Question regarding ReadNAS file system and LUN data

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kderski wrote:

I can find The Volume Subfolders and even the particular LUN folder itself, but those directories are showing up empty, even with ROOT access. 

 

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You should see a hidden .iscsi folder in the LUN folder

root@NAS:/data/TestLun# ls -als
total 32
 0 drwxr-xr-x 1 root root  12 Aug 10 18:26 .
32 drwxr-xr-x 1 root root 498 May  7 12:16 ..
 0 drwxr-xr-x 1 root root  74 Aug 10 18:26 .iscsi
root@NAS:/data/TestLun#

In that subfolder you should find the backing store for the LUN

root@NAS:/data/TestLun/.iscsi# ls -als
total 1048580
      0 drwxr-xr-x 1 root root         74 Aug 10 18:26 .
      0 drwxr-xr-x 1 root root         12 Aug 10 18:26 ..
1048576 -rw-r--r-- 1 root root 1073741824 Aug 10 18:26 iscsi_lun_backing_store
      4 -rw-r--r-- 1 root root         36 Aug 10 18:26 .serial_number
root@NAS:/data/TestLun/.iscsi#

iSCSI LUNs are raw block storage, so the contents of the backing store are opaque to the NAS.  

There are some software tools that might help.  For instance, ReclaiMe: https://www.reclaime.com/library/iscsi-recovery.aspx

This isn't something I've needed to do, so it is not a recommendation - just a pointer in a direction that might be helpful to you.