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<meta http-equiv="Content-Type" content="text/html; charset=Windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-family: Calibri, sans-serif; "><div>Hello,</div><div><br></div><div>I am currently using lustre 1.8. I am relatively new with lustre. At the moment, I am trying to move an mds/mgs system from one disk to another.</div><div><br></div><div>I used the version of tar modified by whamcloud in order to dump and restore the filesytem. I used mkfs.lustre to create a new mds/mgs filesystem on my /dev/sdc. I then I mounted the old mds at /mnt/mdsold and the new mds at /mnt/mdsnew using filesystem type "ldiskfs"</div><div><br></div><div>I replicated the filesystem with the following command sequence:</div><div><br></div><div>cd /mnt/mdsold && tar —sparse —xattrs –cf - . | (cd /mnt/mdsnew && tar —sparse —xattrs –xvpf -) </div><div><br></div><div>However, look at the output of df:</div><div><div><br></div><div>Filesystem Size Used Avail Use% Mounted on</div></div><div><div>/dev/sdd 2.3T 7.9G 2.1T 1% /mnt/mdsold</div><div>/dev/sdc 815G 3.1G 765G 1% /mnt/mdsnew</div></div><div><br></div><div><br></div><div>Now, why would the new filesystem use 3.1 gigabytes when the old one takes up 7.9G?</div><div><br></div><div>=======================</div><div><br></div><div>Side note question: I have used the same version of tar to get a file-level backup of my mds: </div><div><br></div><div>tar —xattrs —sparse –cf - . >sdd.tar</div><div><br></div><div>The file created was 61 gigabytes in size.</div><div><br></div><div><div><div>Filesystem Size Used Avail Use% Mounted on</div></div><div><div>/dev/sdd 2.3T 7.9G 2.1T 1% /mnt/mdsold</div></div></div><div><br></div><div>Why is this? Do the attributes take up extra space?</div><div><br></div><div>Thanks!</div></body></html>