1. In the same file
system of the existing EMC storage, the customer creates an NFS share, mounts
the share to the front-end Red Hat host, and creates an FTP share whose read
and write permissions are granted to FTP users. Then, the customer uses a
Windows host to access the FTP share as user wcmweb.
2. The customer
performs the same operations on OceanStor 6800 V3, uses the same front-end
Linux host, and creates local FTP authentication account wcmweb on OceanStor 6800 V3 for FTP access.
3. The customer mounts
the two NFS shares to the same Linux host, and then runs the following commands
to synchronize data from the EMC storage to OceanStor 6800 V3:
4. After data is
synchronized, the customer uses a Windows host to access the FTP shares on
OceanStor 6800 V3 as user wcmweb.
The wcmweb account has the write
permission of directories and files whose permission is 777, but cannot write those whose permission is 755.
5. The wcmweb account can write directories
and files whose permissions are 777 and 755 on the EMC storage.
1. Upload a file to or create a directory on OceanStor 6800
V3 by using FTP. The operation is successful. It proves that the issue is not a
2. For a file or directory whose permission is 755, only its owner has the write
permission. If a user uses the rsync commands containing the -o parameter
to migrate data, the owner properties are also migrated. In such cases, when
the user ID of the wcmweb account on
OceanStor 6800 V3 is different from the owner ID of the file or directory on
the EMC storage, the wcmweb account
does not have the write permission of the file or directory.
3. Check the owner IDs of files and directories on the
customer EMC storage. All owner IDs are 10001.
4. The user ID of the wcmweb account on OceanStor 6800 V3 is 100025, which is different from owner ID 10001 of files and directories on the EMC storage.
1. User IDs are authenticated in FTP authentication. Though
the FTP username in this case remains the same before and after data migration,
the UID changes and the user is identified as another one after the data
2. If the permission of a file is 755, the file owner has read, write, and execution permissions of
this file, and the owning group and other users have read and execution
permissions of it.
3. In this case, the file owner ID is 10001 and the UID of user wcmweb who accesses the files is 100025 and authenticated as another user. As a result, the user has no write
permission of some files.
On OceanStor 6800 V3, run CLI commands to create a local
authentication account and set its UID to 10001.
create resource_user general name=xxx primary_group_name=xxx user_id=10001