> > > >> > >> Definitely, I haven't seen the SYNCHRONIZE CACHE from the host, it > >> directly issued the PREVENT-ALLOW MEDIUM REMOVAL, so maybe > >something > >> wrong with the scsi layer or something wrong with the mass storage > >class driver? > > > >Or it could be something else. Can you please post the dmesg log from > >the host, showing what happens when the device is first plugged in? > > > > I have enabled the SCSI log for the host, please refer to the attachment. The log you attached was incomplete -- it was missing some commands from the beginning. In any case, it wasn't what I wanted. I asked you to post the dmesg log, not the SCSI log. Alan Stern
