5-16 Dell PowerVault 720N, 740N, and 760N System Administrator and Command Reference Guide

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If you have a directory that contains more than 50,000 files, before triggering a con-
version, you can use an NFS client to distribute files among a greater number of
subdirectories. This speeds up the conversion process and avoids a possible crash.
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Use this procedure to convert a directory to Unicode format if you have access to a
Windows NT client connected to the filer. After you complete this procedure, you
have a Unicode directory containing files that were in a non-Unicode directory, and its
files are accessible to CIFS clients.
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To convert directories to Unicode format quickly, perform the following steps:
1. Create a new CIFS directory from a W indows NT client on the same volume in
the same qtree as the directory you want to convert.
2. With the NFS mv command, rename files from the directory you want to convert
into the directory you just created.
3. Optionally remove the old directory.
4. Optionally rename the new directory.
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If a user is using UNIX and tries to open a file with an ACL in a mixed or NTFS
(Windows NT security style) qtree, the filer uses NTFS security semantics to deter-
mine whether the user has access to the file.
The filer does this by converting the UNIX UID (User ID) into a Windows NT creden-
tial, which is also known as a WAFL (Write Anywhere File Layout) credential.
Windows uses the credential to verify that a user has access rights to the file. A UNIX
user can have both a UNIX name and a Windows name.
As part of the process of creating a WAFL credential, the filer contacts an NT domain
controller to look up a users SID (Security ID) and groups.