Sun Microsystems StorageTek L40, Installation Manual

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Standard Installation Procedure
1-24 Revision L 96053
The drive interfaces are SCSI high voltage differential (HVD) or SCSI low voltage
differential (LVD). The HVD interface allows longer cable lengths, but throughput is
slower than with the LVD interface. The LVD interface restricts cable lengths, but
provides faster throughput.
The following table shows the types of drives and the interfaces that are supported.
Table 1-3. LTO Drive Backward Readability
LTO Gen 2 Drive LTO Gen 3 Drive
LTO 1 media Read and write Read only
LTO 2 media Read and write Read and write
LTO 3 media No action Read and write
Table 1-4. SCSI Device/Bus Types: Issues
If you plug a . . . Into . . . The result is . . .
Single-ended device
Single-ended bus Proper connection
LVD bus Single-ended mode
HVD bus Operation disabled
Low voltage
differential device
Single-ended bus Single-ended mode
LVD bus Proper connection
HVD Potential damage /disabled device
High voltage
differential device
Single-ended bus Disabled device
LVD bus Potential damage /disabled device
HVD bus Proper connection