RAID SATA SPEED INPROVEMENT?
Posted on 2006-07-11
I have a customer that has a requirement to have as a fast as possible system disk running Windows XP. He wants to keep the cost down as much as possible so we have already been through the motions of upgrades here and there (ie. SCSI RAID array with SCSI CONTROLLER is too expensive, a new motheboard supporting SCSI or SATA nativly is not an option... etc)
SO have come to the conclusion that a SCSI RAID array would be a speed enhancement for the read/write operations on hit disk using Photoship and 3D modelling software - he already has a gig of memory and will be adding more to this so please do not answer with "More Memory" or "Faster Processor" - i only require thoughts / opinions and abuse about the idead of a sata raid array.
Does anyone agree with my idea?
I was thinking of putting a PCI SATA raid controller card into the machine and then using this to connect up the SATA disks. Then setting up the RAID array to be either RAID 0, 3, 5 or 0+1.
Fault tolerance is not really that important as the system can be ghosted once built and the image put on DVD for restore if the OS went down and the actual files will be saved on another large SATA / IDE disk that is not in the array.
Raid 0 seems a good idea at the moment as:
1) it only requires two disks
2) Easy to implement and
3) If i wanted to improve performance even more i might be able to install two RAID controllers and stripe the data over two controllers with one disk attached to each.
Raid 5 would give me the best read rate but medium write rate
Raid 3 is extremely fast read/write and need 3 disks min, however can be fairly complex and not entirely sure if a PCI SATA controller would support this
Raid 0+1 would be excellent speed but would require 4 disk to be installed and would be expensive - again not sure if you can get a PCI SATA controller that does 0+1
Thoughts / comments / abuse greatly appreciated.
Any links to specific PCI SATA RAID controller cards would be handy also.