3 Replies Latest reply on May 30, 2011 7:51 AM by Jim_Simon

    still unclear on RAID

    kirm99 Level 1

      I'll be shooting with a Sony EX1R - sometimes with a Nanoflash @ 100mbps - and outputing same. Maybe converting to NeoHD editing format in CS5 (would that be an advantage?)


      1) Pretty sure I'll need a RAID array - but what configuration? I was leaning toward RAID 5, but then saw that Harm called it a non-video array (?)


      2) and will it work with most new mother boards? or does it require a hardware card?


      3) also, interior or exterior RAID drives? is heat a problem?


      4) Plus I keep reading about Throughput - but not sure how to calculate my needs. I found some crazy formulas online - but is there another way?


      5) and would I include the scratch area inside the RAID array - or have a seperate HDD - and does that need to be able to handle a certain speed of data???


      6) finally, what color should we paint the bathroom? (ha - just kidding)

       

      this seems to be the last hurdle I need to jump before buying a new machine.  Thanks for your advice!

        • 1. Re: still unclear on RAID
          Harm Millaard Level 7

          1) Pretty sure I'll need a RAID array - but what configuration? I was leaning toward RAID 5, but then saw that Harm called it a non-video array (?)

           

          Raid 5 is better in high I/O situations, whereas Raid 3 is better in high transfer rates.  As long as the raid is not degraded, the differences are small and a raid 5 controller is usually less expensive than an Areca controller, which is needed for raid 3. But when one looses a single disk, the rebuilding of the array takes much longer on a raid 5 than on a raid 3, unless the parity disk on a raid3 is the one to go. If a data disk dies, a raid 5 requires reading and writing to all the disks in the array, a raid 3 needs to read from all disks but only write to a single disk. The rebuild overhead is much larger with raid 5.

           

          2) and will it work with most new mother boards? or does it require a hardware card?

           

          Yes, but with a severe performance penalty, so effectively you need a hardware card for parity raids.

           

          3) also, interior or exterior RAID drives? is heat a problem?

           

          Interior is much easier and heat is no problem. I have 17 disks internally and never had any problem with heat, despite overclocking.

           

          4) Plus I keep reading about Throughput - but not sure how to calculate my needs. I found some crazy formulas online - but is there another way?

           

          If all you do is single track editing, throughput is irrelevant. If you often have large numbers of tracks using hi-res material, throughput requirements will sky-rocket. There is no simple answer, but generally, the higher the better. Throughput is often the bottleneck in modern systems.

           

          Look here: http://forums.adobe.com/thread/662972

          • 2. Re: still unclear on RAID
            brorob

            Thanks for the info.

             

            I'm doing a lot of layering and effects, so you think I'd be okay with a hardware-card controlled, internal RAID 5 (4 disks)?

             

            and then a seperate HDD for a scratch disk? I guess I'm not sure what I'd need to play back 100MBPS HD video? would that play from any HDD?

             

            thanks again!

            • 3. Re: still unclear on RAID
              Jim_Simon Level 9
              Pretty sure I'll need a RAID array

               

              You may not.  100Mbps is also the data rate of DVCPRO HD.  I've not had any issues with this working off a single modern drive.

               

              If you need 10 layers at the same time, it might be an issue.  But for many editing purposes, a single drive might work just fine.