Date: Tue, 24 Sep 2002 14:15:27 -0700 From: "Sean Hamilton" <sh@planetquake.com> To: <hackers@freebsd.org> Subject: READ_BIG - ILLEGAL REQUEST at very end of CD Message-ID: <003a01c2640f$817cc500$911de8d8@slugabed.org>
next in thread | raw e-mail | index | archive | help
Greetings, I'm creating ISO images of CDs as advised by the handbook, like so: # dd if=/dev/acd0c of=blah.iso bs=2k At the very end of many CDs, dd states "acd0: Input/output error" and the kernel says: acd0: READ_BIG - ILLEGAL REQUEST asc=0x64 ascq=0x00 error=0x04 The .iso seems okay (I can make it into a vnode and mount it without trouble.) I can mount the CD and recursively cat every file, so I don't think it's bad media. Is this just an alignment issue, then? READ_BIG expecting 16 blocks or somesuch? Harmless? Is the tail end of my .iso getting thrown away? thanks, sh atapci0: <VIA 82C686 ATA66 controller> port 0xd800-0xd80f at device 4.1 on pci0 ata0: at 0x1f0 irq 14 on atapci0 ata1: at 0x170 irq 15 on atapci0 atapci1: <Promise ATA100 controller> port 0x8800-0x883f,0x9000-0x9003,0x9400-0x9407,0x9800-0x9803,0xa000-0xa007 mem 0xe4800000-0xe481ffff irq 11 at device 17.0 on pci0 ata2: at 0xa000 on atapci1 ata3: at 0x9400 on atapci1 ad4: 38172MB <MAXTOR 6L040J2> [77557/16/63] at ata2-master UDMA100 acd0: CD-RW <LITE-ON LTR-32123S> at ata0-master UDMA33 # atacontrol mode 0 Master = UDMA33 /* 40 pin cable. UDMA33 cdrom. */ Slave = ??? # atacontrol mode 1 Master = ??? Slave = ??? # atacontrol mode 2 Master = UDMA100 Slave = ??? # atacontrol mode 3 Master = ??? Slave = ??? To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?003a01c2640f$817cc500$911de8d8>