## Rules to add in /etc/udev/rules.d/99-Tegile-Disk-Timeout.rules

## RHEL6.8
ACTION=="add", BUS=="scsi", SYSFS{vendor}=="TEGILE  " , SYSFS{model}=="INTELLIFLASH    ", RUN+="/bin/sh -c 'echo 128 >/sys$DEVPATH/queue/max_sectors_kb'"

##RHEL7
ACTION=="add", KERNEL=="sd*", SUBSYSTEM=="block", ATTRS{model}=="INTELLIFLASH    ", ATTRS{vendor}=="TEGILE  ", RUN="/usr/bin/sh -c 'echo 10 > /sys$devpath/device/timeout'"

## NOOP Configuration for iSCSI

Edit the /etc/iscsi/iscsid.conf

Add the following:

node.conn[0].timeo.noop_out_interval = 0
node.conn[0].timeo.noop_out_timeout = 0

#Add a dynamic iSCSI Target:
#iscsiadm -m discovery -t st -p 192.168.2.180

#Login to each target IP:
#iscsiadm -m node -T iqn.2012-02.com.tegile:tegile01-pool-a -p 192.168.2.180 -l

#Rescan FC HBA:
#echo "1" > /sys/class/fc_host/hostXX/issue_lip

or, you can script it with:

for hba in `ls -d /sys/class/fc_host/host*`; do echo "1" > "$hba/issue_lip";done

#Rescan iSCSI Target (Sometimes you also need to rescan the SCSI BUS)

iscsiadm -m session --rescan

#Rescan the SCSI BUS (Should only be needed for iSCSI and is not always needed.)

echo "- - -" > /sys/class/scsi_host/hostXXX/scan
for iscsiinit in `ls -d /sys/class/scsi_host/host*`; do for iscsionly in `cat "$iscsiinit/proc_name"`;do if [ $iscsionly == 'iscsi_tcp' ];then echo "Rescanning: $iscsiinit/scan";echo "- - -" > $iscsiinit/scan;fi;done;done

#Update Dev-Mapper:

multipath -v3

#Then to view devices and paths:

multipath -ll

# Update udev rules without a reboot:

udevadm control --reload-rules && udevadm trigger

# Test a specific device:

udevadm test /sys/devices..../dm-0

# Device Mapper Requirements for Boot From SAN

Update device mapper version to 0.4.9-99.el7_3.3.x86_64 (refer https://access.redhat.com/errata/RHEA-2017:1300.html)

# FC BFS - Rebuild initramfs:

cp -av /boot/initramfs-$(uname -r).img /boot/initramfs-$(uname -r).img.bak
dracut -f -v -a multipath --include /etc/multipath /etc/multipath
reboot