robert 0 Posted May 10, 2010 I need something like 250mb/sec writing. RAID0 could do that, but if one hdd fails, whole archieve is lost. RAID5 - low performance. How to solve this? Pre-motion recording CANNOT be disabled in NUOO, thats where a problem lies. 10 Arecont AV3100, 3.1mpix, 8fps. Share this post Link to post Share on other sites
RonW 0 Posted May 10, 2010 Have you considered using RAID 10? Since you haven't mentioned anything about the pc/workstation/server that you're potentially using it makes suggesting any definitive solutions other than use fast drives and change the RAID level from 5 to the 10 the only suggestion that readily comes to mind. Share this post Link to post Share on other sites
hardwired 0 Posted May 10, 2010 I've had good luck with the Areca RAID cards, the 1231ML will easily run 800+ Mbps throughput in RAID5 or 6. I have also used their SAS 1680IX card to run two external bays of sixteen 1.5TB drives in RAID6, and that benchmarked at 950+Mbps. Share this post Link to post Share on other sites
robert 0 Posted May 10, 2010 [quote="hardwired"]I've had good luck with the Areca RAID cards, the 1231ML will easily run 800+ Mbps throughput in RAID5 or 6. I have also used their SAS 1680IX card to run two external bays of sixteen 1.5TB drives in RAID6, and that benchmarked at 950+Mbps.[/quote] Does this mean that HDD throughput sums up at RAID 5 and 6? From what I read today, only in RAID0 this happens. Share this post Link to post Share on other sites
hardwired 0 Posted May 10, 2010 RAID5/6 does suffer compared to the performance of RAID0/10, but can still meet your needs, without needing the larger amount of drives, and providing redundancy. I have our office server in RAID10, using four 1TB drives, and it's quite fast, and redundant... but you only get 1TB of storage space out of it. Here's a review of the Areca controller on a 8 drive array http://www.tweaktown.com/reviews/3051/areca_arc_1680x_pcie_eight_channel_external_sata_sas_raid_controller/index.html , I found higher performance on my 32 drive array, so it does appear that the drive performance is summed somewhat, even in RAID5/6. Share this post Link to post Share on other sites
robert 0 Posted May 11, 2010 Have you considered using RAID 10? Since you haven't mentioned anything about the pc/workstation/server that you're potentially using it makes suggesting any definitive solutions other than use fast drives and change the RAID level from 5 to the 10 the only suggestion that readily comes to mind. RAID 10 is raid1 speed and raid0 mirroring combined? So, if I need 10TB for storage and it would be RAID10, then I will need 20TB total. Am I right? Share this post Link to post Share on other sites
hardwired 0 Posted May 11, 2010 That's right, RAID10 is drives mirrored in RAID1, and then striped together in RAID0. You can also get higher throughput with RAID50 or 60, which stripes multiple RAID5 or 6 arrays in RAID0 between them, with less disks necessary than RAID10. Are you going to be using a separate RAID controller card, or are you trying to use the motherboard capabilities? The software RAID provided by motherboards is much more limited than a controller card would be. Share this post Link to post Share on other sites
robert 0 Posted May 11, 2010 Are you going to be using a separate RAID controller card, or are you trying to use the motherboard capabilities? The software RAID provided by motherboards is much more limited than a controller card would be. Looking at hardware Intel card. Share this post Link to post Share on other sites
