Benjamin, > # lsblk -D /dev/sda /dev/sde > NAME DISC-ALN DISC-GRAN DISC-MAX DISC-ZERO > sda 0 1G 4G 0 > └─mpathc 0 1G 4G 0 > └─mpathc1 0 1G 4G 0 > sde 0 1G 4G 0 > └─mpathc 0 1G 4G 0 > └─mpathc1 0 1G 4G 0 > # lsblk -S /dev/sda /dev/sde > NAME HCTL TYPE VENDOR MODEL REV SERIAL TRAN > sda 0:0:0:1079787648 disk IBM 2107900 1060 75DL241805C fc > sde 1:0:0:1079787648 disk IBM 2107900 1060 75DL241805C fc > > Any idea why this is happening? In case you need more details, this > reproduces very reliably here. Are the reported discard limits different on kernels predating that commit? Please send the output of: # grep . /sys/block/sdN/queue/discard_* /sys/block/sdN/device/scsi_disk/*/*_mode # sg_readcap -l /dev/sdN # sg_vpg -p bl /dev/sdN # sg_vpg -p lbpv /dev/sdN Ideally (for the grep) before and after the offending commit. Thanks! -- Martin K. Petersen Oracle Linux Engineering