RHEL: Checking HBAs

# Tested on RHEL 6


# Show the instances of FC ports connected to the pci bus:

lspci | grep -i "Fibre"
   07:00.0 Fibre Channel: QLogic Corp. ISP2532-based 8Gb Fibre Channel to PCI Express HBA (rev 02)
   07:00.1 Fibre Channel: QLogic Corp. ISP2532-based 8Gb Fibre Channel to PCI Express HBA (rev 02)



systool -c fc_host
   Class = "fc_host"

     Class Device = "host1"
       Device = "host1"

     Class Device = "host2"
       Device = "host2"


# "systool -c fc_host" command in verbose mode shows the WWN of our HBAs (port_name).
# In the example below, the WWNs of our HBAs are '5001438028cb8124' & '5001438028cb8126'
# respectively

systool -c fc_host -v
   Class = "fc_host"

     Class Device = "host1"
     Class Device path = "/sys/devices/pci0000:00/0000:00:03.0/0000:04:00.0/host1/fc_host/host1"
       dev_loss_tmo        = "16"
       fabric_name         = "0x10000005339ade00"
       issue_lip           = <store method only>
       max_npiv_vports     = "254"
       node_name           = "0x5001438028cb8125"
       npiv_vports_inuse   = "0"
       port_id             = "0x1aab00"
       port_name           = "0x5001438028cb8124"
       port_state          = "Online"
       port_type           = "NPort (fabric via point-to-point)"
       speed               = "8 Gbit"
       supported_classes   = "Class 3"
       supported_speeds    = "1 Gbit, 2 Gbit, 4 Gbit, 8 Gbit"
       symbolic_name       = "HPAJ764A FW:v7.00.01 DVR:v8.05.00.03.06.5-k2"
       system_hostname     = ""
       tgtid_bind_type     = "wwpn (World Wide Port Name)"
       uevent              =
       vport_create        = <store method only>
       vport_delete        = <store method only>

       Device = "host1"
       Device path = "/sys/devices/pci0000:00/0000:00:03.0/0000:04:00.0/host1"
         fw_dump             =
         nvram               = "ISP "
         optrom              =
         optrom_ctl          = <store method only>
         reset               = <store method only>
         sfp                 = ""
         uevent              = "DEVTYPE=scsi_host"
         vpd                 = "$"


     Class Device = "host2"
     Class Device path = "/sys/devices/pci0000:00/0000:00:03.0/0000:04:00.1/host2/fc_host/host2"
       dev_loss_tmo        = "16"
       fabric_name         = "0x10000005339ac200"
       issue_lip           = <store method only>
       max_npiv_vports     = "254"
       node_name           = "0x5001438028cb8127"
       npiv_vports_inuse   = "0"
       port_id             = "0x20ab00"
       port_name           = "0x5001438028cb8126"
       port_state          = "Online"
       port_type           = "NPort (fabric via point-to-point)"
       speed               = "8 Gbit"
[...]




# For each FC initiator port should have an instance under /sys/class/fc_host

ll /sys/class/fc_host/
   total 0
   lrwxrwxrwx 1 root root 0 Mar 25 11:53 host1 -> ../../devices/pci0000:00/0000:00:03.0/0000:04:00.0/host1/fc_host/host1
   lrwxrwxrwx 1 root root 0 Mar 25 11:53 host2 -> ../../devices/pci0000:00/0000:00:03.0/0000:04:00.1/host2/fc_host/host2


# If FC have never been scanned before, LUNs are not yet visible to the system and commands
# like "multipath" or "systool" won't be able to show the LUNs


ll /sys/class/fc_transport/
   total 0

systool -c fc_transport -v
   Class = "fc_transport"


# Let's see what happens after scanning the FC. Based on the FC instances found before:

echo "- - -" >> /sys/class/scsi_host/host1/scan
echo "- - -" >> /sys/class/scsi_host/host2/scan


ll /sys/class/fc_transport/
   total 0
   lrwxrwxrwx 1 root root 0 Apr  3 10:27 target1:0:0 -> ../../devices/pci0000:00/0000:00:03.0/0000:04:00.0/host1/rport-1:0-0/target1:0:0/fc_transport/target1:0:0
   lrwxrwxrwx 1 root root 0 Apr  3 10:27 target1:0:1 -> ../../devices/pci0000:00/0000:00:03.0/0000:04:00.0/host1/rport-1:0-1/target1:0:1/fc_transport/target1:0:1
   lrwxrwxrwx 1 root root 0 Apr  3 10:27 target2:0:0 -> ../../devices/pci0000:00/0000:00:03.0/0000:04:00.1/host2/rport-2:0-0/target2:0:0/fc_transport/target2:0:0
   lrwxrwxrwx 1 root root 0 Apr  3 10:27 target2:0:1 -> ../../devices/pci0000:00/0000:00:03.0/0000:04:00.1/host2/rport-2:0-1/target2:0:1/fc_transport/target2:0:1


systool -c fc_transport
   Class = "fc_transport"

     Class Device = "0:0"
       Device = "target1:0:0"

     Class Device = "0:0"
       Device = "target2:0:0"

     Class Device = "0:1"
       Device = "target1:0:1"

     Class Device = "0:1"
       Device = "target2:0:1"



# Now, we are also able to see the LUNs attached to the server (if any) via "multipath"

multipath -ll
   200255c3a1108000e dm-2 NEC,DISK ARRAY
   size=15G features='0' hwhandler='1 alua' wp=rw
   |-+- policy='round-robin 0' prio=130 status=active
   | |- 1:0:0:0 sdc 8:32  active ready running
   | `- 2:0:1:0 sdi 8:128 active ready running
   `-+- policy='round-robin 0' prio=10 status=enabled
     |- 2:0:0:0 sdg 8:96  active ready running
     `- 1:0:1:0 sde 8:64  active ready running
   200255c3a1108000f dm-3 NEC,DISK ARRAY
   size=160G features='0' hwhandler='1 alua' wp=rw
   |-+- policy='round-robin 0' prio=130 status=active
   | |- 1:0:1:1 sdf 8:80  active ready running
   | `- 2:0:0:1 sdh 8:112 active ready running
   `-+- policy='round-robin 0' prio=10 status=enabled
     |- 1:0:0:1 sdd 8:48  active ready running
     `- 2:0:1:1 sdj 8:144 active ready running




# "systool -c fc_transport" command in verbose mode can give some interesting information
# like the WWNN of the ports of the Fibre Channel storage servers (port_name)

systool -c fc_transport -v
   Class = "fc_transport"

     Class Device = "0:0"
     Class Device path = "/sys/devices/pci0000:00/0000:00:03.0/0000:04:00.0/host1/rport-1:0-0/target1:0:0/fc_transport/target1:0:0"
       node_name           = "0x200000255c3a1108"
       port_id             = "0x031500"
       port_name           = "0x220000255c3a1108"
       uevent              =

       Device = "target1:0:0"
       Device path = "/sys/devices/pci0000:00/0000:00:03.0/0000:04:00.0/host1/rport-1:0-0/target1:0:0"
         uevent              = "DEVTYPE=scsi_target"


     Class Device = "0:0"
     Class Device path = "/sys/devices/pci0000:00/0000:00:03.0/0000:04:00.1/host2/rport-2:0-0/target2:0:0/fc_transport/target2:0:0"
       node_name           = "0x200000255c3a1108"
       port_id             = "0x1fdb00"
       port_name           = "0x2f0000255c3a1108"
       uevent              =

       Device = "target2:0:0"
       Device path = "/sys/devices/pci0000:00/0000:00:03.0/0000:04:00.1/host2/rport-2:0-0/target2:0:0"
         uevent              = "DEVTYPE=scsi_target"


     Class Device = "0:1"
     Class Device path = "/sys/devices/pci0000:00/0000:00:03.0/0000:04:00.0/host1/rport-1:0-1/target1:0:1/fc_transport/target1:0:1"
       node_name           = "0x200000255c3a1108"
       port_id             = "0x032600"
       port_name           = "0x2a0000255c3a1108"
       uevent              =

[...]




# To look at information regarding the SCSI adapters present ('-v' for verbose):

systool -c scsi_host
   Class = "scsi_host"

     Class Device = "host0"
       Device = "host0"

     Class Device = "host1"
       Device = "host1"

     Class Device = "host2"
       Device = "host2"

     Class Device = "host3"
       Device = "host3"

     Class Device = "host4"
       Device = "host4"



# To see what Fibre Channel devices are connected to the Fibre Channel HBA cards:

systool -c fc_remote_ports -d
   Class = "fc_remote_ports"

     Class Device = "0-0"
       Device = "rport-1:0-0"

     Class Device = "0-0"
       Device = "rport-2:0-0"

     Class Device = "0-1"
       Device = "rport-1:0-1"

     Class Device = "0-1"
       Device = "rport-2:0-1"


systool -c fc_remote_ports -v -d
   Class = "fc_remote_ports"

     Class Device = "0-0"
     Class Device path = "/sys/devices/pci0000:00/0000:00:03.0/0000:04:00.0/host1/rport-1:0-0/fc_remote_ports/rport-1:0-0"
       dev_loss_tmo        = "864000"
       fast_io_fail_tmo    = "5"
       node_name           = "0x200000255c3a1108"
       port_id             = "0x031500"
       port_name           = "0x220000255c3a1108"
       port_state          = "Online"
       roles               = "FCP Target"
       scsi_target_id      = "0"
       supported_classes   = "Class 3"
       uevent              =


     Class Device = "0-0"
     Class Device path = "/sys/devices/pci0000:00/0000:00:03.0/0000:04:00.1/host2/rport-2:0-0/fc_remote_ports/rport-2:0-0"
       dev_loss_tmo        = "864000"
       fast_io_fail_tmo    = "5"
       node_name           = "0x200000255c3a1108"
       port_id             = "0x1fdb00"
       port_name           = "0x2f0000255c3a1108"
       port_state          = "Online"
[...]




# For information on SCSI disks connected to a system ('-v' for verbose):

systool -c scsi_disk
Class = "scsi_disk"

  Class Device = "0:0:0"
    Device = "0:0:0:0"

  Class Device = "0:0:0"
    Device = "1:0:0:0"

  Class Device = "0:0:0"
    Device = "2:0:0:0"

  Class Device = "0:0:1"
    Device = "0:0:0:1"

  Class Device = "0:0:1"
    Device = "1:0:0:1"

  Class Device = "0:0:1"
    Device = "2:0:0:1"

  Class Device = "0:1:0"
    Device = "1:0:1:0"

  Class Device = "0:1:0"
    Device = "2:0:1:0"

  Class Device = "0:1:1"
    Device = "1:0:1:1"

  Class Device = "0:1:1"
    Device = "2:0:1:1"



# To show more disk information including which hosts are connected to which disks:

systool -b scsi -v

[...]

0 (0)
Article Rating (No Votes)
Rate this article
Attachments
There are no attachments for this article.
Comments
There are no comments for this article. Be the first to post a comment.
Full Name
Email Address
Security Code Security Code
Related Articles RSS Feed
ZPOOL: Grow a zpool by adding new device(s)
Viewed 821 times since Sun, Jun 3, 2018
Modifying the inode count for an ext2/ext3/ext4 file system
Viewed 155 times since Fri, Sep 18, 2020
SPRAWDZONA KONFIGURACJA RSYSLOG I LOGROTATE, JAKO ZEWNĘTRZNEGO SERWERA SYSLOG
Viewed 1557 times since Fri, Nov 30, 2018
LUKS List available methods of encryption for LUKS
Viewed 620 times since Fri, Jul 13, 2018
RHEL: Allowing users to ’su’ to "root" / Allowing ’root’ to login directly to the system using ’ssh’
Viewed 1073 times since Sat, Jun 2, 2018
Linux Kernel /etc/sysctl.conf Security Hardening
Viewed 2076 times since Fri, Aug 3, 2018
Linux 16 Useful Bandwidth Monitoring Tools to Analyze Network Usage in Linux
Viewed 168 times since Mon, Sep 21, 2020
RHEL: GPT/MBR partition tables (using disks larger than 2 TiB)
Viewed 1314 times since Sun, May 27, 2018
LVM basic
Viewed 897 times since Sat, Jun 2, 2018
linux aix Killing a process and all of its descendants
Viewed 383 times since Tue, May 5, 2020