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> 1 pc. lsi logic# LSISASX12 (62045B2), 12-port sas/sata
1 pc. lsi logic# LSISASX12 (62045B2), 12-port sas/sata
The LSISASx12 expander is a 12-port, 3 Gbit/s Serial Attached SCSI
(SAS) expander device. The LSISASx12 expander provides the
functionality for connecting targets and initiators. The expander provides
phys for up to 12 SAS initiator, SAS target, SAS expander, or Serial ATA
(SATA) target devices. The LSISASx12 supports both wide and narrow
port configurations. Narrow ports have one phy per port. Wide ports have
Figure 1 shows a typical application.
Each of the 12 phys on the expander supports SAS transfers of up to
3.0 Gbits/s and SATA transfers of up to 1.5 Gbits/s. The expander
supports direct, table, and subtractive routing modes. LSI Logic
manufactures the LSISASx12 expander with the LSI Logic Gflx
The expander supports the SAS protocol as described in the
Attached SCSI (SAS) Standard, version 1.0,
BROADCAST(CHANGE) primitive for virtual phy resets, enables,
Report Manufacturing Information in the format defined by the SAS
ALIGN transmission from expanders
The LSISASx12 12-port SAS expander offers high performance, high
disk drive connectivity, scalability, and flexibility in various storage
environments as an alternative to today s expensive and complex
offerings. The LSISASx12 SAS expander is ideal for high availability and
scalable server clustering environments and front-end storage
subsystems used in clusters, SANs, and NAS environments. LSI Logic
SAS expanders are ideal for data centers and storage area networks,
leveraging existing SCSI infrastructure for investment protection and
ease of migration and implementation.
The LSISASx12 can be used in simple topologies to attach an initiator
to SAS/SATA devices, in edge expander topologies to increase the
number of accessible devices, or in fault-tolerant path-redundancy
topologies to improve system reliability. By cascading multiple
LSISASx12 expanders, users can attach up to 144 devices.
shows a path redundancy application that utilizes dual-ported drives.
