Silicon Graphics IS2224, Setup Manual, Page: 20 / 72

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1: Introduction
Optional IS2224 JBOD Storage
IS2224 JBODs are 2U, rack-mountable storage enclosures based on 6Gb/s SAS technology and
powered by the LSI SAS2x36 6Gb/s SAS expander IC. They offer hot-swappable drive bays that
support 3Gb/s and 6Gb/s SAS hard disk drives (HDDs) or solid-state drives (SSDs). The
following paragraphs and illustrations provide an overview of the IS2224 JBOD; for more detailed
information see the
SGI InfiniteStorage IS2224 Installation and Overview Guide , P/N
007-5830-00 x .
IS2224 JBOD Front-Panel Features
The JBOD storage enclosure has a front control panel (1), slots for up to 24 drives (2) and plastic
end caps as shown in (3) to cover the front-mounting hardware.
Figure 1-4 IS2224 JBOD Storage Enclosure Example (Front View)
The front-panel control LEDs (see callout (1) in Figure 1-4 and also Figure 1-5 on page 5 ) provide
status and operational information for the JBOD enclosure. Note that during the power-up process
these LEDs may flash intermittently until all sub-systems within the enclosure are fully powered
on. Ensure that all storage enclosures in the system have powered on fully before bringing the
system server online. The indicators have the following functions:
(1) Storage enclosure identifier LED - this blue/white indicator is on for unit identification only
(2) Amber service action required LED
(3) Amber over temperature warning LED
(4) Green “power good” LED lights when the enclosure is fully operational
(5) Green “standby” power mode LED lights when power is available (but unit is not operational)
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