User manual

Intregrate iXOS-JUKEMAN into the network
iXOS-JUKEMAN 2.2 User Manual Pre.12/97 83
The retrans=14 option instructs the kernel’s NFS client to automatically
retransmit a request 14 times before it gives up and the file system access
that caused the NFS request fails. It makes sense to specify a high value
because if several clients access different disks located in the same juke-
box, the server must move these disks, and the last client must wait a long
time. You can avoid long wait times if you have enough jukeboxes and
enable the server to distribute the load by duplicating the disks and
spreading them over the jukeboxes. This enables you to build failure-
tolerant archives with predictable short response times.
The soft option instructs the kernel’s NFS client to give up after all re-
transmits. You can also specify hard angeben causing the client not to
give up even after the last retransmit. If you specify an additional intr
option the system call that caused the NFS request may be interrupted
with a signal. If you specify hard without intr the only way to finish the
system call is a server response.
If the mount command generates a “no such file or directory”
message, make sure the /cd directory on the client side and the
/views_rr on the server side exist. If you receive a “permission de-
nied” message, just export /views_rr on the server side.
If your client computer uses a PC operating system such as DOS or NT
arbeitet, you can install an NFS client on the PC or install a PC file server
such as samba on the server computer. You can obtain samba from the
iXOS ftp server ftp.ixos.de, or from samba.anu.edu.au, under
pub/samba. The latest version of samba is included with iXOS-
JUKEMAN. You can find more information about this package at the
samba web site, http://samba.anu.edu.au.
Macintosh Clients
iXOS-JUKEMAN allows Macintosh clients to access disks in a jukebox. To
export the iXOS-JUKEMAN file system to Macintosh computers, the
‘MacFile’ service module for Windows NT must be installed. The module
can be installed from the ‘Network’ configuration dialog in the ‘Control
Panel’. It is either on the Windows NT CD-ROM or on an additional CD-
ROM available from Microsoft.
If that service is installed, then a virtual volume can be created with the
File Manager (not with the Windows NT Explorer!). Such a volume can be
connected from the Macintosh clients over an NT share name.
There is one restriction with the MacFile service: If disks in a jukebox are
changed, then the Macintosh clients are not notified about changed or
news disks. The above explained volume has to be recreated.