1#!/bin/sh 2# shellcheck disable=SC3014,SC2154,SC2086,SC2034 3# 4# Turn off disk's enclosure slot if it becomes FAULTED. 5# 6# Bad SCSI disks can often "disappear and reappear" causing all sorts of chaos 7# as they flip between FAULTED and ONLINE. If 8# ZED_POWER_OFF_ENCLOSURE_SLOT_ON_FAULT is set in zed.rc, and the disk gets 9# FAULTED, then power down the slot via sysfs: 10# 11# /sys/class/enclosure/<enclosure>/<slot>/power_status 12# 13# We assume the user will be responsible for turning the slot back on again. 14# 15# Note that this script requires that your enclosure be supported by the 16# Linux SCSI Enclosure services (SES) driver. The script will do nothing 17# if you have no enclosure, or if your enclosure isn't supported. 18# 19# Exit codes: 20# 0: slot successfully powered off 21# 1: enclosure not available 22# 2: ZED_POWER_OFF_ENCLOSURE_SLOT_ON_FAULT disabled 23# 3: vdev was not FAULTED 24# 4: The enclosure sysfs path passed from ZFS does not exist 25# 5: Enclosure slot didn't actually turn off after we told it to 26 27[ -f "${ZED_ZEDLET_DIR}/zed.rc" ] && . "${ZED_ZEDLET_DIR}/zed.rc" 28. "${ZED_ZEDLET_DIR}/zed-functions.sh" 29 30if [ ! -d /sys/class/enclosure ] ; then 31 # No JBOD enclosure or NVMe slots 32 exit 1 33fi 34 35if [ "${ZED_POWER_OFF_ENCLOSURE_SLOT_ON_FAULT}" != "1" ] ; then 36 exit 2 37fi 38 39if [ "$ZEVENT_VDEV_STATE_STR" != "FAULTED" ] ; then 40 exit 3 41fi 42 43if [ ! -f "$ZEVENT_VDEV_ENC_SYSFS_PATH/power_status" ] ; then 44 exit 4 45fi 46 47# Turn off the slot and wait for sysfs to report that the slot is off. 48# It can take ~400ms on some enclosures and multiple retries may be needed. 49for i in $(seq 1 20) ; do 50 echo "off" | tee "$ZEVENT_VDEV_ENC_SYSFS_PATH/power_status" 51 52 for j in $(seq 1 5) ; do 53 if [ "$(cat $ZEVENT_VDEV_ENC_SYSFS_PATH/power_status)" == "off" ] ; then 54 break 2 55 fi 56 sleep 0.1 57 done 58done 59 60if [ "$(cat $ZEVENT_VDEV_ENC_SYSFS_PATH/power_status)" != "off" ] ; then 61 exit 5 62fi 63 64zed_log_msg "powered down slot $ZEVENT_VDEV_ENC_SYSFS_PATH for $ZEVENT_VDEV_PATH" 65