Last week I wrote about a computer issue between my Apple desktop PC and an external CD/DVD drive (also an Apple product). I appreciated blogger feedback that a possible solution would be found after Apple reviewed files uploaded for analysis.
The very good news is that this week, there has been a determination of what caused the problem —The PC would go into restart mode when a certain CD was inserted into the drive, but not when the CD/DVD unit was connected without a disk.
A callback from Apple support this week determined that the issue was caused by a Universal Disk Format (UDF). Rather than try and explain it, there's info here. Thankfully, the external drive and the PC are both OK. This was verified when a music CD was inserted and the tracks were recognized and read. (So all is good with both devices.)
As it was explained to me, the computer was trying to access information on the inserted disk, then came to a bad area and went into shutdown mode. The term used referred to a "panic kernel." (Yes, it does sound ominous.) As alarming as the term sounds, Apple support explained that it's a self-protection mode for the computer.
Images on the CD had been backed up on a Windows desktop PC and that was presented as a "possible" reason for the conflict. Thankfully, the bulk of the CDs in this project have already been transferred onto several external hard drives.
Ironically, the same CD could be read on other Apple computers in our household: Grenville's desktop and a notebook PC. That being the case, I was advised to use an alternate computer to read the "problem" CD. Hopefully, this will work; however, if the CD (or others) don't read on another computer, the (unwelcome) advice was to discard it. Disappointing to learn as there's more CDs to go through to complete this project.
The good news is that copying CD images onto external hard drives is much "safer" in terms of failures, corruption and long-term storage. That said, I'm working on this project the next month or so until completion, then CDs are destroyed and trashed.
There's much speculation on how long CDs/DVDs "last." Several years ago, National Public Radio (NPR) aired this program on All Things Considered. It was interesting to read that there's "no average life span...as there's no average CD."
How do you store digital images — computer, CD/DVD media, external hard drive(s)?