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-rw-r--r--man/man8/zinject.83
1 files changed, 3 insertions, 0 deletions
diff --git a/man/man8/zinject.8 b/man/man8/zinject.8
index 6b6c3733b..c5916e342 100644
--- a/man/man8/zinject.8
+++ b/man/man8/zinject.8
@@ -112,6 +112,9 @@ Specify
.BR "dtl" " for an ECHILD error,"
.BR "io" " for an EIO error where reopening the device will succeed, or"
.BR "nxio" " for an ENXIO error where reopening the device will fail."
+For EIO and ENXIO, the "failed" reads or writes still occur. The probe simply
+sets the error value reported by the I/O pipeline so it appears the read or
+write failed.
.TP
.BI "\-f" " frequency"
Only inject errors a fraction of the time. Expressed as a real number