diff options
Diffstat (limited to 'cmd')
| -rwxr-xr-x | cmd/zed/zed.d/statechange-slot_off.sh | 61 | ||||
| -rw-r--r-- | cmd/zed/zed.d/zed.rc | 5 |
2 files changed, 66 insertions, 0 deletions
diff --git a/cmd/zed/zed.d/statechange-slot_off.sh b/cmd/zed/zed.d/statechange-slot_off.sh new file mode 100755 index 000000000..d6f3c94a4 --- /dev/null +++ b/cmd/zed/zed.d/statechange-slot_off.sh @@ -0,0 +1,61 @@ +#!/bin/sh +# +# Turn off disk's enclosure slot if it becomes FAULTED. +# +# Bad SCSI disks can often "disappear and reappear" causing all sorts of chaos +# as they flip between FAULTED and ONLINE. If +# ZED_POWER_OFF_ENCLOUSRE_SLOT_ON_FAULT is set in zed.rc, and the disk gets +# FAULTED, then power down the slot via sysfs: +# +# /sys/class/enclosure/<enclosure>/<slot>/power_status +# +# We assume the user will be responsible for turning the slot back on again. +# +# Note that this script requires that your enclosure be supported by the +# Linux SCSI Enclosure services (SES) driver. The script will do nothing +# if you have no enclosure, or if your enclosure isn't supported. +# +# Exit codes: +# 0: slot successfully powered off +# 1: enclosure not available +# 2: ZED_POWER_OFF_ENCLOUSRE_SLOT_ON_FAULT disabled +# 3: vdev was not FAULTED +# 4: The enclosure sysfs path passed from ZFS does not exist +# 5: Enclosure slot didn't actually turn off after we told it to + +[ -f "${ZED_ZEDLET_DIR}/zed.rc" ] && . "${ZED_ZEDLET_DIR}/zed.rc" +. "${ZED_ZEDLET_DIR}/zed-functions.sh" + +if [ ! -d /sys/class/enclosure ] ; then + # No JBOD enclosure or NVMe slots + exit 1 +fi + +if [ "${ZED_POWER_OFF_ENCLOUSRE_SLOT_ON_FAULT}" != "1" ] ; then + exit 2 +fi + +if [ "$ZEVENT_VDEV_STATE_STR" != "FAULTED" ] ; then + exit 3 +fi + +if [ ! -f "$ZEVENT_VDEV_ENC_SYSFS_PATH/power_status" ] ; then + exit 4 +fi + +echo "off" | tee "$ZEVENT_VDEV_ENC_SYSFS_PATH/power_status" + +# Wait for sysfs for report that the slot is off. It can take ~400ms on some +# enclosures. +for i in $(seq 1 20) ; do + if [ "$(cat $ZEVENT_VDEV_ENC_SYSFS_PATH/power_status)" == "off" ] ; then + break + fi + sleep 0.1 +done + +if [ "$(cat $ZEVENT_VDEV_ENC_SYSFS_PATH/power_status)" != "off" ] ; then + exit 5 +fi + +zed_log_msg "powered down slot $ZEVENT_VDEV_ENC_SYSFS_PATH for $ZEVENT_VDEV_PATH" diff --git a/cmd/zed/zed.d/zed.rc b/cmd/zed/zed.d/zed.rc index c55a70c79..78dc1afc7 100644 --- a/cmd/zed/zed.d/zed.rc +++ b/cmd/zed/zed.d/zed.rc @@ -142,3 +142,8 @@ ZED_SYSLOG_SUBCLASS_EXCLUDE="history_event" # Disabled by default, 1 to enable and 0 to disable. #ZED_SYSLOG_DISPLAY_GUIDS=1 +## +# Power off the drive's slot in the enclosure if it becomes FAULTED. This can +# help silence misbehaving drives. This assumes your drive enclosure fully +# supports slot power control via sysfs. +#ZED_POWER_OFF_ENCLOUSRE_SLOT_ON_FAULT=1 |