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On Apr 27, 2023, at 02:12, Ramiro Alba Queipo <<a href="mailto:ramiro.alba@upc.edu" class="">ramiro.alba@upc.edu</a>> wrote:<br class="">
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<div dir="ltr" class="">Hi everybody,
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<div class="">I have lustre 2.15.0 using Oracle on servers and Ubuntu 20.04 at clients. I have one MDT on a raid 1 SSD and the two disk have failed, so all the data is apparently lost. </div>
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<div class="">- Is there a remote posibility to access data on OSSTs without MDT?</div>
<div class="">- When I started this system I tried to backup MDT data without succes. I there any procedure to backup data which I got, but also to recover it which I did not achieve?</div>
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<div class="">Any help/suggestion es very welcomed</div>
<div class="">Thanks in advance.</div>
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<div class="">Regards</div>
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<div>Depending on the file layout used, the files on the OSTs are "just files", if you can mount the OSTs as type ldiskfs (or ZFS if that is the way you configured it). The default file layout is one OST stripe per file, so you could read those files, and
the UID/GID/timestamps should be correct, but there will not be any filenames associated with the files.</div>
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<div>Regards, Andreas</div>
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<div>Andreas Dilger</div>
<div>Lustre Principal Architect</div>
<div>Whamcloud</div>
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