Nfs; Ftp/Fxp; Operating Environment For Clients - Fujitsu ETERNUS DX S5 Series Design Manual

4. NAS Functions

Operating Environment for Clients

NFS

The Network File System (NFS) is a protocol that is used for file sharing in UNIX or Linux system environments.
File sharing for NFS can be performed by mounting a shared directory from a client.
NFSv3 and v4.0 are supported for the ETERNUS DX.
For the NFSv4.0 protocol, the lease period and the grace period are each 100 seconds. In addition, the NFSv4.0
protocol supports stateful access.
Note
• The lease period indicates the time for the ETERNUS DX to determine whether the NFS client has
stopped. During this period, resources in the NFS clients such as locks are retained in the ETERNUS DX.
• The grace period indicates a time to prevent the lock from becoming lost by notifying the NFS client that
the NFS service has been restarted and securing time to reclaim the existing lock again.
• For NFS connections with the ETERNUS DX, the NFS client must use a port number less than 1024.

FTP/FXP

With File Transfer Protocol (FTP), the shared folder can be accessed. With File eXchange Protocol (FXP), data in
the shared folder can be transferred between ETERNUS DX storage systems.
Operating Environment for Clients
The ETERNUS DX can be connected to OSs that support available protocols for the ETERNUS DX.
For details on the protocols that are supported by the ETERNUS DX, refer to
For NFS access, it is necessary for the client to use a port number of less than 1024.
For details on the supported OSs, refer to "Supported OSs (in NAS Environments)" (page
162
"Supported Protocols" (page
316).
Design Guide
161).