Hello,
I'm trying to identify a problem in my RAID setup.
I've setup a software RAID 0 using 8 x 1 TB 7,200 Samsung F1 drives, 32MB cache.
I'm interesting in video editing and working with uncompressed streams of HD (Quicktime or Image sequences). These need roughly 250MB/s
When I measure the speed of my Raid using HDD testing software like Sandra, it comes in at about 260MB/s
My question is, how do I improve this speed? Add new drives?
What is the limitation? Is it my CPU, or my RAM speed?
Should I be using my hardware raid card (I have a 5 port hardware raid -- so could have a 5TB RAID 0)? Will I see any improvement with hardware, over software?
I get pretty good results with certain things (e.g. copying a file from a USB drive to the raid is 11 times faster when compared to copying to the boot drive -- 5 seconds versus 55 seconds for the same file from a USB stick).
However, I'm not getting the performance I would expect when attempting playback fo tiff/dpx sequences, or other uncompressed video files, which is surprising, so I've started to try to isolate where the bottleneck is.
I've posted questions elsewhere with specific questions about the RAM and the CPUs... so just wondering if any kind and smart readers of the RAID sections would have any answers for me, specific to the RAID setup?
System specs:
S5000XVN Dual Mobo
2 x quad core 1.6ghz processors: E5310 quad core (8 cores)
8TB Samsung F1 drives, in raid 0 config
320GB Samsung F1 boot drive
16GB Fully buffered ram, PC2-5300F DDR2-666
Nvidia Quadro FX 4800 (1.5GB)
Core speed: 1596.1 mhz
Bus speed: 265.9 mhz
Rated FSB: 1063.7 mhz
DRAM freq: 332.4
FSBRAM: 4:5
HDD benchmark test on a file copy test gives me:
Size: 95828114
Time: 739 ms
Transfer Rate: 123.666 MB/s
On a create file bench test:
Size: 50331648 bytes
Time: 377 ms
Transfer Rate: 127.321 MB/s
On a read file bench test:
Size: 95828114 bytes
Time: 149 ms
Transfer Rate: 613.348 MB/s
Any thoughts or suggestions would be most welcome.
THANKS
Jack
I'm trying to identify a problem in my RAID setup.
I've setup a software RAID 0 using 8 x 1 TB 7,200 Samsung F1 drives, 32MB cache.
I'm interesting in video editing and working with uncompressed streams of HD (Quicktime or Image sequences). These need roughly 250MB/s
When I measure the speed of my Raid using HDD testing software like Sandra, it comes in at about 260MB/s
My question is, how do I improve this speed? Add new drives?
What is the limitation? Is it my CPU, or my RAM speed?
Should I be using my hardware raid card (I have a 5 port hardware raid -- so could have a 5TB RAID 0)? Will I see any improvement with hardware, over software?
I get pretty good results with certain things (e.g. copying a file from a USB drive to the raid is 11 times faster when compared to copying to the boot drive -- 5 seconds versus 55 seconds for the same file from a USB stick).
However, I'm not getting the performance I would expect when attempting playback fo tiff/dpx sequences, or other uncompressed video files, which is surprising, so I've started to try to isolate where the bottleneck is.
I've posted questions elsewhere with specific questions about the RAM and the CPUs... so just wondering if any kind and smart readers of the RAID sections would have any answers for me, specific to the RAID setup?
System specs:
S5000XVN Dual Mobo
2 x quad core 1.6ghz processors: E5310 quad core (8 cores)
8TB Samsung F1 drives, in raid 0 config
320GB Samsung F1 boot drive
16GB Fully buffered ram, PC2-5300F DDR2-666
Nvidia Quadro FX 4800 (1.5GB)
Core speed: 1596.1 mhz
Bus speed: 265.9 mhz
Rated FSB: 1063.7 mhz
DRAM freq: 332.4
FSBRAM: 4:5
HDD benchmark test on a file copy test gives me:
Size: 95828114
Time: 739 ms
Transfer Rate: 123.666 MB/s
On a create file bench test:
Size: 50331648 bytes
Time: 377 ms
Transfer Rate: 127.321 MB/s
On a read file bench test:
Size: 95828114 bytes
Time: 149 ms
Transfer Rate: 613.348 MB/s
Any thoughts or suggestions would be most welcome.
THANKS
Jack