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--- rb:linuxsan [10/10/2013 14:21]
127.0.0.1 external edit
+++ rb:linuxsan [20/08/2019 12:55]
andrew [Parameters]
@@ Line 1: / Line 1: @@
 ====== SAN Storage ======
+===== HP Storage =====
+See [[rb:sssu-runningonfedora|Running HP sssu on Fedora]]
 ===== Overall Sequence =====
@@ Line 31: / Line 33: @@
+==== RHEL6 ====
+  [root@satellite02 ~]# cat /sys/class/fc_host/host*/port_name
+x500110a00019a1c8
+x500110a00019a1ca
 ===== Multipath info ======
@@ Line 87: / Line 93: @@
+===== Parameters =====
+in /etc/modprobe.conf:-
+  alias scsi_hostadapter1 qla2xxx_conf
+  alias scsi_hostadapter2 qla2xxx
+  options qla2xxx  ql2xmaxqdepth=16 qlport_down_retry=10 ql2xloginretrycount=30
+These settings are more aggressive in failing quickly, this allows multipath to adjust sooner to lost paths.
+  options qla2xxx ql2xfailover=0 ql2xioctltimeout=10 ql2xprocessnotready=0 ql2xloginretrycount=3 ql2xsuspendcount=3 ql2xretrycount=2  lport_down_retry=1
+  options lpfc lpfc_lun_queue_depth=16 lpfc_nodev_tmo=30 lpfc_discovery_threads=32
+in /etc/multipath.conf (for EVA 8400):-
+  defaults {
+  	udev_dir		/dev
+  	polling_interval	10
+  	selector		"round-robin 0"
+  	path_grouping_policy	failover
+  	getuid_callout		"/sbin/scsi_id -g -u -s /block/%n"
+  	prio_callout		"/bin/true"
+  	path_checker		tur
+  	rr_min_io		100
+  	rr_weight       	uniform
+  	failback		immediate
+  	no_path_retry		12
+  	user_friendly_names	yes
+  	bindings_file		"/var/lib/multipath/bindings"
+  }
+  blacklist {
+  	devnode		"^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
+  	devnode 	"^hd[a-z][[0-9]*]"
+  	devnode		"^cciss!c[0-9]d[0-9]*"
+  }
+  devices {
+  device {
+  	vendor			"HP|COMPAQ"
+        	product			"HSV1[01]1 \(C\)COMPAQ|HSV2[01]0|HSV300|HSV4[50]0"
+  	path_grouping_policy	group_by_prio
+          getuid_callout		"/sbin/scsi_id -g -u -s /block/%n"
+          path_checker		tur
+          path_selector		"round-robin 0"
+          prio_callout		"/sbin/mpath_prio_alua /dev/%n"
+          rr_weight		uniform
+          failback		immediate
+  	hardware_handler	"0"
+          no_path_retry		18
+  	rr_min_io		100
+         }
+  }
+  # End device
+  multipaths {
+          multipath {
+          wwid 36001438005def5bf00006000004e0000
+          alias HSV450_FRA_001
+          }
+          multipath {
+          wwid 36001438005def5bf00006000004a0000
+          alias HSV450_arch_001
+          }
+===== USB drives and multipath =====
+No USB drives should be added by multipath. However, multipath can add a USB drive into it's configuration, if it detects a new drive.
+To check if multipath has added a USB drive, it is possible to check by running:
+<file>
+# mount /dev/sda1 /mnt/ext_hdd
+mount: /dev/sda1 already mounted or /mnt/ext_hdd busy
+sudo /sbin/multipath -l
+/dev/sda1: UUID="da85426e-cffc-4d13-8d7f-64549e7ca0ce" SEC_TYPE="ext2" TYPE="ext3"
+HSV450_log01_arch (36001438005dec6e40000500000060000) dm-6 HP,HSV450
+[size=500G][features=1 queue_if_no_path][hwhandler=0][rw]
+\_ round-robin 0 [prio=200][active]
+ \_ 0:0:0:1 sda 8:0   [active][ready]
+ \_ 0:0:1:1 sdb 8:16  [active][ready]
+ \_ 1:0:0:1 sdd 8:48  [active][ready]
+ \_ 1:0:1:1 sde 8:64  [active][ready]
+\_ round-robin 0 [prio=40][enabled]
+ \_ 0:0:2:1 sdc 8:32  [active][ready]
+ \_ 0:0:3:1 sdf 8:80  [active][ready]
+ \_ 1:0:2:1 sdg 8:96  [active][ready]
+ \_ 1:0:3:1 sdh 8:112 [active][ready]
+</file>
+If the USB drive is found in multipath, then the device should be blacklisted in /etc/multipath.conf.
+An example is below:
+<file>
+blacklist {
+        devnode         "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
+        devnode         "^hd[a-z][[0-9]*]"
+        devnode         "^cciss!c[0-9]d[0-9]*"
+        wwid            "da85426e-cffc-4d13-8d7f-64549e7ca0ce"
+}
+</file>
+multipath has to be flushed for the new configuration to take place.  This is done via:
+<file>
+# multipath -F
+# service multipath restart
+</file>
 ====== Re-Scan Fibre devices ======

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rb/linuxsan.txt · Last modified: 20/08/2019 12:58 by andrew