Grass Valley K2 Media Client Service Manual v.3.3 - Manual (Page 37)

June 25, 2009 K2 Media Client Service Manual 37
Graphics board
Graphics board
This board provides enhanced performance for screen graphics and a connection for
a VGA monitor. The graphics board plugs into one of the standard PCI slots on the
motherboard.
Refer to “Graphics board removal” on page 135 for procedures.
SCSI controller adapter
A K2 Media Client must provide RAID controller functionality for the internal RAID
disks. On internal storage models, both system and media data require this RAID
controller functionality, as both are stored on the internal RAID disks. On external
storage models, only the system data requires RAID controller functionality, as the
media is stored on the K2 Storage System or on direct-connect RAID storage.
Therefore, RAID controller adapter configuration varies, as follows:
• Some external storage K2 Media Clients have no RAID controller adapter. Instead,
the RAID controller functionality is provided by the motherboard. Also, these K2
Media Clients have SATA drive connector boards rather than a SCSI backplane.
• Other K2 Media Clients have a SCSI controller adapter and a SCSI backplane.
These K2 Media Client can be either internal storage or external storage. On these
K2 Media Clients the SCSI controller adapter provides the SCSI controller
functionality for the internal RAID disks. The SCSI controller adapter plugs into
one of the standard PCI slots on the motherboard.
Refer to “SCSI controller adapter removal” on page 137 for procedures.
SATA drive connector board
A K2 Media Client must provide connections for RAID drives to support hot-swap
functionality. On internal storage models, both system and media drives require
connections. On external storage models, only the two system drives require
connections. Therefore, backplane configuration varies, as follows:
• Some external storage K2 Media Client have no SCSI backplane. Instead, RAID
drive connections are provided by two SATA drive connector boards, supported by
a bracket, which is mounted in the center of the unit. On these K2 Media Clients
there is also no SCSI controller adapter.
• Other K2 Media Clients have a SCSI backplane and a SCSI controller adapter.
These K2 Media Client can be either internal storage or external storage.
Refer to “SATA drive connector board removal” on page 131 for procedures.
SCSI interface board
This board provides the SCSI interface for the RAID drives. It monitors and reports
the status of the RAID drives, the chassis fans, and the power supplies. It also controls
the individual RAID status LEDs and the front panel Power and Service LEDs. It is
mounted horizontally in the front of the unit, above the RAID drives. It provides a
front panel USB connection.
Refer to “SCSI interface board removal” on page 122 for procedures.