Disks Will Fail – VSAN Doesn’t!

I was building my lab with VSAN backed storage – because I did not have a compatible RAID card I grouped the disks as a RAID-0 and presented it to VSAN. It worked and worked well – VSAN saw one big disk of about 1.6 TB (Had three disks worth 550GB each).

I was advised that it was a bad idea – because if the data got striped by the RAID controller and if one disk goes bad – VSAN now is stuck with missing and corrupted disk.

The proper way to do this was to have a RAID-0 on per disk and present all these individual disk volumes to VSAN to participate in a disk group. I went back and did that and boy am I glad that I did.

Today this happened

vsan-fail

The fix was easy – Just highlight the disk and click on actions to remove the disk from the disk group. Depending on the failure you might be able to recover the data vsan-fail2

Thanks to Luke Huckaba – @thephuck for pointing it out in my lab which saved me hours of work later.

Now time to setup SPBM to avoid multiple failures 😀

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