Can you try the following? mdadm --create --verbose /dev/md0 -l0 -n2 --chunk 4096 /dev/nvme0n1 /dev/nvme1n1
The modern SSD (As available in the I2/I3 instance types) and the HDD (As found in D2) have a native sector size of 4096 Bytes, and that matches sector size for Linux LVM and pages. I think you probably have a chunk size of 256, a write (or TRIM) of each 4K sector would be spread into 16 chunks, making each access of the SSD a partial native sector. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1756315 Title: fstrim and discard operations take too long to complete - Ubuntu 16.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-aws/+bug/1756315/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
