The Chenbro chassis runs fine with drives larger than 2TB. I have 8x3TB sitting in mine right now. I know of several others that also have these chassis with larger drives in and they have had no problems with them either. I think you may be getting confused with the early model Supermicro Expander Backplane which was only SAS1 capable and limited the drive size to 2TBI'm not familiar with the type A of Supermicro. The only thing that I'm worried is that the RM23212 will not support drives larger than 2tb.
I also use all SATA drives as well. So although some of my JBOD chassis have dual SAS expanders, with using SATA drives, I only utilize one of them.I will probably also be using sata drives. All of my current drives in my storage server are. I really don't think that I would be getting much benefit from SAS at the price premium.
Perhaps I will look into this further then. I would like to get all of my storage drives in there if I did this. I might just keep my OS drives in the server since I am running those off of a separate controller anyway.I understand your concerns. The thing I really like about disk shelves is let's assume it's upgrade time. With disk shelves in the mix, you only upgrade the host aka one machine and your disk shelves remain 100% intact and untouched.
So in the past when I had multiple servers I did one at a time start to finish. Now I just have one to do and disk shelves simply attach to the new updated host(s).
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I also leave my OS drive in the main chassis. In my current set up that's unRAID running off a thumbdrive on my host machine. I have a HBA on the host machine with external ports that connect to my JBOD's.Perhaps I will look into this further then. I would like to get all of my storage drives in there if I did this. I might just keep my OS drives in the server since I am running those off of a separate controller anyway.
I would need a case, a RAID controller with External ports, power supply, Fans (of course), and one of those jbod power connector thingies, a proper backplane, so on so forth. That could get pricy, and I would have to make sure everything was compatible.. I saw someone posting a case before that had a bunch of disk bays pointing upwards, maybe I should look to see if I can find something like that...
Great news. Thanks for confirming this.Someone lied to you. I have 8TB WD drives in mine.
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well I guess that I could start with an 12 slot chassis, build it and see how it goes, then get another and repeat when I need to go above 12 drives.I also leave my OS drive in the main chassis. In my current set up that's unRAID running off a thumbdrive on my host machine. I have a HBA on the host machine with external ports that connect to my JBOD's.
The chassis you refer to as disks pointing up are top load. As an example, I have some HGST 4U60's that have 60 hot swap bays per 4U chassis that gave up.
And ya this stuff can get expensive but what a lot of these posts talked about is the Chenbro RM23212 that comes with the (3) SAS2 backplanes for about $110. Toss in your $50-80 power supply, a $10 Supermicro power board, then connect it up to the external HBA in your host machine. So that set up I just mentioned is about $200 ready for hard drives assuming you already have a host machine with a HBA that has external ports.
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I assume your saying you would like to use the 847 as just a JBOD chassis? If so you'll just need to run cables out of the chassis to your SAS card in your main chassis such as 8087 from your backplanes to 8088 connected in the expansion slots. You'll also need some type of fan controller or the 847 will run fans at full speed which is insanely loud.I guess I don't even know what to ask the seller.
Just based on the description I would imagine it is a single 8087 off the main 24 bay backplane and a single 8087 off the rear backplane both having onboard expanders. Unless he changed them for some reason. I would confirm with the OP but that would be my best guess based on the limited info provided.Do you happen to know what that sas backplane would look like? would it have 9 8087 ports on it, or would it use some sort of an internal expander (this is where I get lost) with fewer ports?
If it is using 8087 connectors, and will work with my 9260-16i, I could just move my entire system into that box (for fewer overall boxes running and not having to route external cables.
Just based on the description I would imagine it is a single 8087 off the main 24 bay backplane and a single 8087 off the rear backplane both having onboard expanders. Unless he changed them for some reason. I would confirm with the OP but that would be my best guess based on the limited info provided.
If that's the case then it would take up 2 of the 4 physical ports or 8i of the internal 16i.
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Ya this community is pretty cool. You'll notice posts about super in depth clustered file systems someone is using at work to "has anyone ever used this cable?" And rarely does anyone make you feel stupid or like you don't belong no matter how simple or difficult the question may be.OK perfect. I'll draft an appropriate post on his this evening. I just didn't want to pollute is For sale thread with what many would consider me being foolishly ignorant to be trying to make such a purchase. I appreciate all you your (and eveyone elses) help on this. It is a new area for me and it has been difficult to distill all of this information into knowing what to purchase, and how to to it. This community is really wonderful, and the lack of trolls is remarkable this day and age!
Not sure how to check it, so it's running at whatever the default is (which I assume is SAS2). It has been stable thus far running 8 3tb Ultrastars.Nice to hear. I didn't see any specs on the signal speed but read some negative comments on other 8087-8087 cables about only running at SAS1 speeds. So I assume your getting full speeds out of the cable without connection/communication issues?
The monoprice cable is connected to an 8087 connector on the backplane and the 8088 connector is plugged into an LSI card on another machine. No i2c cables connected that I know of.Did you connect the backplane to the jbod board with an i2c cable or how does it work?