> -----Original Message----- > From: fio-owner@xxxxxxxxxxxxxxx [mailto:fio-owner@xxxxxxxxxxxxxxx] On Behalf Of smitha sunder > Sent: Tuesday, October 15, 2019 4:37 PM > To: fio <fio@xxxxxxxxxxxxxxx> > Subject: unaligned IO and starting LBA > > Hello, > > > > I have a 512 byte formatted nvme drive and I want to send an unaligned > IO and here’s the fio command line I am using , fio version fio-3.7 > > # fio --name=job1 --filename=/dev/nvme0n1 --rw=randwrite > --ioengine=libaio --number_ios=1 --debug=io --bs_unaligned=1 > --bs=1029 ... > Shouldn’t I see D7BD7CE as the starting LBA for the write based on the > above offset (0x1af7af9cec) ? Without direct=1 you're exercising the OS page cache logic, not directly accessing the drive.
