Lucid boot interrupted by Buffer I/O error on device sr0

[joneall]

Sometimes -- only sometimes -- I can not get my Lucid system to boot. It reaches the blue Kubuntu window with 5 (I think) stars underneath and stops there. This is just after having displayed a string of messages like

jon-desktop kernel: [ 7.180351] end_request: I/O error, dev sr0, sector 128

There was a (music) Cd in one drive, so I removed that and the boot worked and here I am. But sometimes it works with the CD in the drive. My disks are both SATA disks, so I do not think it is the same problem someone else had with some sort of interference between IDE disks and CD recorders,

Looking in /var/log/syslog, I see many entries like this

jon-desktop kernel: [ 7.235921] Buffer I/O error on device sr0, logical block 32
Jul 12 12:37:02 jon-desktop kernel: [ 7.235962] Buffer I/O error on device sr0, logical block 33
Jul 12 12:37:02 jon-desktop kernel: [ 7.239281] sr 0:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Jul 12 12:37:02 jon-desktop kernel: [ 7.239288] sr 0:0:0:0: [sr0] Sense Key : Illegal Request [current]
Jul 12 12:37:02 jon-desktop kernel: [ 7.239295] sr 0:0:0:0: [sr0] Add. Sense: Illegal mode for this track
Jul 12 12:37:02 jon-desktop kernel: [ 7.239303] sr 0:0:0:0: [sr0] CDB: Read(10): 28 00 00 00 00 20 00 00 02 00
Jul 12 12:37:02 jon-desktop kernel: [ 7.239319] end_request: I/O error, dev sr0, sector 128

The lshw command gives

*-ide:0
description: IDE interface
product: 82801G (ICH7 Family) IDE Controller
vendor: Intel Corporation
physical id: 1f.1
bus info: pci@0000:00:1f.1
logical name: scsi0
version: 01
width: 32 bits
clock: 33MHz
capabilities: ide bus_master emulated
configuration: driver=ata_piix latency=0
resources: irq:18 ioport:1f0(size=8) ioport:3f6 ioport:170(size=8) ioport:376 ioport:f900(size=16)
*-cdrom:0
description: DVD-RAM writer
product: CDDVDW SH-S222A
vendor: TSSTcorp
physical id: 0.0.0
bus info: scsi@0:0.0.0
logical name: /dev/dvdrw
logical name: /dev/scd0
logical name: /dev/sr0
version: SB00
capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram
configuration: ansiversion=5 status=nodisc


Anyone have any ideas whatcould be going on?

Thanks in advance.

[askrieger]

Re: Lucid boot interrupted by Buffer I/O error on device sr0

This is just a guess. My guess is that, in order to install linux, at some point in the life of your machine, you set your BIOS so that, at power up, the system checks the CD reader for a disk. If it determines that there is a CD in the reader, it attempts to boot from that disk. If not, it goes on to boot from your first HD (or whatever is second in your boot order). Frankly, I'm amazed that it EVER boots up when you have a music CD in the drive.

[joneall]

Re: Lucid boot interrupted by Buffer I/O error on device sr0

This is just a guess. My guess is that, in order to install linux, at some point in the life of your machine, you set your BIOS so that, at power up, the system checks the CD reader for a disk. If it determines that there is a CD in the reader, it attempts to boot from that disk. If not, it goes on to boot from your first HD (or whatever is second in your boot order). Frankly, I'm amazed that it EVER boots up when you have a music CD in the drive.

I think you hit on something there. I just checked and, indeed, I had forgotten to put the hard disk as the preferred boot device. I changed that, booted and ... got the same problem. The second boot worked. So...

(1) This morning, I had the problem several times without any CD in either DVD reader (I have two). Sometimes it works (even with a music or game CD/DVD in a device), sometimes it does not..

(2) It seems to happen only when I boot the Kubuntu system on /dev/sdb. With the Kubuntu on /dev/sda, as well as with Windoze on /dev/sda/ I have never had the problem.

I am most concerned that I had the pb again after removing priority from the CD-ROM. I will later try several boots in a row to get some statistics on the matter.

In any case, thanks for your perspicacious input!

[joneall]

Re: Lucid boot interrupted by Buffer I/O error on device sr0

I just rebooted 7 times in a row. Kubuntu hung at the same spot 2 times out of 7. It should do better.

Any other ideas? One forum report found interference between his hard disk and his cd-rom, but they were both on the same ide bus. My disks are sata. Don't know about the cd-roms.

[askrieger]

Re: Lucid boot interrupted by Buffer I/O error on device sr0

I'm now thinking that you've got a hardware problem, but I am confused. What are /dev/sda and /dev/sdb? From the names, I suspect that they are IDE (or SATA) hard drives. Are they separate built in hardware devices, or are you plugging and unplugging your drive(s) cables? If you are plugging and unplugging cables, please be careful. The connectors are not designed for that. Pins bend, wires fray, solder joints break (at least, mine always used to).

[joneall]

Re: Lucid boot interrupted by Buffer I/O error on device sr0

Sorry, /dev/sda and /dev/sdb are my 2 SATA hard disks, inside the computer. They were installed by the assembler and I have not touched them. Haven't even opened the machine yet.

Since they are sata, I don't see why they should interfere with the HDs. One guy back in 2009 had such a pb, but with IDE disks.

I have windows and a backup kubuntu on sda and have never had a pb there, but then I don't boot it very much. The pb has only occurred -- intermittently -- on sdb.

I have to run a half-dozen or so boots on sda to test it a bit more.

Thanks for your continued interest.

[dibl]

Re: Lucid boot interrupted by Buffer I/O error on device sr0


I'm kind of guessing, like Al, that the IDE device (the optical drive), is somehow involved with this problem.

This:

jon-desktop kernel: [ 7.180351] end_request: I/O error, dev sr0, sector 128

and this:

Looking in /var/log/syslog, I see many entries like this

jon-desktop kernel: [ 7.235921] Buffer I/O error on device sr0, logical block 32
Jul 12 12:37:02 jon-desktop kernel: [ 7.235962] Buffer I/O error on device sr0, logical block 33
Jul 12 12:37:02 jon-desktop kernel: [ 7.239281] sr 0:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Jul 12 12:37:02 jon-desktop kernel: [ 7.239288] sr 0:0:0:0: [sr0] Sense Key : Illegal Request [current]
Jul 12 12:37:02 jon-desktop kernel: [ 7.239295] sr 0:0:0:0: [sr0] Add. Sense: Illegal mode for this track
Jul 12 12:37:02 jon-desktop kernel: [ 7.239303] sr 0:0:0:0: [sr0] CDB: Read(10): 28 00 00 00 00 20 00 00 02 00
Jul 12 12:37:02 jon-desktop kernel: [ 7.239319] end_request: I/O error, dev sr0, sector 128

and this:

*-cdrom:0
description: DVD-RAM writer
product: CDDVDW SH-S222A
vendor: TSSTcorp
physical id: 0.0.0
bus info: scsi@0:0.0.0
logical name: /dev/dvdrw
logical name: /dev/scd0
logical name: /dev/sr0
version: SB00
capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram
configuration: ansiversion=5 status=nodisc

all seem to point to that TSSTcorp optical drive. Is it possible to disconnect the data cable, temporarily, and try a few boots with the optical drive disconnected?