Computer RAID for maximum write speed?
April 17, 2013 5:32 PM Subscribe
I have somewhat of an unusual computer requirement: I need to be able to write data to disk at more than 1 gigabyte per second. Can you help me make this happen?
We are trying to run an Andor Zyla camera at it's full speed. At full speed, this particular camera puts out 1.1 GB/sec of data and we would like to be able to record to disk at that speed. The vendor recommends four soild state drives in RAID 0, which we have, but the highest continual write speed we've been able to achieve is about 950 MB/sec, which is not quite fast enough.
We have an Intel RMS25PB080 RAID card and four 240 GB Intel 520 series SSDs. On paper it looks like it should be capable of the speeds we need but it's not quite there, and I've been unable to find much documentation at all about how to optimize a RAID for sequential write performance. So far we've found that having write caching on in Windows is critical, and that there are minor effects from changing the RAID from write-back to write-through mode. We're testing the write speed using CrystalDiskMark, writing 4 GB at a time.
Do you have any ideas as to what we should try testing in the RAID configuration options? Or other things we should try? The PC is a dual quad-core Xeon (E5 2643) with 32 GB 1600 MHz RAM.