Understanding SID generation for UNIX users

Question

I have a mixed volume on Isilon and I access it from SMB and NFS.

Path: /ifs/mixed_mode, shared as SMB share and exported as NFS export as well.

If I mount such a volume on a Linux machine and create a few files and view them on SMB, I see the user and group on SMB as "S-1-22-1-1000" and "S-1-22-2-1000" respectively. For the Linux user, UID and GID are both thousand. So, it seems like 'S-1-22-1' and'S-1-22-2' prefix is prepended, but why? Is there a way I can query this prefix or infer this indirectly?

amandeepgautam · Accepted Answer

Found this: http://doc.isilon.com/onefs/7.0.2/help/en-us/GUID-EA9C1332-008C-4204-BC5C-31E1E6CCB335.html

DELL-Sam L · Answer

Hello amandeepgautam, Here is a link to a KB that may help.  You will need to login with your EMC account to view the KB.https://dell.to/305uNBF

Phil.Lam · Answer

@amandeepgautam, You have Samba? https://stackoverflow.com/questions/31109871/mapping-sambas-s-1-22-12-sid-into-names

Isilon

Understanding SID generation for UNIX users

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