Date: Mon, 15 Aug 2005 12:01:00 +0200 From: Jeremie Le Hen <jeremie@le-hen.org> To: freebsd-current@FreeBSD.org Subject: mounting device acd0t01 Message-ID: <20050815100100.GJ1597@obiwan.tataz.chchile.org>
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Hi,
I was trying to understand what was residing on an unnamed CD-ROM,
and it leads me to run the following command :
%%%
mount_cd9660 /dev/acd0t01 /cdrom
%%%
I obtained such a device once I have used cdcontrol(8) to try playing
the CD-ROM. BTW, isn't it possible to make these devices appear
immediately when the CD-ROM is inserted and remove them when the
CD-ROM is removed ? I don't know how this works internaly, but I'm
pretty sure the CD-ROM drive triggers an interruption for this kind
of actions.
Apart from this, this generated the following panic. Is is resolvable ?
%%%
panic: wrong offset 32768 for sectorsize 2352
[...]
panic()
g_io_request() at g_io_request+0xbb
g_vfs_strategy() at g_vfs_strategy+0x71
breadn() at breadn+0x141
bread() at bread+0x4c
cd9660_mount() at cd9660_mount+0x568
vfs_domount() at vfs_domount+0x667
vfs_donmount() at vfs_donmount+0x107
kernel_mount() at kernel_mount+0x7e
cd9660_cmount() at cd9660_cmount+0x1cd
mount() at mount+1e6
syscall()
Xint0x80_syscall()
--- syscall (1, FreeBSD ELF32, mount), eip = 0x36759097, esp = 0xbfbf123c, ebp = 0xbfbf1708 ---
%%%
I didn't do a dump, it is easily reproducible.
My sources are dating from 2004.07.24, but I don't think this is very
relevant for this bug.
Regards,
--
Jeremie Le Hen
< jeremie at le-hen dot org >< ttz at chchile dot org >
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