Internal Hard Disk I/O Subsystem
The Netra X4200 M2 server supports up to four hard disk drives, controlled by an LSI SAS1064
controller providing four ports of SAS connectivity to disk drives at bandwidths of 3Gb/sec. full duplex
for each disk.
Disks are NEBS Certified 146-GB, 10000-rpm SAS disks, 2.5-inch small form factor server grade, and
are certified for 24x7 operation. Due to the small physical size of these drives and the high spindle
speeds, access times to disk are extremely good. All disks are hot-pluggable.
A benefit of using small disks is that they allow designers to maximize the air intake area at the front of
the server to improve airflow, further increasing environmental margins and server reliability.
Hardware RAID (striping and mirroring) is supported on the Netra X4200 M2 server. RAID technology
allows for the construction of a logical volume, made up of several physical disks, to provide data
redundancy, increased performance, or both. The Netra X4200 M2 server onboard disk controller
supports the following RAID configurations:
• Integrated Stripe, or IS volumes (RAID 0)
• Integrated Mirror, or IM volumes (RAID 1)
Power Supplies
The Netra X4200 M2 server is equipped with a dual redundant hot-swappable power supply system. One
power supply is sufficient to run a fully populated server, however for maximum protection against
power supply failures, Sun recommends that both power supplies be installed in the system at all times.
The power supplies are rated at 550 watts each. In normal operation, the power supplies share the power
demands of the system equally between the pair.
Refer to the Specifications section for more information on power ratings.
Front and Back Panel Features
Just the Facts, August 2007 Sun Confidential: Internal and Sun Channel Partners Use Only 21
