Installation guide

TARGA 3000 Configuration Cookbook
8 Disk Arrays
8.1 Image Quality and Data Rates
Preserving image quality is probably the most important feature TARGA 3000. By processing all video in
uncompressed mode, there is no loss of visual information. If that weren't enough, the 3000 can capture and
process RGB (4:4:4:4), creating video streams over 40 MBps in bandwidth, which can in this case exceed
144 MBps during real-time transitions. All this is supported by the system's audio-video hard drive
subsystem, and it's ability to provide data at a predictable pace. Consequently, we recommend the latest
technology in data-delivery, whose advances will no doubt outpace the frequency which this cookbook will
be updated.
8.2 Certified Hard Drive Controllers
BRAND MODEL SCSI
TYPE
PCI
TYPE
COMPATIBILITY NOTES
ADAPTEC 39160 U160 x 2 64 bit Times out on SCSIBENCH32 when more
than 3 drives are accessed at a time
ADAPTEC 29160 U160 64 bit Times out on SCSIBENCH32 when more
than 3 drives are accessed at a time
ADAPTEC 3950UB U2W x 2 64 bit
ADAPTEC 2940U2W U2W 32 bit
ATTO UL2D U2W x 2 64 bit Compatibility problems with Compaq SP750
when SCSI BIOS is enabled.
ATTO UL3D U160 x 2 64 bit Compatibility problems with Compaq SP750
when SCSI BIOS is enabled.
IWILL SIDE-DU280 U2W x 2 64 bit Requires internal to external SCSI adapter
for dual channel external connection.
IWILL SIDE-DU3160 U160 x 2 64 bit Requires internal to external SCSI adapter
for dual channel external connection.
LSI LOGIC SYM53C1010 U160x 2 64 bit Integrated on some Tyan MBs
LSI LOGIC SYM53C896 U2W x 2 32 bit Integrated on Tyan Thunder 2500
QLOGIC QLA2160 U160 x 2 64 bit SCSI BIOS will not show up sometimes on
Compaq SP750.
ADVANSYS ASB3950U160 U160 x 2 64 bit Requires internal to external SCSI adapter
for dual channel external connection.
ADVANSYS ASB3950U2W U160 x 2 32 bit Requires internal to external SCSI adapter
for dual channel external connection.
Dual Channel adapters are highly recommended when working with YUV or RGB codecs.
8.3 SCSI Bus types and potential bandwidth:
SCSI UltraWide transfers up to 40 MBps (from controller cache to drive cache), with a 16-bit wide data path.
Also referred to as "Fast Wide SCSI-2". Not recommended for data rates above DV or MPEG, as real-world
memory-to-disk transfer rates average 12 MBps for each drive.
SCSI Ultra2 transfers up to 80 MBps (from controller cache to drive cache), with a 16-bit wide data path.
Also referred to as "Fast Wide SCSI-3", "LVD or Low-Voltage Differential". Often available in dual channel
models, possibly increasing throughput capacity (pending tests will report the effectiveness of multi-channel
configurations). Recommended for most data rates, with perhaps the exception of RGB. Real-world
memory-to-disk transfer rates can average 18 MBps for each drive.