topic mbraligned linux vms result in Partition 1 not ending on cylinder boundary in ONTAP Discussions

mbraligned linux vms result in Partition 1 not ending on cylinder boundary

eleenchiang — Thu, 05 Jun 2025 07:23:20 GMT

From what I understand, running mbralign shifts all the data to new fs boundaries, so seeing this warning/error when looking at the output of a 'fdisk -l' almost seems expected. My test VM is still able to boot normally with this error, but I was wondering if anyone else has seen this and had negative impacts to their VM?

Thanks

Re: mbraligned linux vms result in Partition 1 not ending on cylinder boundary

amiller_1 — Tue, 06 Oct 2009 13:25:41 GMT

Screenshot by any chance? Or the output from "mount"? (am curious about the file system in question)

Re: mbraligned linux vms result in Partition 1 not ending on cylinder boundary

eleenchiang — Tue, 06 Oct 2009 19:49:52 GMT

Re: mbraligned linux vms result in Partition 1 not ending on cylinder boundary

eleenchiang — Tue, 06 Oct 2009 19:51:48 GMT

It's an ext3 filesystem

Re: mbraligned linux vms result in Partition 1 not ending on cylinder boundary

forgette — Wed, 14 Oct 2009 16:38:06 GMT

eleenchiang,

Your inclination was correct. The cylinder boundary warning isn't valid for virtual disks (or virtual luns). There is/was a advantage to taking cylinder and track boundaries into consideration when the geometry described a physical disk, but there is none in this case.

Hope this helps.

Re: mbraligned linux vms result in Partition 1 not ending on cylinder boundary

eleenchiang — Thu, 15 Oct 2009 00:14:08 GMT

Thanks forgette for the reassurance. I will boldly move forward and align all of my linux vms without as much concern now.