SAN File System natively is case-sensitive; however, Windows® applications can choose to use case-sensitive or case-insensitive names. This means that case-sensitive applications, such as those making use of Windows support for POSIX interfaces, behave as expected. Native Win32 clients (such as Windows Explorer) get only case-aware semantics.
The case specified at file-creation time is preserved, but in general, file names are case-insensitive. For example, Windows Explorer allows you to create a file named "Hello.c," but an attempt to create "hello.c" in the same folder will fail because the file already exists. If a Windows-based client accesses a folder that contains two files that are created on a UNIX-based client with names that differ only in case, its inability to distinguish between the two files might lead to undesirable results. For this reason, UNIX-based clients should not create case-differentiated files in filesets that will be accessed by Windows-based clients.
Parent topic: Windows-based clients