topic Re: How to find LUN UUID on a Solaris host. in ONTAP Hardware

How to find LUN UUID on a Solaris host.

YASIRIMTEYAZ — Thu, 05 Jun 2025 05:49:32 GMT

In my scenario, LUNs are exposed to Solaris and Linux hosts via iSCSI. (We would be using FC connection too soon)

When LUNs are available to the host over iSCSI:

On a Linux host, I can get the LUN UUID from /dev/disk/by-id as follows -

$ ls -l /dev/disk/by-id

total 0

lrwxrwxrwx 1 root root 9 Nov 11 05:44 scsi-3600144f0dae0dd2200005280d1c80039 -> ../../sda

lrwxrwxrwx 1 root root 9 Nov 11 05:44 scsi-360a98000486e58676834746d7650724d -> ../../sdb

lrwxrwxrwx 1 root root 10 Nov 11 05:44 scsi-360a98000486e58676834746d7650724d-part1 -> ../../sdb1

In the above output, text in bold denotes the LUN UUID.

On a Solaris host, I am unable to get the UUID.
Since /dev/disk/by-id doesn't exist in Solaris, I am using iscsiadm command to get the LUN info.

####################################

# NetApp LUN exposed on a Solaris Host

####################################

bash-4.1# /usr/sbin/iscsiadm list target -S

Target: iqn.1992-08.com.netapp:sn.118057984

Alias: -

TPGT: 2000

ISID: 4000002a0000

Connections: 1

LUN: 0

Vendor: NETAPP

Product: LUN

OS Device Name: /dev/rdsk/c8t7d0s2

The LUN device on this Solaris host is appearing as /dev/rdsk/c8t7d0s2. With this, I am unable to get the LUN UUID.

When I try the same with a Sun ZFS filer, the OS Device Name contains the UUID.

#############################

# Sun ZFS LUN on a Solaris Host

#############################

bash-3.2# /usr/sbin/iscsiadm list target -S

Target: iqn.1986-03.com.sun:02:4b6d6ce8-9960-c7db-8742-f901f4eb95ca

Alias: kopnas301-iscsi

TPGT: 2

ISID: 4000002a0000

Connections: 1

LUN: 0

Vendor: SUN

Product: Sun Storage 7310

OS Device Name: /dev/rdsk/c1t600144F0DAE0DD22000052850E75003Ad0s2

How can I get the NetApp LUN UUID on a Solaris host?

Any help would be much appreciated.

Thanks

Re: How to find LUN UUID on a Solaris host.

HARI_KRISHNA981 — Fri, 15 Nov 2013 10:03:21 GMT

Hi Yasir,

Go through this thread, it contains the command to retrieve the LUN info

http://www.sunsolarisadmin.com/solaris-10/list-luns-attached-to-hbadisk-controllers-in-solaris-10/

http://blogs.warwick.ac.uk/peggleton/entry/disks_cfgadm_fcinfo/

I hope it may help you.

Regards,

Hari.

Re: How to find LUN UUID on a Solaris host.

YASIRIMTEYAZ — Fri, 15 Nov 2013 10:28:50 GMT

Thanks Hari for your response.

Both of the links have details when LUNs are connected through Fibre Channel (via HBA ports). However, I am using iSCSI connection.

The fcinfo, luxamd commands won't work with iSCSI connection.

Those threads couldn't help me.

Re: How to find LUN UUID on a Solaris host.

HARI_KRISHNA981 — Fri, 15 Nov 2013 10:42:44 GMT

Hi Yasir,

Go through this thread.

http://www.cuddletech.com/blog/pivot/entry.php?id=779

Regards,

Hari.

Re: How to find LUN UUID on a Solaris host.

YASIRIMTEYAZ — Fri, 15 Nov 2013 11:40:33 GMT

Thanks Hari.

Went through the above thread. In the thread, an example of SUN filer is taken.

As I have mentioned, if the LUN is coming from a SUN ZFS filer the LUN UUID can be obtained from /dev/dsk/.......

Only in case of NetApp, I am unable to figure out the LUN UUID.

As per the thread, I tried format command too, but I am not seeing the UUID.

bash-4.1# /sbin/format

Searching for disks...done

AVAILABLE DISK SELECTIONS:

0. c7t0d0 <LSI-MR9261-8i-2.12-556.90GB>

/pci@0,0/pci8086,340a@3/pci1000,9263@0/sd@0,0

1. c7t1d0 <LSI-MR9261-8i-2.12-278.46GB>

/pci@0,0/pci8086,340a@3/pci1000,9263@0/sd@1,0

2. c7t2d0 <LSI-MR9261-8i-2.12-278.46GB>

/pci@0,0/pci8086,340a@3/pci1000,9263@0/sd@2,0

3. c7t3d0 <LSI-MR9261-8i-2.12-278.46GB>

/pci@0,0/pci8086,340a@3/pci1000,9263@0/sd@3,0

4. c7t4d0 <LSI-MR9261-8i-2.12-278.46GB>

/pci@0,0/pci8086,340a@3/pci1000,9263@0/sd@4,0

5. c7t5d0 <LSI-MR9261-8i-2.12-278.46GB>

/pci@0,0/pci8086,340a@3/pci1000,9263@0/sd@5,0

6. c8t6d0 <NETAPP-LUN-7340-2.00TB>

/iscsi/disk@0000iqn.1992-08.com.netapp%3Asn.11805821507D0,0

7. c8t7d0 <NETAPP-LUN-7340-2.00TB>

/iscsi/disk@0000iqn.1992-08.com.netapp%3Asn.11805798407D0,0

8. c8t8d0 <NETAPP-LUN-7340-50.00GB>

/iscsi/disk@0000iqn.1992-08.com.netapp%3Asn.11805821507D0,1

9. c8t9d0 <NETAPP-LUN-7340-50.00GB>

/iscsi/disk@0000iqn.1992-08.com.netapp%3Asn.11805821507D0,2

10. c8t10d0 <NETAPP-LUN-7340-50.00GB>

/iscsi/disk@0000iqn.1992-08.com.netapp%3Asn.11805821507D0,3

11. c8t11d0 <NETAPP-LUN-7340-50.00GB>

/iscsi/disk@0000iqn.1992-08.com.netapp%3Asn.11805821507D0,4

12. c8t12d0 <NETAPP-LUN-7340-50.00GB>

/iscsi/disk@0000iqn.1992-08.com.netapp%3Asn.11805821507D0,5

13. c8t13d0 <NETAPP-LUN-7340-50.00GB>

/iscsi/disk@0000iqn.1992-08.com.netapp%3Asn.11805821507D0,6

- hit space for more or s to select -

bash-4.1#

Re: How to find LUN UUID on a Solaris host.

aborzenkov — Fri, 15 Nov 2013 19:31:24 GMT

Why do you need to know UUID? It is not directly visible on NetApp anyway and does not help in identifying LUNs.

Re: How to find LUN UUID on a Solaris host.

YASIRIMTEYAZ — Sun, 17 Nov 2013 07:32:44 GMT

I want to know the UUID to map the OS scsi device with the LUN on filer.
The LUN UUID can be fetched on NetApp with Data ONTAP api.