Script for Setting Perennial Reservations on RDM luns

RDM's must have the perennial reservation flag set to true.

Unfortunately the four bits of info (perennial reservations setting, NAA ID, LUN_ID and Data Store Name, aren't all available from one command, so you need to do a little work.

NAAID and Perennial Reservation status:

ssh to host and run:

# esxcli storage core device list > /tmp/esxcli_reservations_naaID.txt

where you'll see the NAA id and Perennially Reserved status for all luns on that host:

naa.60060160b1b02d00559a83248cc0e311
   Display Name: DGC Fibre Channel Disk (naa.60060160b1b02d00559a83248cc0e311)
   Has Settable Display Name: false
   Size: 122880
   Device Type: Direct-Access
   Multipath Plugin: PowerPath
   Devfs Path: /vmfs/devices/disks/naa.60060160b1b02d00559a83248cc0e311
   Vendor: DGC
   Model: VRAID
   Revision: 0532
   SCSI Level: 4
   Is Pseudo: false
   Status: on
   Is RDM Capable: true
   Is Local: false
   Is Removable: false
   Is SSD: false
   Is Offline: false
   Is Perennially Reserved: false
   Queue Full Sample Size: 0
   Queue Full Threshold: 0
   Thin Provisioning Status: yes
   Attached Filters: VAAI_FILTER
   VAAI Status: supported
   Other UIDs: vml.020003000060060160b1b02d00559a83248cc0e311565241494420
   Is Local SAS Device: false
   Is Boot USB Device: false

LUN_ID and NAAID

# esxcli storage core device list | grep -C12 "Reserved: false" | grep "Path: /vmfs/devices" | cut -d. -f2 | tee /tmp/NAA_perennial_false.txt
to get the list of NAA ids of luns without perennial reservation set.

List all LUN numbers:
~ # esxcfg-mpath -l | grep "LUN:" | cut -d: -f4,5 | awk '{print $2,$3}' | sort -
u | sort -n -k2
LUN: 0
LUN: 1
LUN: 2
LUN: 3
LUN: 8
LUN: 9
LUN: 10
LUN: 11
LUN: 12
LUN: 13
LUN: 14
LUN: 15
LUN: 42
LUN: 132
LUN: 149
LUN: 151
LUN: 198
LUN: 200
LUN: 201
LUN: 202
LUN: 203
LUN: 204

NAAid and Data Store name

But most of these are VMFS datastores, which are set correctly when they have perennial reservation as false (default is correct, so don't change):

~ # esxcfg-scsidevs -m | awk '{print $1,$5}' > /tmp/esxcfg-scsidevs-m-naaID_DataStore.txt

naa.6000144000000010a0245b40d0472b3a:1 SAN_DS1
~ #

You can manually verify the RDMs and build the command below to change from False to True on RDMs:

esxcli storage core device setconfig -d naa.id --perennially-reserved=true

for example:

# esxcli storage core device setconfig -d naa.6000144000000010a0245b40d047369b --perennially-reserved=true

# esxcli storage core device setconfig -d naa.6000144000000010a0245b40d047369e --perennially-reserved=true

Or just run this script to build the commands for you:
_____________________________________________________________________________
esxcfg-scsidevs -m > /tmp/esxcfg-scsidevs-m-naaID_DataStore.txt
esxcli storage core device list | grep -C12 "Reserved: false" | \
grep "Path: /vmfs/devices" | cut -d. -f2 | while read naaID ; do
#echo "checking ${naaID} for datastore" ;
grep ${naaID} /tmp/esxcfg-scsidevs-m-naaID_DataStore.txt >/dev/null
RC=$?
if [ ${RC} != 0 ] ; then
echo -n "${naaID} does not have datastore, assuming RDM, "
echo "which needs perennial reservation set with command shown:"
echo
echo -n "esxcli storage core device setconfig -d "
echo "naa.${naaID} --perennially-reserved=true"
echo
echo
else
DataStore=`grep ${naaID} /tmp/esxcfg-scsidevs-m-naaID_DataStore.txt |\
awk '{print $1,$5}' | awk '{print $2}'`
echo -n "NAAID ${naaID} has datastore ${DataStore}, so does not need "
echo "perennial reservation changed"
fi
done
__________________________________________________________________________

Example run of script follows:

60060160b1b02d00559a83248cc0e311 does not have datastore, assuming RDM, which needs perennial reservation set with command shown:

esxcli storage core device setconfig -d  naa.60060160b1b02d00559a83248cc0e311 --perennially-reserved=true

NAAID 6000144000000010a0245b40d047339f has datastore SAN_DS1, so does not need perennial reservation changed

References:
http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1016106