ATTO Technology FastStream NDMP 4600, Инструкция по установке и эксплуатации

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Appendix
devices are mixed with faster devices, the bus
communicates at the rate of the slowest device,
thus wasting the performance capabilities of the
faster devices. Connect slower devices to one
SCSI port and connect faster devices to the other
port.
The FastStream NDMP 4600 supports a wide
variety of SCSI storage devices including stand-
alone drives, removable drives, JBODs, RAIDs,
tape, CD and DVD drives, changers and libraries.
1 Connect the cable from the SCSI device to a
VHDCI SCSI port on the FastStream NDMP
4600.
2 Check the type of cable, cable length limit and
number of devices recommended for the port.
See Exhibit 1.
Keep cable lengths as short as possible to
ensure the highest signal quality and
performance. These cable lengths include the
wiring inside the devices.
3 Set the IDs of the SCSI devices connected to
the FastStream NDMP 4600 to a value other
than 7.
Use a sequential ID starting at 0 for each
device. The SCSI port in the ATTO FastStream
NDMP 4600 has an internal factory setting ID of
7, typical for a SCSI initiator device.
Note
The entire SCSI bus operates at the speed of
the slowest device on that bus. If you wish to
mix devices of different SCSI speeds, place
the devices on separate busses. That is, put
the slower devices on FastStream NDMP
4600 SCSI port 1, and the faster devices on
FastStream NDMP 4600 SCSI port 2. Each
bus is independent so each can operate at
different speeds.
Terminate the SCSI bus after the last device.
The FastStream NDMP 4600 is terminated
internally.
Ethernet connections
Use at least Cat 5e cable to connect the Ethernet
ports to your network.
Note
For best performance, all cabling, network
interface cards (NICs), host bus adapters
(HBAs), and network switches must be Gigabit
Ethernet (GbE), and at least Cat 5e certified.
Most standard offices use 2-pair wiring which
is not compatible. GbE requires 4-pair wiring.
For best performance, support for 9014 byte
jumbo frames should be available for all switches
and host NDMP equipment.
Before you begin installing the FastStream
NDMP 4600 Ethernet ports, be sure to check or
complete the following:
• If you are managing your NDMP system across
a WAN and your system uses a firewall, be sure
that the following ports are open and available:
If you are using the TCP protocol
• telnet (port 23)
• http
(port 80)
• ftp (ports 20 and 21)
• NDMP (port 3260)
• iSNS (port 3705)
If you are using the UDP protocol
• ntp (port 123)
• Be sure your host system(s) is set up and
configured.
• Your host system can use any of three
different types of cards: a network interface
card (NIC), a TCP/IP offload engine card
(TOE), or a storage network interface card
(SNIC).
• The ATTO driver file from the CD included
with your FastStream NDMP 4600 or from
the ATTO website,
www.attotech.com
, is
installed on your host.
• The switch has been configured to forward
UDP broadcast messages.
• The minimum requirement for Windows-based
browsers is Internet Explorer 5.5 or Netscape
Navigator 6.2. The minimum requirement for
Macintosh browsers is Internet Explorer 5.2 or
Safari 1.2.
• Ethernet speed defaults to auto; the FastStream
NDMP 4600 determines the speed and set other
parameters based on the speed.