Chris, > [ 195.647081] sd 0:0:0:0: [sda] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s > [ 195.647093] sd 0:0:0:0: [sda] tag#0 Sense Key : Illegal Request [current] > [ 195.647096] sd 0:0:0:0: [sda] tag#0 Add. Sense: Invalid command operation code > [ 195.647099] sd 0:0:0:0: [sda] tag#0 CDB: Write same(16) 93 08 00 00 00 00 04 dd 42 f8 00 00 2d 48 00 00 > [ 195.647101] critical target error, dev sda, sector 81609464 op 0x3:(DISCARD) flags 0x800 phys_seg 1 prio class 0 I would appreciate if you could test the following patch. Thanks! -- Martin K. Petersen Oracle Linux Engineering