System Rackmounting Kit; Reliability, Availability, And Serviceability (Ras) - Sunfire V480 Administration Manual

System Rackmounting
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The Sun Fire V480 Server is intended to operate in a four post rack within a data center. The system is only 24" deep
and will fit in Sun StorEdge cabinet and most third party 30", 32" or 36" depth four post cabinets. Data centers typically
arrange equipment within racks for the most efficient use of floor space. Each Sun Fire
kit and cable management arm.
An optional two post rack mount kit is also available, X9631A. The server is 5 rack units (RU) high and within a 36RU
Sun StorEdge rack five fully populated(including PCI cards) Sun Fire
from 70 lbs. minimal configuration to 100 lbs. fully configured, approximately.
For servicing in a four post cabinet, slide the system forward from the rack. The two top panels open for access to the dual
processor/memory modules or the I/O subsystem, including the PCI adapters. The majority of components are capable of
being serviced without dismounting from the slides.
The Sun DeLorean Rack, SG-XARY030A, may be used. The Sun Serengeti Expansion Rack, SF-XCAB, may also be
used. (NOTE: SF-XCAB under review for fit and regulatory approval).
Other manufacturers of cabinets include, but are not limited to:
Rittal (www.rittal.com),
Pentair (www.pentair-ep.com),
APW/Wrightline (www.wrightline.com)
All offer four post cabinets that are 78" (2,000 mm.) high and 32" or 36" (800 or 900 mm.) deep. None of these products
have been tested and neither the companies nor the products are endorsed or supported by Sun.
Additional information may be found under:
http://workgroup.corp/sales/rackmount/rackmount_guidelines.html

Reliability, Availability, and Serviceability (RAS)

Reliability, availability and serviceability are three aspects of the design and quality of a system that contribute to
continuous operation and consequently, minimize system downtime.
Reliability
Reliability refers to a system's ability to operate continuously without failures and to maintain data integrity.
Reliability influences MTBF.
Availability
System availability measures the percentage of time that a system is accessible by users and is providing service.
Serviceability
Serviceability measures the time to restore a system to operation once a failure has occurred. Serviceability influences
MTTR.
Various metrics may be applied in calculating RAS, including:
MTBF - mean time between failures. MTBF measures system reliability and how often a system will fail. This
measurement is influenced by quality, design, environmental considerations such as power and cooling and even
operational errors, i.e. how well the hardware and software verifies the intention of staff.
MTTR - mean time to restore. MTTR is a measure of system maintainability and usually includes diagnostic and repair
times only. Dispatch and response time of service personnel are typically not included in this calculation as this factor is
dependent upon service contracts (SLAs), geographical conditions, etc. which can radically influence the measurement.
Nevertheless, these times will ultimately influence availability.
Simplistically stated, Availability = MTBF / (MTBF + MTTR)
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Sun Fire V480 Server
Just the Facts
Sun Proprietary and Confidential - Internal Use Only
TM
Sept. 26, 2002
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V480 ships with a Four post rack
V480 Servers may be installed. Each unit weights
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