I have it running on two machines now that needed big RAID 10s: # uname -rv 5.4.0-72-generic #80+TEST1896578v20210504b1-Ubuntu SMP Tue May 4 00:30:36 UTC 202 # df -h /opt/raid Filesystem Size Used Avail Use% Mounted on /dev/md0 30T 208G 29T 1% /opt/raid # cat /proc/mdstat Personalities : [raid10] md0 : active raid10 nvme7n1[7] nvme6n1[6] nvme5n1[5] nvme4n1[4] nvme3n1[3] nvme2n1[2] nvme1n1[1] nvme0n1[0] 31255576576 blocks super 1.2 512K chunks 2 near-copies [8/8] [UUUUUUUU] [>....................] resync = 0.1% (48777600/31255576576) finish=2514.8min speed=206813K/sec bitmap: 233/233 pages [932KB], 65536KB chunk
FWIW the mkfs.xfs took ~1 minute across 8x8TB NVMe disks with this patched kernel. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1896578 Title: raid10: Block discard is very slow, causing severe delays for mkfs and fstrim operations To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1896578/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs