How Many Data Drives in Pro Version?


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I have the Pro version (5.0b14), and am getting close to the drive limit of 20. I understand the actual release version will support 24 drives - is that 24 total, including the parity and cache drives, or is it 24 data drives, plus parity & cache?

 

Thanks for any feedback, Carl.

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As noted, the current Pro implementation 24 array drives (23 data plus parity) and one cache drive.

 

Once btrfs caching is enabled (originally planned for v5.0, but will now be in a future release -- probably relatively soon), the Pro version will support 25 storage devices, which may be assigned as you like => so you could have 25 data drives;  24 data drives with a parity drive;  or fewer data drives with several drives assigned to a btrfs cache pool.

 

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As noted, the current Pro implementation 24 array drives (23 data plus parity) and one cache drive.

 

Once btrfs caching is enabled (originally planned for v5.0, but will now be in a future release -- probably relatively soon), the Pro version will support 25 storage devices, which may be assigned as you like => so you could have 25 data drives;  24 data drives with a parity drive;  or fewer data drives with several drives assigned to a btrfs cache pool.

 

We probably shouldn't focus on btrfs coming to unRAID too soon. Given that it hasn't even been seen in beta or RC form, it's probably a long way off given Lime Tech's history. Let's not give anyone false hope or let someone buy unRAID thinking a certain feature is just around the corner.

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Didn't mean to imply any near-term availability ... just noted that it WAS a feature planned for v5.0; and Tom is still planning to add it to a relatively near-term release.    "Relatively near-term" may not, of course, mean the same thing to Tom that others may expect  :)

People exploring unRAID for the first time, perhaps prior to trying/buying, could easily be mislead. Until Tom either officially announces an impending beta release or a beta is actually released, we probably should pretend it doesn't exist. It could be weeks, months, or years. Newcomers won't realize this though.

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Agree -- I was simply noting the difference between the answer to this question now vs. when the cache pool is implemented => primarily to be sure there were no expectations of the # of drives increasing with the pool ... the total stays the same; you actually lose data drives if you choose to use multiple drives in the pool.

 

It's certainly true that the Limetech release history tends to imply it could be a fairly long time before a release with the pool is actually available ... although I do know that Tom is planning for this to be nowhere near as long as the last release cycle, since he's moving towards a 64-bit v6 release.  I wouldn't speculate on whether that will be weeks or months; but it's safe to say it won't be years  :)

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