XRS10L240 Datasheet, PDF (2/38 Pages) Exar Corporation – SERIAL ATA II: PORT MULTIPLIER / PORT SELECTOR

EXSTOR - 1 XRS10L240
SERIAL ATA II: PORT MULTIPLIER / PORT SELECTOR
REV. 1.05
To summarize, the port multiplier functionality in the XRS10L240 allows the system designer to increase the
number of serial ATA connections in an enclosure that does not have a sufficient number of serial ATA
connections for all of the drives in the enclosure. The port selector functionality in the XRS10L240 allows
replacement for expensive Fibre Channel drives with cost effective and high capacity SATA drives in enterprise
class applications without compromising on redundancy or performance.
STANDARDS COMPLIANCE
The XRS10L240 is compliant with the following industry specifications:
• Serial ATA, Revision 1.0a
• Serial ATA II: Extensions to Serial ATA 1.0a, Revision 1.2
• Serial ATA II PHY Electrical Specifications, Revision 1.0
• Serial ATA II: Port Selector, Revision 1.0
• Serial ATA II: Port Multiplier, Revision 1.2
• Serial ATA II: Revision 2.6
APPLICATIONS
• Serial ATA Enclosures
• Other Serial ATA link replicator applications
• Buffers for externally connected links
• High density storage boxes
• RAID Subsystems
APPLICATION EXAMPLE
The XRS10L240 is ideally suited for use within an external drive enclosure as a means of providing redundant
host access to ensure system availability and reliability, while enabling access to up to four target devices per
XRS10L240. This application is shown in Figure 1. Other applications for the XRS10L240 include use in fixed-
content or network attached storage systems, storage arrays, desktop applications or entry-level servers,
RAID storage or disk-to-disk backup.
2