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From: Sam <sah@softcardsystems.com>
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cc: John-Mark Gurney <gurney_j@resnet.uoregon.edu>
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Subject: Re: fdisk/geom, AoE 5.2.1 
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> Please be aware that we have _three_ I/O operations under 5.x and
> later:  BIO_READ, BIO_WRITE and BIO_DELETE.  Just return EOPNOTSUPP
> for BIO_DELETE.

I was filtering out anything but R/W before I got there.  Thanks for
the tip on EOPNOTSUPP, though.  I was returning EIO.

Sam