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P a g e
Map Devices
After getting an IP address and logging into the ATTO XstreamVIEW™ System Manager, you have options to map devices so that th e
XstreamCORE can access the devices in your network.
The ATTO
XstreamCORE allows parallel SAS/SATA devices to
participate in a Fibre Channel arbitrated loop or on a fabric.
Fibre Channel and SAS/SATA use different models to address
devices. The XstreamCORE translates between these
addressing models.
XstreamCORE mapping
WWN:
To identify each Fibre Channel device while addressing, each
Fibre Channel device is assigned a unique World Wide Name
(WWN). The 64-bit WWN has the following format:
Field
Name
WWN
Format
Company ID
Device ID
Byte
0
1
2
3
4
5
6
7
Value
20
00
00
10
86
xx
xx
xx
SAS/SATA device mapping
SAS/SATA devices connected to the XstreamCORE are viewed
as Fibre Channel LUNs to the host computer.
The ATTO XstreamVIEW™ interface displays the current
mapping information for SAS/SATA devices. Refer to
Interface
Options
.
SCSI commands sent to offline devices are rejected.
RAID device mapping
When using the XstreamCORE FC 7550 or XstreamCORE FC
7600 with a device that supports multiple LUNs behind a
target, such as a RAID array, you must disable SAS Mapping
by Topology.
1.
If you are not already in the XstreamVIEW™ interface,
type the IP address of your XstreamCORE into a standard
browser
2.
Click on the Advanced menu item on the left side of the
screen
3.
The Advanced CLI Configuration page appears
4.
Type Set SASMapByTopology disabled
5.
Type SaveConfiguration restart
6.
Once the XstreamCORE restarts, any attached RAID
devices will be scanned and all LUNs will be mapped.
If SASMapByTopology is enabled, RAID Processor LUNs
will be mapped, but not RAID Groups. Alternatively, you may connect
to the CLI via the XstreamCORE serial port and issue the above
commands.
Drive Map Director
TM
Drive Map Director uses SMP to provide a predictable
mapping structure for devices attached to the XstreamCORE
FC 7550 and XstreamCORE FC 7600. To use this feature, drive
enclosures must support SAS expanders with SMP protocol
such as the HP StorageWorks D2700 SAS JBOD. If SMP
supporting expanders are not present in your storage system
the XstreamCORE will revert to the AutoMap feature (see
Automap devices
)
