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start [2019/11/26 23:16] Dan Williams |
start [2020/06/11 20:00] Ira Weiny [Filesystems] |
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$ mkfs.xfs -f -m reflink=0 /dev/pmem0p2 | $ mkfs.xfs -f -m reflink=0 /dev/pmem0p2 | ||
$ mkfs.btrfs -f /dev/pmem0p3 | $ mkfs.btrfs -f /dev/pmem0p3 | ||
- | $ mount -o dax /dev/pmem0p1 /mnt/ext4-pmem0 | + | $ mount [dax_mount_options] /dev/pmem0p1 /mnt/ext4-pmem0 |
- | $ mount -o dax /dev/pmem0p2 /mnt/xfs-pmem0 | + | $ mount [dax_mount_options] /dev/pmem0p2 /mnt/xfs-pmem0 |
$ mount /dev/pmem0p3 /mnt/btrfs-pmem0 | $ mount /dev/pmem0p3 /mnt/btrfs-pmem0 | ||
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/dev/pmem0p3 4.3G 17M 4.1G 1% /mnt/btrfs-pmem0 | /dev/pmem0p3 4.3G 17M 4.1G 1% /mnt/btrfs-pmem0 | ||
</code> | </code> | ||
+ | |||
+ | Where **[dax_mount_options]** depends on the kernel support you have and the desired behavior. **For kernel version less than 5.8 the legacy '-o dax' option must be used.** In 5.8 new mount options were introduced. See [[fs_mount_options|fs_mount_options]] for details. | ||
Check the kernel log to ensure the DAX mount option was honored; mount does not print this information. Example failures: | Check the kernel log to ensure the DAX mount option was honored; mount does not print this information. Example failures: |