Date: Sat, 22 Apr 1995 22:28:14 -0400 From: Thomas David Rivers <ponds!rivers@dg-rtp.dg.com> To: freebsd-hackers@freefall.cdrom.com Subject: Interesting SCSI cdrom problem.. Message-ID: <199504230228.WAA28254@lakes>
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I have a NEC 3xP - which is/was their "personal" SCSI CD-ROM. It's nice enough and seems fast... However, I notice that when the disk spins down; from lack of an access in a few minutes; there doesn't seem to be anything I can do to spin it up again, except to umount the drive and re-mount it. Or - it's possible that the scenario is that if I mount the drive, then open the door (which you have to do so see if the drive is spinning) then re-close the door - that resets the drive, but isn't reflected in the "mount". What usually happens is that future accesses to the files (unless they were cached) causes I/O errors. (Well - I think I've empirically determined it's situation #2 - if you leave the CD in the drive, and wait - the drive does spin down. As long as you don't open the drive door, everything is fine. If you open, then close, the drive door - the mount is still present, and you get I/O errors.) - Dave Rivers -
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