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HP StoreEver MSL2024 User And Service Manual: Planning The Sas Configuration; San Connection

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A server that has FC-attached hard drives should have at least two FC ports. Using the same
FC port for disk and tape drive access can cause performance degradation.

SAN connection

All switches between the host and the tape drive must be of the appropriate type. A 2 Gb switch
in the path might cause performance degradation when backing up highly compressible data.
Configure zoning on the FC switch so that only the backup servers can access the tape drive.
For more information, see the switch documentation.
Cable requirements
You must provide an FC cable for each FC port you plan to use. The tape drive has an LC-style
connector. The maximum cable length is based on the tape drive and external cable type.
All except LTO-5
HHAll except LTO-5
* The LTO-5 Ultrium 3000 half-height drive is shown as LTO-5 HH.

Planning the SAS configuration

The server must have an Hewlett Packard Enterprise or third party SAS host bus adapter with
an external connector.
Table 7 SAS drive interface speeds
LTO generation
LTO-5, LTO-6, LTO-7
The library uses two SCSI logical unit numbers (LUNs) and requires an HBA with multiple LUN
support. Most Hewlett Packard Enterprise SAS RAID controllers support tape devices; many
other SAS RAID controllers do not support tape devices. To verify the specifications of your HBA
or find a list of compatible HBAs, see the Data Agile BURA Compatibility Matrix at:
Compatibility Matrix shows that the controller is qualified with the library. The server might not
be able to boot when the library is connected to a non-supported SAS RAID controller.
About SAS
SAS is a computer bus technology for transferring data to and from storage devices, including
disk drives and tape drives. SAS-1, which is used for LTO-4 tape drives, is designed to transfer
data at 3 Gb/s. SAS-2, which is used for LTO-5, LTO-6, and LTO-7 tape drives, is designed to
transfer data at 6 Gb/s.
Cable type
2 Gb
0.5 - 300 m
OM3, OM4
0.5 – 300 m
OM3, OM4
0.5 – 500 m
Supported speeds
1.5 Gb, 3 Gb
1.5 Gb, 3 Gb, 6 Gb
Do not connect the library to a SAS RAID controller unless the Data Agile BURA
4 Gb
0.5 – 150 m
0.5 – 150 m
0.5 – 380 m
Planning the SAS configuration
8 Gb
Not supported
0.5 – 50 m
0.5 – 150 m


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