ATTO Technology iPBridge 1550D, Инструкция по установке и эксплуатации

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7 Some older switches cannot autonegotiate
between the host and the switch properly. You
may have to force the host or switch to the
desired speed.
For a NIC using an OS iSCSI driver, continue to
the iSCSI OS driver section.
Check the iSCSI OS driver
This section is for hosts using a driver that allows
the OS to talk to iSCSI targets via a NIC, not an
iSCSI storage adapter.
1 A PC using an iSCSI storage adapter and an
iSCSI OS driver might not work correctly on the
same machine. Check with the vendors to
make sure they are compatible.
2 Verify that the PC has the latest iSCSI driver as
well as the required service packs and patches.
Check with the iSCSI OS driver vendor for more
information.
3 Verify that the iSCSI OS driver has started.
Look under
Device Manager for Windows or
lsmod for Linux.
4 Verify that the iSCSI OS is still looking for the
iPBridge at the right IP address.
5 If using DHCP, verify that the DHCP server is
assigning the correct IP information to the host.
6 Verify that the NIC is configured with the correct
IP information.
7 Verify that the hosts and the iPBridge are using
the same port number to communicate via
iSCSI. The default port number for the iPBridge
is 3260.
8 Check cable integrity. Check the cables for
solid connections. Make sure they are plugged
in properly. Inspect cable ends for broken clips
and improper wiring.
Check the Operating System
1 Verify that the OS has the required service
packs or patches installed. If not, obtain the
proper service packs and patches and install
them.
2 Some iSCSI host adapters and iSCSI OS
drivers do not always automatically find new
targets when plugged in or when forced to
rescan. Reboot the hosts.
3 Check if the vendor has a new driver. If so,
install it.
Check the applications
1 Verify that the application is running the latest
device drivers for the devices connected to
iPBridge. If not, get the latest device drivers and
install them.
2 Verify with the application vendor if the iSCSI
technology is supported on the version of the
application being used.
Performance issues
If the host is not getting the performance it should,
check the following items.
Check SCSI devices
1 Verify that the devices are running at their
highest possible SCSI speed.
Mixing SE and LVD devices on the same SCSI
bus forces the speed of the bus to SE, thus
slowing faster LVD devices. The iPBridge
cannot accelerate an already slow device.
Refer to
Connecting SCSI devices to the SCSI
port on page ii of the Appendix.
2 Verify that the proper terminator is being used.
An SE terminator forces the SCSI bus to SE
speeds.
Check the iPBridge SCSI port
1 Verify that the SCSI port configuration is set to
the highest speed using the ExpressNAV
interface,
SCSI page.
The iPBridge SCSI port speed, wide
negotiation, and sync negotiation settings all
affect the speed of the port. By default, these
settings are set for optimal speed.
Check the iPBridge Ethernet port
1 Verify that the data port is set to auto negotiate
or forced to 1000 Mb.
2 Verify that the MTU size is set to optimal setting
for the LAN/WAN environment.
The current optimized frame size for the
iPBridge is 9k.
Check the LAN/WAN
1 Verify that the MTU size is set to optimal setting
for the LAN/WAN environment.
9k frame size is the current optimized frame
size for the iPBridge. Many switch and router
vendors do not support the larger frame size of
9k or 16k.