HP StorageWorks MSL2024, Руководство пользователя и сервисное руководство

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Figure 17 Example SAS fanout cable
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The Library has a mini-SAS connector on each tape drive. The connector is keyed in location 4, which
is the standard location for end devices. If you use a cable other than the one recommended for use
with the product, verify that it is keyed in location 4.
CAUTION:
Mini-SAS connectors are keyed. Do not force a SAS cable's mini-SAS connector into the tape drive
mini-SAS connector because it might be keyed differently.
SAS signal rates require clean connections and a minimum number of connections between the HBA
and the device. Do not use adapters or converters between the HBA and the device. HP recommends
a maximum SAS cable length of six meters.
CAUTION:
High quality SAS cables rated at the transfer rate of the SAS components are required. Always verify
that the SAS cable you are using is rated for the data transfer speed of the interface of your
components. SAS cables described as "equalized" may not support 6 Gb/s data rates and should
not be used with LTO-5 tape drives unless these cables are verified for 6 Gb/s data rates. For optimum
performance, only use HP cables of the length specified as qualified for your products.
World Wide identifiers
A SAS tape drive is identified by a unique identifier called a World Wide Name (WWN) or World
Wide Identifier (WWID). The Library assigns the World Wide identifier to the drive bay. When a
tape drive is replaced, the World Wide identifier is re-assigned to the new tape drive.
The operating system tracks the World Wide identifier for the drive on each HBA channel. Each of
the drive connectors on the fanout cable is associated with an HBA channel. Once a drive has been
plugged in, it should remain on the same channel to retain the association between the HBA channel
and World Wide identifier.
Planning the Fibre Channel configuration
You can connect the Library directly to the server with a host bus adapter (HBA) or indirectly through
a storage area network (SAN) with a switch.
HP StorageWorks MSL2024, MSL4048, MSL8048, and MSL8096 Tape Libraries User and service
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