Index: head/sys/dev/hyperv/storvsc/hv_storvsc_drv_freebsd.c =================================================================== --- head/sys/dev/hyperv/storvsc/hv_storvsc_drv_freebsd.c +++ head/sys/dev/hyperv/storvsc/hv_storvsc_drv_freebsd.c @@ -2278,7 +2278,11 @@ } ccb->csio.scsi_status = (vm_srb->scsi_status & 0xFF); - ccb->csio.resid = ccb->csio.dxfer_len - vm_srb->transfer_len; + if (srb_status == SRB_STATUS_SUCCESS || + srb_status == SRB_STATUS_DATA_OVERRUN) + ccb->csio.resid = ccb->csio.dxfer_len - vm_srb->transfer_len; + else + ccb->csio.resid = ccb->csio.dxfer_len; if (reqp->sense_info_len != 0) { csio->sense_resid = csio->sense_len - reqp->sense_info_len; Index: head/sys/dev/hyperv/storvsc/hv_vstorage.h =================================================================== --- head/sys/dev/hyperv/storvsc/hv_vstorage.h +++ head/sys/dev/hyperv/storvsc/hv_vstorage.h @@ -245,7 +245,8 @@ #define SRB_STATUS_SUCCESS 0x01 #define SRB_STATUS_ABORTED 0x02 #define SRB_STATUS_ERROR 0x04 -#define SRB_STATUS_INVALID_LUN 0x20 +#define SRB_STATUS_DATA_OVERRUN 0x12 +#define SRB_STATUS_INVALID_LUN 0x20 /** * SRB Status Masks (can be combined with above status codes) */