fio io_uring engine while verify pi data

[huangyu96]

while pi type=1 and don’t check ref tag.I see cdw14 Expected Initial Logical Block Reference Tag (EILBRT) field is not assigned a value.

$fio command
./fio -filename=/dev/ng0n1 -ioengine=io_uring_cmd -rw=read -bs=520 -iodepth=32 -offset=0 -size=1k -cmd_type=nvme -pi_act=0x0 -pi_chk=GUARD,APPTAG, -apptag=0x0888 -apptag_mask=0xFFFF -thread=1 -stonewall=1 -name=verifyame=verify

$ fio --version
fio-3.38

$uname -r
6.8.0-45-generic

[vincentkfu]

Not sure what the question is here.

If the RTCHK bit in PRCHK is not set then the reference tag is not checked by the controller. Why would fio set EILBRT if the value is not checked?

[huangyu96]

here,when pi type=1,ref tag should equal to start lba，otherwise the controller shall complete the command with a status of Invalid Protection Information if the ILBRT field or the EILBRT field does not match the least significant four bytes of the SLBA field. @vincentkfu

[vincentkfu]

The section in your screenshot begins with:

If bit 0 of the PRCHK field is set to '1'

This is not the case for your job as reference tag checking is disabled.

Why would the controller return a reference tag error if reftag checking is disabled?