My ex2-ultra has flagged a bad disk

My ex2-ultra has flagged a bad disk
I looked for the WD40EFRX disk but I can’t find
Can I replace one disk with WD40EFZX
Thanks

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Hi @landesm,

Have you opened a Support Case? If not opened, for more information, please contact the WD Technical Support team for the best assistance and troubleshooting:
https://support-en.wd.com/app/ask