Locate disk in SAS enclosure
After cycling around /sys for a while, I found this solution:
# echo /sys/class/enclosure/*/*/device/block/sdaa /sys/class/enclosure/2:0:35:0/Slot 15/device/block/sdaa # echo 1 > '/sys/class/enclosure/2:0:35:0/Slot 15/locate'
# echo 1 > /sys/class/enclosure/*/*/device/block/sdaa/../../enclosure*/locate
To blink all detected devices:
parallel echo 1 \> ::: /sys/class/enclosure/*/*/device/block/sd*/../../enclosure*/locate
This is useful if you have a drive that is so broken that is not even detected by Linux (e.g. it does not spin up).
I have made a small tool (called blink) to blink slots. https://gitlab.com/ole.tange/tangetools/tree/master/blink
/sys/class/block/sdh links to. You can see the host, target and LUN this way. Usually this is enough to pinpoint the device's hardware address.