Michael W Lucas Mar 6

Hey #freebsd #bhyve users!

I'm trying to test draid virtually for #openzfsmastery, because nobody's gonna give me a shelf of 60 disks to play with. I set everything up like:

disk35_name="disk35"
disk35_type="ahci-hd"
disk35_dev="sparse-zvol"

Seems that if I have 35 ahci-hd entries, disk0 through disk34, bhyve and freebsd works. At disk35, the host panics on boot.

Is this expected with bhyve? Or does FreeBSD need a special tweak with 36 disks?

Show threadMichael W Lucas 1d ago

Finally getting back to my 72-disk draid bhyve VM for #openzfsmastery.

Turns out that setting ahci_device_limit="8" in the vm-bhyve config let it boot just fine.

Thank you everyone for your suggestions, but especially @dch for this one!

Show threadPete Keen1d ago
@mwl @dch seventy two disks? Not bad.
Show threadMichael W Lucas 1d ago

@zrail @dch they're sparse zvols in one vm.

It's not like I have the space for that kind of shelf, that many disks, or a sensible amount of data. But it will let me produce a well-caveated discussion of draid for the book.

Show threadRick Owens1d ago
@mwl @zrail @dch
So, no Backblaze-style storage pod? Or DIY 5-hub-tiers, 70-90 drive USB monstrosity? Well, shucks, there you go being all reasonable and such.  ​
Show threadMichael W Lucas 1d ago

@rowens @zrail @dch

see my earlier toot about my office lacking enough power to run the heater and printer simultaneously 

Show threadGarrett Wollman
@mwl @rowens @zrail @dch So the 60-drive chassis that we just retired wouldn't be to useful to you even after scrounging ebay for the right caddies to plug drives in... (It's super frustrating that 60 is bigger than most of our users would like and smaller than most of our vendors want to sell -- and I can't fit 104-drive enclosures in our cabinets.)
Mar 16 at 6:48pmWeb
Show threadMichael W Lucas 1d ago

@wollman @rowens @zrail @dch ha! Thanks, but no. I appreciate the thought, though.

(also, the thought of getting that up the stairs to my office.. ugh, I'm old!)