On Wed, Jul 29, 2020 at 10:44:26AM -0400, Martin K. Petersen wrote: > > Alan, > > >> [ 77.474632] sd 0:0:0:0: [sda] tag#0 UNKNOWN(0x2003) Result: > >> hostbyte=0x00 driverbyte=0x08 cmd_age=0s > >> [ 77.474647] sd 0:0:0:0: [sda] tag#0 Sense Key : 0x6 [current] > >> [ 77.474655] sd 0:0:0:0: [sda] tag#0 ASC=0x28 ASCQ=0x0 > >> [ 77.474667] sd 0:0:0:0: [sda] tag#0 CDB: opcode=0x28 28 00 00 00 60 > >> 40 00 00 01 00 > > > > This error report comes from the SCSI layer, not the block layer. > > This the device telling us that the media (SD card?) has changed. Ah yes, thank you. I knew that SK=6 ASC=0x28 meant "Not Ready to Ready Transition", but I had forgotten the "(Media May Have Changed)" part. This makes sense and is a reasonable thing to see, since many SD card readers lose track of whether or not the card has been changed when they go into suspend. Alan Stern
