January 23, 20188 yr Hi I have a z820 ‘I have just purchased a 9281-8i. i am planning on ordering 8 x ST4000NM0025 . i would like so help understanding how I can use and the benefits of the dual ports on these sas drives. SAS Interface maximum instantaneous transfer rate 1200mb/s (dual port 2400mb/s) ?
January 23, 20188 yr AFAIK dual path is for redundancy, and it needs to be supported also by the backplane
January 23, 20188 yr I also fear that the controller you ordered is a full hardware RAID controller. It won't be possible to simply pass-through the drives to the unRAID OS. Like that, unRAID won't be able to manage the drives. Maybe if you set them up as JBOD but that is usually a painful and not very recommended procedure.
January 23, 20188 yr Author 9 minutes ago, Fireball3 said: I also fear that the controller you ordered is a full hardware RAID controller. It won't be possible to simply pass-through the drives to the unRAID OS. Like that, unRAID won't be able to manage the drives. Maybe if you set them up as JBOD but that is usually a painful and not very recommended procedure. I plan on setting up a raid 0 array . This will be used for my DAW sample libraries. i am not sure what you mean by passing through the drives to unRAID OS ?
January 23, 20188 yr Author I believe I need dual expander cards and MPIO. however that’s all I know as I have never owned sas drives and only started looking into what dual port is today. I still don’t have my head around it and even what it does and why when dual port is being used on a sas drive that the maximum instantaneous rate doubles an how that benifits.
January 23, 20188 yr It won't make any difference performance wise, no disk currently on the market can reach SATA3 speeds, let alone SAS3 speeds, and like Fireball3 pointed out a RAID controller is not recommend for unRAID, you'll want an HBA, e.g. LSI 9300-8i.
January 23, 20188 yr 29 minutes ago, Taccess said: I plan on setting up a raid 0 array i am not sure what you mean by passing through the drives to unRAID OS ? I was presuming you want to set up an unRAID machine since this is the unRAID forum.
January 23, 20188 yr Author 19 minutes ago, Fireball3 said: I was presuming you want to set up an unRAID machine since this is the unRAID forum. Thanks for the info, while I am here what is unRAID ?
January 23, 20188 yr Just now, Taccess said: Thanks for the info, while I am here what is unRAID ? https://lime-technology.com/
January 23, 20188 yr Author 55 minutes ago, jonathanm said: https://lime-technology.com/ Just watched the video and looks amazing. I will check it out more tomorrow , does raid 0 still multiply the read write speeds in unRAID ? What else should I know ? Never heard of this before ? thanks
January 23, 20188 yr Author Correction : I got my lsi card wrong I purchased the 9361-8i can I use this in unRAID ?
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