Roman, > WRITE SAME corrupts data on the block device behind iblock if the > command is emulated. The emulation code issues (M - 1) * N times more > bios than requested, where M is the number of 512 blocks per real > block size and N is the NUMBER OF LOGICAL BLOCKS specified in WRITE > SAME command. So, for a device with 4k blocks, 7 * N more LBAs gets > written after the requested range. > > The issue happens because the number of 512 byte sectors to be written > is decreased one by one while the real bios are typically from 1 to 8 > 512 byte sectors per bio. Applied to 5.2/scsi-fixes, thanks! -- Martin K. Petersen Oracle Linux Engineering
