Grass Valley K2 Media Client System Guide v.3.3 - Manual (Page 111)

June 9, 2009 K2 Media Client System Guide 111
Chapter
4
Managing Internal Storage
Topics in this chapter include the following:
• “About the K2 Media Client internal storage system”
• “Using Storage Utility”
About the K2 Media Client internal storage system
SDA-00, SD-00, and HD-00 models are available with internal media storage. This
makes the internal storage K2 Media Client a self-contained, stand-alone unit, with
no external devices for storage, audio, or video connections required.
The storage system on an internal storage K2 Media Client includes the following:
RAID drives — There are slots for twelve RAID drives, located behind the fan
module in the front of the unit. Two drives are configured as a RAID 1 pair, or LUN.
This LUN is the system drive. The remainder of the drives are for media storage.
Media drives are available in five drive and ten drive options. Media drives can be
configured as RAID 0 or RAID 1. Media data is written or “striped” across media
drives in a continuous fashion, which makes them a “stripe group”. This media stripe
group appears as the V: drive to the Windows operating system.
SCSI controller adapter — This is a PCI board installed in the rear of the chassis. It
provides the SCSI controller functionality for the internal RAID disks. Both system
and media data require this RAID controller functionality, as both are stored on the
internal RAID disks.
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.
RAID 1 — Drives configured as RAID 1 provide redundancy. The two drives that
make up the system disk must be RAID 1. Media drives can be RAID 1 or RAID 0.
The two disks in a RAID 1 LUN are redundant partners. Any single disk in a LUN
can fail and disk access can continue. When a disk fails, error messages in the
AppCenter StatusPane or in NetCentral inform you of the problem. You can then
replace the failed disk. The data is rebuilt on the replacement disk and redundancy is
restored.
RAID 0 — Media drives configured as RAID 0 offer no redundancy. If any single
RAID 0 media drive fails, all data is lost on all media drives.