Why is `ioerr_cnt` rising, without showing any messages in the log?
I'm struggling a bit to work out what process does this.
sudo lsof +D /dev/doesn't seem to show any processes with a SCSI device currently open, but I don't see any relevant open() calls at the time of the errors either (cd /dev && sudo fatrace -c)…[Answer:] udisks polls drives every ten minutes e.g. for SMART data.
$ ps -ax|grep udisksd 810 ? Ssl 0:13 /usr/libexec/udisks2/udisksd $ sudo strace -t -f -p 810 [pid 810] 14:11:09 clone(strace: Process 26543 attached child_stack=0x7f8fc551ddf0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tidptr=0x7f8fc551e9d0, tls=0x7f8fc551e700, child_tidptr=0x7f8fc551e9d0) = 26543 [pid 26543] 14:11:09 set_robust_list(0x7f8fc551e9e0, 24 <unfinished ...> [pid 810] 14:11:09 poll([{fd=4, events=POLLIN}, {fd=8, events=0}, {fd=9, events=0}, {fd=11, events=POLLIN}, {fd=13, events=POLLIN}], 5, 599968 <unfinished ...> [pid 26543] 14:11:09 <... set_robust_list resumed> ) = 0 [pid 26543] 14:11:09 prctl(PR_SET_NAME, "pool") = 0 [pid 26543] 14:11:09 openat(AT_FDCWD, "/dev/sda", O_RDONLY|O_NONBLOCK) = 14 [pid 26543] 14:11:09 ioctl(14, SG_IO, {guard='Q', protocol=BSG_PROTOCOL_SCSI, subprotocol=BSG_SUB_PROTOCOL_SCSI_CMD, ...I don't know why
fatracedid not seem to show this device being opened by udisks. It managed to show other device opens (like when I ran lsof, or when I started firefox and it opened /dev/dri/card0).
^ Does anybody know?
Best Answer
It seems that
fatracedoes not show any device opens. You can use it to see processes opening directories under/dev, like/dev/dri, but not device nodes like/dev/dri/card0.