File_System_Migration

CDMS Overview
NFS specific NFS restrictions and limitations include the following:
◆ Files that cannot be opened by the Data Mover by using the NFS
protocol (for example, device files in use by the source operating
system, named pipes, and so forth) cannot be migrated by CDMS.
They can be copied to the destination Data Mover by other
methods, however.
◆ Timestamps associated with attribute changes are not migrated.
◆ An NFS/CIFS file system shared by UNIX workstations and
Windows clients cannot be migrated to an MGFS volume on a
VNX. To migrate it, you must choose to migrate either CIFS or
NFS attributes, therefore losing the other.
CIFS specific CIFS restrictions and limitations include the following:
◆ Data encrypted by the Microsoft encrypt attribute feature must
not be migrated to the VNX. If you need to migrate this data, you
must decrypt it before the migration begins. The data is skipped
during migration. The dirprivW.pl script can identify the
Microsoft-encrypted data.
Refer to http://www.microsoft.com, and search on “decrypting”
for information on decrypting any encrypted files.
◆ Filename alternate streams are not migrated in CIFS.
◆ A CIFS 8.3 DOS name might not be preserved. Since the mangling
mechanism is different between Windows NT 4.0 and VNX, the
M8.3 name might be different before and after migration.
◆ Compressed files based on NTFS are migrated as noncompressed
files.
◆ Cross-domain migration (for example, Windows NT 4.0 to
Windows 2000 or Windows Server 2003) is not supported. The
source file server, Windows client, and Data Mover must all be
within the same domain.
◆ Data migration is not supported from domain controllers such as
DCs, PDCs, or BDCs.
◆ Domain local groups used in Windows 2000 or Windows Server
2003 can be migrated to a Data Mover. Domain local groups used
in Windows NT 4.0 can only be copied by LGDUP and become
ordinary local groups on the VNX.
◆ Share names that are connection points are not supported.
32 VNX File System Migration Version 2.0 for NFS and CIFS User Guide 7.1