Taccess Posted January 23, 2018 Share Posted January 23, 2018 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) ? Quote Link to comment
JorgeB Posted January 23, 2018 Share Posted January 23, 2018 AFAIK dual path is for redundancy, and it needs to be supported also by the backplane Quote Link to comment
Fireball3 Posted January 23, 2018 Share Posted January 23, 2018 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. Quote Link to comment
Taccess Posted January 23, 2018 Author Share Posted January 23, 2018 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 ? Quote Link to comment
Taccess Posted January 23, 2018 Author Share Posted January 23, 2018 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. Quote Link to comment
JorgeB Posted January 23, 2018 Share Posted January 23, 2018 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. Quote Link to comment
Fireball3 Posted January 23, 2018 Share Posted January 23, 2018 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. Quote Link to comment
Taccess Posted January 23, 2018 Author Share Posted January 23, 2018 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 ? Quote Link to comment
JonathanM Posted January 23, 2018 Share Posted January 23, 2018 Just now, Taccess said: Thanks for the info, while I am here what is unRAID ? https://lime-technology.com/ Quote Link to comment
Taccess Posted January 23, 2018 Author Share Posted January 23, 2018 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 Quote Link to comment
Taccess Posted January 23, 2018 Author Share Posted January 23, 2018 Correction : I got my lsi card wrong I purchased the 9361-8i can I use this in unRAID ? Quote Link to comment
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