Messages in this thread | | | Date | Mon, 14 Jan 2002 19:46:47 -0800 (PST) | From | David Dyck <> | Subject | 2.5.2 / IDE cdrom_read_intr: data underrun / end_request: I/O error |
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I'm still getting data underrun errors using 2.5.2 that don't occur using 2.4.18-pre3.
Linux dd 2.5.2 #1 Mon Jan 14 19:02:09 PST 2002 i686
here's a section of dmesg output
VFS: Disk change detected on device ide1(22,0) ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: changing to secondary root hdc: cdrom_read_intr: data underrun (4294967256 blocks) end_request: I/O error, dev 16:00, sector 299300 hdc: cdrom_read_intr: data underrun (4294967260 blocks) end_request: I/O error, dev 16:00, sector 299304
the blocks number is 'interesting' in that it is either negative or really massive, not something that would seem to be appropriate for the cdrom driver.
dd:dcd$ dmesg | perl -ne 'printf "%x\n", $1 if /data underrun.*?(\d+) blocks/ ' | sort | uniq -c | head 2 ffffff40 2 ffffff44 2 ffffff48 2 ffffff4c 2 ffffff50 2 ffffff54 2 ffffff58 2 ffffff5c 2 ffffff60 2 ffffff64 dd:dcd$ dmesg | perl -ne 'printf "%x\n", $1 if /data underrun.*?(\d+) blocks/ ' | sort | uniq -c | tail 4 ffffffd8 4 ffffffdc 4 ffffffe0 4 ffffffe4 4 ffffffe8 4 ffffffec 4 fffffff0 4 fffffff4 4 fffffff8 4 fffffffc
On Sat, 12 Jan 2002 at 08:37 -0800, David Dyck <dcd@tc.fluke.com> wrote:
> On Fri, 11 Jan 2002 at 18:55 -0800, David Dyck <dcd@tc.fluke.com> wrote: > > I had been testing 2.5.2-pre11 and earlier, but hadn't looked at > reading from my cdrom for a while. Yesterday I created examined several > large cdrom sets that had been readable earlier and they read partially > but get read errors. These same cdroms can be read reliable on > 2.4.18-pre3 using the same hardware, and are readable on other > PC's runing older kernels. > > Has anyone else seen cdrom read errors with 2.5.2-pre* kernels? > > Using 2.5.2-pre11 > > # mount /cdrom && md5sum /cdrom/* > md5sum: /cdrom/dcd-c.tar.gz: I/O error > md5sum: /cdrom/dcd-d.tar.gz: I/O error > > > An example of some of the messages were > > ide1: BM-DMA at 0xffa8-0xffaf, BIOS settings: hdc:DMA, hdd:pio > hdc: NEC CD-ROM DRIVE:28B, ATAPI CD/DVD-ROM drive > hdc: ATAPI 32X CD-ROM drive, 256kB Cache > > > VFS: Disk change detected on device ide1(22,0) > ISO 9660 Extensions: Microsoft Joliet Level 3 > ISOFS: changing to secondary root > hdc: cdrom_read_intr: data underrun (4294967256 blocks) > end_request: I/O error, dev 16:00, sector 299300 > hdc: cdrom_read_intr: data underrun (4294967260 blocks) > end_request: I/O error, dev 16:00, sector 299304 > > errors repeated with sector and blocks increasing by 4 > repeating 118 times > > > using 2.4.18-pre3 I get no errors
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