topic LUN Visibility in VMware Solutions Discussions

LUN Visibility

saranraj456 — Thu, 05 Jun 2025 06:47:46 GMT

Hello,

can anyone provide me the steps to find the diffrence B/w LUN and Local disk in host like windows2003,windows 2008,solaris,linux with the help of HUK and also without it?

Cheers,

Saran

LUN Visibility

baijulal — Thu, 18 Aug 2011 16:27:56 GMT

Are you looking to identify which are local disk and whichare LUINS presented on that host ?

LUN Visibility

rwelshman — Fri, 19 Aug 2011 09:30:01 GMT

If you look in Device Manager at the Disk Drives - the manufacteur of the disk is usually listed - so Netapp disks would be a NetApp LUN, for example.

LUN Visibility

saranraj456 — Fri, 19 Aug 2011 14:04:08 GMT

Yeah, i am looking for that info

LUN Visibility

saranraj456 — Fri, 19 Aug 2011 14:05:53 GMT

Thanks for the info!

That things will be used in windows,for unix host like LINUX,Solaris what would be the method/cmd to find out?

Re: LUN Visibility

arunchak — Sat, 20 Aug 2011 02:02:11 GMT

HI,

For Linux, install sansurfer package and say “sanlun lun show”. Hope this is useful.

Thanks,

Arun

LUN Visibility

saranraj456 — Sat, 20 Aug 2011 03:52:15 GMT

I am bit curious to know how could we differentiate LUN and Local disk ,without a HUK / Sansurfer packages installed ?.We came across such a difficulty in an incompatible machine that doesnt have any package to install.

Cheers,

Saran

Re: LUN Visibility

arunchak — Sat, 20 Aug 2011 04:30:34 GMT

Hi,

So you want to find the LUN’s connected without any external packages like sansurfer being installed.

Try out: ls -l /sys/block/*/device

Thanks,

Arun

LUN Visibility

arunchak — Sat, 20 Aug 2011 04:34:27 GMT

To give you an analogy:

[root@warspite ~]# ls -l /sys/block/*/device

lrwxrwxrwx 1 root root 0 Aug 20 00:20 /sys/block/hda/device -> ../../devices/ide0/0.0

lrwxrwxrwx 1 root root 0 Aug 20 00:20 /sys/block/sda/device -> ../../devices/pci0000:00/0000:00:04.0/0000:03:00.0/0000:04:01.0/host0/target0:0:0/0:0:0:0

lrwxrwxrwx 1 root root 0 Aug 20 00:20 /sys/block/sdb/device -> ../../devices/pci0000:00/0000:00:04.0/0000:03:00.0/0000:04:01.0/host0/target0:0:1/0:0:1:0

lrwxrwxrwx 1 root root 0 Aug 20 00:20 /sys/block/sdc/device -> ../../devices/pci0000:00/0000:00:04.0/0000:03:00.2/0000:05:01.0/host3/rport-3:0-2/target3:0:0/3:0:0:0

lrwxrwxrwx 1 root root 0 Aug 20 00:20 /sys/block/sdd/device -> ../../devices/pci0000:00/0000:00:04.0/0000:03:00.2/0000:05:01.0/host3/rport-3:0-2/target3:0:0/3:0:0:1

lrwxrwxrwx 1 root root 0 Aug 20 00:20 /sys/block/sde/device -> ../../devices/pci0000:00/0000:00:04.0/0000:03:00.2/0000:05:01.0/host3/rport-3:0-2/target3:0:0/3:0:0:3

[root@warspite ~]# sanlun lun show

controller: lun-pathname device filename adapter protocol lun size lun state

cos: /vol/NikhilSetupVMware/vcslun1 /dev/sdc host3 FCP 30g (32212254720) GOOD

cos: /vol/NikhilSetupVMware/vcslun2 /dev/sdd host3 FCP 10g (10737418240) GOOD

cos: /vol/NikhilSetupVMware/OC50VCS /dev/sde host3 FCP 10g (10737418240) GOOD

The ones that are bolded from the command " ls -l /sys/block/*/device" are the LUNs connected - which are also shown in sanlun lun show.

Thanks,

Arun

LUN Visibility

saranraj456 — Sat, 20 Aug 2011 16:23:46 GMT

Thanks arun!

What is the way to find the LUN exactly,when the host contains multiple LUN's with same size.?

Re: LUN Visibility

arunchak — Sat, 20 Aug 2011 17:54:19 GMT

HI,

See, with sansurfer or other software it should be easy. Otherwise, I am not very sure but can give you a hint:

In the output I gave you for analogy:

lrwxrwxrwx 1 root root 0 Aug 20 00:20 /sys/block/sdc/device -> ../../devices/pci0000:00/0000:00:04.0/0000:03:00.2/0000:05:01.0/host3/rport-3:0-2/target3:0:0/3:0:0:0

lrwxrwxrwx 1 root root 0 Aug 20 00:20 /sys/block/sdd/device -> ../../devices/pci0000:00/0000:00:04.0/0000:03:00.2/0000:05:01.0/host3/rport-3:0-2/target3:0:0/3:0:0:1

lrwxrwxrwx 1 root root 0 Aug 20 00:20 /sys/block/sde/device -> ../../devices/pci0000:00/0000:00:04.0/0000:03:00.2/0000:05:01.0/host3/rport-3:0-2/target3:0:0/3:0:0:3

were the 3 LUNs mapped to the host.

Now From filer view, the id’s of these 3 Luns mapped to this host are as follows:

Lun name - vcslun2 Lun id - 1

vcslun1 - 0

OC5OVCS – 3

If you see thelast digit of the output above (target mapped to):

ie.

target3:0:0/3:0:0:0

target3:0:0/3:0:0:1

target3:0:0/3:0:0:3

and map the Lun id, you should be able to differentiate.

So,

lrwxrwxrwx 1 root root 0 Aug 20 00:20 /sys/block/sdd/device -> ../../devices/pci0000:00/0000:00:04.0/0000:03:00.2/0000:05:01.0/host3/rport-3:0-2/target3:0:0/3:0:0:1

i.e device sdd should be the LUN vcslun2

Thanks,

Arun

LUN Visibility

arunchak — Sun, 21 Aug 2011 12:30:22 GMT

You can also find the vendor of the LUN and the id by executing "cat /proc/scsi/scsi" in RHEL

[root@warspite ~]# cat /proc/scsi/scsi

Attached devices:

Host: scsi0 Channel: 00 Id: 00 Lun: 00

Vendor: IBM-ESXS Model: CBR036C31210ESFN Rev: DFQG

Type: Direct-Access ANSI SCSI revision: 04

Host: scsi0 Channel: 00 Id: 01 Lun: 00

Vendor: IBM-ESXS Model: ST336607LC FN Rev: B25H

Type: Direct-Access ANSI SCSI revision: 03

Host: scsi0 Channel: 00 Id: 08 Lun: 00

Vendor: IBM Model: 25P3495a S320 1 Rev: 1

Type: Processor ANSI SCSI revision: 02

Host: scsi3 Channel: 00 Id: 00 Lun: 00

Vendor: NETAPP Model: LUN Rev: 7330

Type: Direct-Access ANSI SCSI revision: 04

Host: scsi3 Channel: 00 Id: 00 Lun: 01

Vendor: NETAPP Model: LUN Rev: 7330

Type: Direct-Access ANSI SCSI revision: 04

Host: scsi3 Channel: 00 Id: 00 Lun: 03

Vendor: NETAPP Model: LUN Rev: 7330

Type: Direct-Access ANSI SCSI revision: 04

Thanks,

Arun

LUN Visibility

saranraj456 — Mon, 29 Aug 2011 19:10:33 GMT

Arun,

is it possible by anyway to find the LUN using a serial number in it?

Cheers,
Saran

LUN Visibility

arunchak — Tue, 30 Aug 2011 02:03:29 GMT

HI,

LUN id is the unique identifier between the host and the filer (storage) to differentiate between LUNs. There should be a way to find the LUN using serial number. I am currently not aware of it. Will let you know if I find anything.

Thanks,

Arun

LUN Visibility

saranraj456 — Wed, 07 Sep 2011 08:52:42 GMT

Arun,

We have used luxadm in solaris to find out the serial no with the help of that we can match the LUN with Serial No.

# luxadm display /dev/rdsk/c0t600015D0002028000000000000001142d0s2

DEVICE PROPERTIES for disk: /dev/rdsk/c0t600015D0002028000000000000001142d0s2

Vendor: SUN

Product ID: SE6920

Revision: 0202

Serial Num: 00500057

Unformatted capacity: 10240.000 MBytes

Read Cache: Enabled

Minimum prefetch: 0x0

Maximum prefetch: 0xffff

Device Type: Disk device

Path(s):

/dev/rdsk/c0t600015D0002028000000000000001142d0s2

/devices/scsi_vhci/disk@g600015d0002028000000000000001142:c,raw

Controller /dev/cfg/c4

Device Address 213600015d207200,0

Host controller port WWN 210100e08b206812

Class primary

State ONLINE

Controller /dev/cfg/c11

Device Address 213600015d207200,0

Host controller port WWN 210100e08b30a2f2

Class primary

State ONLINE

Cheers,

Saran

Re: LUN Visibility

arunchak — Wed, 07 Sep 2011 12:14:16 GMT

Thanks

There is an equavelant way by using lscfg in Linux. Guess, I need to install couple of rpm's to make it work.

Thanks,

Arun