Differences

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--- en:services:storage_services:backup:tsm:admin:fc_stuff [2020/01/07 16:14] – [using systool] bnachtw
+++ en:services:storage_services:backup:tsm:admin:fc_stuff [2023/02/03 08:39] – [Rescaning the SCSI bus] bnachtw
@@ Line 1: / Line 1: @@
+====== some useful commands around fibre channel ======
+===== WWN & Co =====
+==== get the wwn from the adapers ====
+=== SLES ===
+<code>
+# for i in $(ls -d /sys/class/scsi_host/host*/device/fc_host/host*/port_name); do echo $i $(cat $i);done
+</code>
+e.g.
+<code>
+# for i in $(ls -d /sys/class/scsi_host/host*/device/fc_host/host*/port_name); do echo $i $(cat $i);done
+/sys/class/scsi_host/host15/device/fc_host/host15/port_name 0x2100f4e9d455702c
+/sys/class/scsi_host/host16/device/fc_host/host16/port_name 0x2100f4e9d455702d
+/sys/class/scsi_host/host17/device/fc_host/host17/port_name 0x2100f4e9d45573c8
+/sys/class/scsi_host/host18/device/fc_host/host18/port_name 0x2100f4e9d45573c9
+</code>
+=== using systool ===
+according to [[https://www.thegeekdiary.com/how-to-identify-the-hba-cardsports-and-wwn-in-rheloel/| The Geek Diary]]
+  * To check the available HBA ports :
+<code>
+# systool -c fc_host
+Class = "fc_host"
+  Class Device = "host2"
+    Device = "host2"
+  Class Device = "host3"
+    Device = "host3"
+</code>
+  * To find the WWNs for the HBA ports :
+<code>
+# systool -c fc_host -v | grep port_name
+    port_name           = "0x500143802426baf4"
+    port_name           = "0x500143802426baf6"
+</code>
+  * To check the state of the HBA ports (online/offline) :
+<code>
+# systool -c fc_host -v | grep port_state
+    port_state          = "Online"
+    port_state          = "Online"
+</code>
+===== multipathing =====
+==== paths & devices ====
+==== multipathd commands ====
+multipathd is not only the the multipath daemon itself, but also a useful command for analysing the SAN:
+<code>
+# multipathd --help
+</code>
+FIXME
+===== Rescaning the SCSI bus =====
+ordinarily you just use the ''rescan-scsi.sh'' command.
+thus, this only reads the configuration again, but does not reinitialize the HBA.
+this can be done by:
+<code>
+# echo "1" > /sys/class/fc_host/host<X>/issue_lip
+</code>
+replacing '<X'>  with the number of the HBA.
+==== manual switch off/on of HBA ====
+thanks to [[https://www.veritas.com/support/en_US/article.100050716|Veritas]]