The default value for the
timeout file for SCSI disks is 30, supposedly meaning 30s. In my
dmesg logs, I find that the system is waiting 180s before timing out. Setting
timeout to various values reveals that is waiting by a multiple of six (i.e.
timeout * 6 seconds).
Why is this happening?
(The disk access is happening through much indirection - a
linear dmsetup partition on top of a
snapshot table accessing a
loop backed by a file on a
fuse mount that is accessing the actual disk. Does this make a difference?)