RussellinSacto Posted August 27, 2015 Share Posted August 27, 2015 Hi Everyone, I'm brand new to Cache drives - bought a pair of SSDs to try it out. I successfully assigned them and then UnRaid offered to Format one of them - but I think it formatted them both (because they both have a "file system" on the below screencapture. My concern: The Cache2 drive does not appear to contribute any storage to the cache pool. How do I fix this? Thanks, Russell Link to comment
trurl Posted August 27, 2015 Share Posted August 27, 2015 It's a little confusing the way this is displayed. It has changed a little in 6.1 so it is slightly less confusing. You have a btrfs raid1 cache pool. The total available is 500GB, mirrored. btrfs disk usage calculator Link to comment
RussellinSacto Posted August 27, 2015 Author Share Posted August 27, 2015 Thanks Trurl... I'd prefer not to mirror these drives and instead have the full 1TB available. How do I change it? Thanks, Russell BTW, I am on 6.1. Link to comment
itimpi Posted August 27, 2015 Share Posted August 27, 2015 I'd prefer not to mirror these drives and instead have the full 1TB available. How do I change it? That is not (currently at least) supported by the unRAID GUI (not sure if it is possible if you work at the command line). You could always mount one of them as an additional drive outside unRAID. Not sure if this would be compatible with how you want to use these drives? I use this technique for having all my VM's hosted on a SSD mounted outside unRAID control. If you do this then the Unassigned Devices plugin can help with this. Note that both of these drives count against the attached devices limit on a license even if not assigned to unRAID. Link to comment
RussellinSacto Posted August 27, 2015 Author Share Posted August 27, 2015 I would like to use both drives to run VMs. I hoped to use a little of their space for Caching, but if I must choose one or the other - I'll use them strictly for VMs and forget caching. Where can I get more information to set this up? Thanks,. Russell P.S. Not concerned about the limit - I have a pro license. Link to comment
itimpi Posted August 27, 2015 Share Posted August 27, 2015 Where can I get more information to set this up? If you install the Unassigned Devices plugin then hopefully the GUI is reasonably intuitive. Link to comment
JonathanM Posted August 27, 2015 Share Posted August 27, 2015 I'd prefer not to mirror these drives and instead have the full 1TB available. How do I change it? That is not (currently at least) supported by the unRAID GUI (not sure if it is possible if you work at the command line). I don't have time to search, but I think Tom posted the correct balance command to use in the GUI to accomplish this. It defaults to RAID1, but you theoretically can balance the pool to RAID0 by changing the command in the window. Link to comment
trurl Posted August 27, 2015 Share Posted August 27, 2015 Where can I get more information to set this up? If you install the Unassigned Devices plugin then hopefully the GUI is reasonably intuitive. That plugin not yet compatible with 6.1 Link to comment
RussellinSacto Posted August 27, 2015 Author Share Posted August 27, 2015 This is over my head... But I'm trying to find the information I need. Is this the appropriate information to remove my hard disks from the cache for VMs? https://lime-technology.com/forum/index.php?topic=42100.msg400097#msg400097 I just set it to Raid0? I need this setting to persist. :-) I'm not sure. Russell Link to comment
JonathanM Posted August 28, 2015 Share Posted August 28, 2015 This is over my head... But I'm trying to find the information I need. Is this the appropriate information to remove my hard disks from the cache for VMs? https://lime-technology.com/forum/index.php?topic=42100.msg400097#msg400097 I just set it to Raid0? I need this setting to persist. :-) I'm not sure. Russell You found the post I remembered. Those are directions to change the cache pool to RAID0, not remove the drives from the pool. You will end up with a 500GB+500GB=1TB cache without failure protection. If you follow the directions, i.e. set the option to RAID0 and click balance, that will persist until you change the members of the cache pool. So, just don't add another drive to the cache pool after it's set up as a RAID0. If you want to remove the drives from the pool, it's a little more complicated if you want to save any data that's already there. The easiest thing to do is copy anything you want to save to an array drive, then unassign the drives from the cache slots. Where exactly do you want to end up? Link to comment
RussellinSacto Posted September 1, 2015 Author Share Posted September 1, 2015 Hi Jonathan, Thanks for following up. Regrettably, I have given up on VMs. I just can't get it all working right - I didn't have this solution, I couldn't get more than one or two of my USBs to work, and any tiny change required assistance from here. (Some details here: http://lime-technology.com/forum/index.php?topic=41652.0 Original needs here: http://lime-technology.com/forum/index.php?topic=42159.0 - Weebo and GaryCase seemed to have great advice I'm now following - VM just isn't what I need it to be) Instead, I'm going back to a separate Windows machine for my general use - and then keep my UnRaid machines as simple storage boxes. Hopefully they'll run a couple Dockers. :-) Thanks for your assistance, Russell Link to comment
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