Date: Sun, 09 Sep 2001 00:57:12 -0700 From: Farooq Mela <fmela0@sm.socccd.cc.ca.us> To: FreeBSD-Hackers@FreeBSD.ORG Cc: sos@FreeBSD.ORG Subject: Failure to fixate cd in burncd Message-ID: <3B9B20D8.5393D4E@sm.socccd.cc.ca.us>
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Hello,
Sometimes when I burn data CD's from ISO's at 12x speed like so:
# burncd -f /dev/acd1c -s 12 data file.iso fixate
The fixate fails, and I believe it is because the CD-R has not yet
spun down from the burn phase. The problem doesn't occur when the
burn is done at a lower speed. The fixate works perfectly if,
immediately after the 12x speed burn, I then do "burncd -f /dev/acd1c
-s 12 fixate," because then the CD-R has stopped doing the burning
phase. I don't know that much about ATA or anything, but I have
attached a patch for burncd (against -STABLE) which will perhaps fix
the problem (it does for me at least). It just retries the
CDRIOCCLOSEDISK ioctl (which is the ioctl that fails) a few times,
with pauses in between. Any thoughts?
BTW, don't EVER try mounting a CD that has an .iso image burned to it
but hasn't been fixated. There is a fatal kernel trap, and then
somewhere in the code that handles kernel traps, there is another
fatal trap, so there is a continuous barrage of kernel trap messages
and information; these go on indefinitely until you press a key.
--
farooq <fmela0@sm.socccd.cc.ca.us>
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--- /usr/src/usr.sbin/burncd/burncd.c Sat Mar 3 23:59:34 2001
+++ burncd.c Sun Sep 9 00:47:25 2001
@@ -118,9 +118,16 @@
for (arg = 0; arg < argc; arg++) {
if (!strcmp(argv[arg], "fixate")) {
+ int retries;
+
if (!quiet)
fprintf(stderr, "fixating CD, please wait..\n");
- if (ioctl(fd, CDRIOCCLOSEDISK, &multi) < 0)
+ for (retries = 5; retries; retries--) {
+ if (ioctl(fd, CDRIOCCLOSEDISK, &multi) == 0)
+ break;
+ usleep(100000);
+ }
+ if (retries == 0)
err(EX_IOERR, "ioctl(CDRIOCCLOSEDISK)");
break;
}
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