Re: bin/49510: gpt(8) fails w/o drvctl and breaks sysinst

[John Nemeth <jnemeth%cue.bc.ca@localhost>]

On Dec 30,  5:00am, Masao Uebayashi wrote:
}
} The following reply was made to PR bin/49510; it has been noted by GNATS.
} 
} From: Masao Uebayashi <uebayasi%gmail.com@localhost>
} To: gnats-bugs%netbsd.org@localhost
} Cc: 
} Subject: Re: bin/49510: gpt(8) fails w/o drvctl and breaks sysinst
} Date: Tue, 30 Dec 2014 13:59:08 +0900
} 
}  On Tue, Dec 30, 2014 at 6:03 AM, Christos Zoulas <christos%zoulas.com@localhost> wrote:
}  > Consider stat'ing /dev/nrst0. Do you really want it to return the
}  > size?
}  
}  I'd expect it to return the physical disk size in bytes.

     That's a tape, not a disk.  And, if you say you want the
capacity, how are you going to determine it?

}  > Or /dev/rcd0a, what's the size? Is it the capacity? Or the
}  > current amount of data written? What if it's unformatted? Or even
}  > on regular disks, the size can be iffy... If you return sectors *
}  > secperunit, are you sure you can write that many bytes (what about
}  > bad sectors)?
}  
}  I'd expect it to return the physical partition size in bytes, no
}  matter if it's impossible to write that many bytes.

     For a disk, I would agree.  A CD though is different.  Do you
return the full capacity, or the amount currently.  How do you
handle a CD-RW versus a CD-R?  For the latter, is the result
different if it's blank?

}-- End of excerpt from Masao Uebayashi