Grass Valley K2 Media Client Service Manual Nov.18 2008 - Manual (Page 25)

July 28, 2008 K2 Media Client Service Manual 25
Power supplies
The two RAID 1 drives for system data form one LUN and the RAID drives for media
storage are configured as RAID 1 or RAID 0. Each LUN appears to the operating
system as a single disk.
In internal storage models, media data is written or “striped” across the media disks
in a continuous fashion, which makes the disks a “stripe group”. This media stripe
group appears as the V: drive to the Windows operating system.
The system disk has a C: partition for application and operating system files, a D:
partition for the media file system, database, and configuration information, and an E:
partition for recovery images.
When configured as RAID 1, you can remove and replace a RAID drive while the K2
Media Client is operational. Refer to
“RAID disk removal” on page 107 for
procedures.
Power supplies
The K2 Media Client has redundant (two) power supplies. The power supplies can be
accessed from the rear of the unit. You can remove and replace a power supply while
the K2 Media Client is operational. Each power supply has a fan with automatic speed
control and status LEDs that indicate current state and health. Refer to
“Power supply
problems” on page 91 for LED descriptions. The power supply has protection for over
voltage, over current, and short circuits.
Refer to “Power supply removal” on page 107 for procedures.
Removable media drives
The K2 Media Client uses a standard removable media drive similar to those found in
desktop PCs. The drive is accessed behind the front bezel. The drive uses standard
Windows drivers for easy plug-and-play installation. K2 Media Client options for the
removable media drive is as follows:
• One standard CD drive.
Refer to “Removable media drive removal” on page 111 for procedures.
Codec board
The codec board is oriented horizontally across the rear of the K2 Media Client
chassis. It provides the majority of the K2 Media Client’s media-related input and
output connectors on the rear panel. This board hosts the circuits responsible for
encoding/decoding video and processing audio and timecode. It is connected to the
motherboard via the RTP board.
The SDA-00 model, the SD-00 model, and the HD-00 model each use a different
codec board. The codec board in the HD-00 model can also host the mezzanine
boards, as described below.
Refer to “Codec board removal” on page 112 for procedures.