Drive Configurations
3-2 9710 System Assurance Guide MR0012J
■Drive Configurations
The LSM is shipped standard with no drive plates and with two 14-pack arrays
above the drive wall (Panel 2). If fewer than four drives are ordered, two 14-
pack arrays are installed above the three drives. If fewer than seven drives are
ordered, one 14-pack array is installed above the six drives.
If the LSM is to contain more than six drives, you must also install the optional
power distribution unit (PDU) and the PRM logic card.
CAUTION:
You may not install 9840 drives and 4890 drives within the same LSM.
Follow these rules for the cartridge drives, their associated arrays, and the
cartridges used in the drives:
• Install drives from bottom to top.
• Allow no empty drive slots between installed drives.
•If fewer than six drives are installed, install the optional arrays on Panel 2.
• Do not use DATA D3 (helical recording) cartridges.
When mixing 4890 and DLT drives within the same LSM:
• No more than six 4890 drives may be installed
• The DLT drives must be installed above the 4890 drives.
When installing only DLT drives:
• A maximum of 10 drives may be installed per LSM.
When mixing 9840 and DLT drives within the same LSM:
• No more than six DLT drives may be installed
• The DLT drives must be installed above the 9840 drives.
• You may mix SCSI and Fibre Channel drives.
When installing only 9840 drives:
• A maximum of 10 drives may be installed per LSM.
• You may mix SCSI and Fibre Channel drives.
■Power Distribution Unit (PDU)
The standard 9710 can support up to 10 drives, but has power connections for
only six drives. When you order the 9710 mounting hardware kits for more than
six drives, you must also order the PDU. The PDU gives you power connections
for four additional drives.
The PDU is a pass-through AC connector box with a power drop cab le at one
end and receptacles for four drives at the other end. The box is mounted in the
9710, but must be connected to a separate cust omer power drop. The
international version comes without a cable plug, and cable leads are stripped.