Why is Ubuntu's kernel 2.6 better than FC3's one?

[John Burton]

Timothy Ha wrote:

> This has been unanswered everywhere, both in RH Bugzilla and in the 
> UbuntuForums. Can somebody from development team look into this?
> [...snip...]
> Additional Comment #1
> <https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=127059#c1> From
> Timothy Ha on 2004-07-03 08:57 -------
>
> Nearly same problems with a Sarotech USB 2.0 HDD device.
>
> 1) WHEN I TURN ON THE USB EXTERNAL HDD:
>
> usb 4-3: new high speed USB device using address 2
> Initializing USB Mass Storage driver...
> scsi0 : SCSI emulation for USB Mass Storage devices
> Vendor: Model: Rev:
> Type: Direct-Access ANSI SCSI revision: 02
> Attached scsi generic sg0 at scsi0, channel 0, id 0, lun 0, type 0
> USB Mass Storage device found at 2
> usbcore: registered new driver usb-storage
> USB Mass Storage support registered.
> SCSI device sda: 241254721 512-byte hdwr sectors (123522 MB)
> sda: assuming drive cache: write through
> sda:
>
> At this step the computer seems to do nothing more. The red led on USB
> HDD is lighted. Some activity happening.
>
Hmmm... okay, so far, so good. Now, have you checked the logs to see if 
a "mount point" is created in "/media" ? You should see something like:

Dec  3 08:59:29 traveler kernel: USB Mass Storage support registered.
Dec  3 08:59:29 traveler kernel: SCSI device sda: 117210240 512-byte 
hdwr sectors (60012 MB)
Dec  3 08:59:29 traveler kernel: sda: assuming drive cache: write through
Dec  3 08:59:29 traveler kernel:  sda: sda1
Dec  3 08:59:29 traveler kernel: Attached scsi disk sda at scsi0, 
channel 0, id 0, lun 0
Dec  3 08:59:30 traveler fstab-sync[3799]: added mount point 
/media/usbdisk for /dev/sda1

Note the last line - fstab-async adds a mount point (/media/usbdisk) for 
the disk I just connected. The next thing I do is simply "mount 
/media/usbdisk" and I have access to my usb drive...

John


> 2) LSMOD shows
>
> # /sbin/lsmod
> Module Size Used by
> sd_mod 16472 2
> usb_storage 53576 1
> ehci_hcd 22916 0
> sg 27680 0
> scsi_mod 91984 3 sd_mod,usb_storage,sg
> vfat 9984 1
> fat 33600 1 vfat
> uhci_hcd 24472 0
> ext3 103656 3
> jbd 40728 1 ext3
> .....
>
> 3) NOTHING HAPPENING, UNTIL I TURN OFF THE USB DRIVE. DMESG SHOWS
> ERRORS LIKE:
>
> Buffer I/O error on device sda, logical block 56918292
> SCSI error : <0 0 0 0> return code = 0x70000
> end_request: I/O error, dev sda, sector 56918293
> Buffer I/O error on device sda, logical block 56918293
> SCSI error : <0 0 0 0> return code = 0x70000
> end_request: I/O error, dev sda, sector 56918294
> Buffer I/O error on device sda, logical block 56918294
> SCSI error : <0 0 0 0> return code = 0x70000
> end_request: I/O error, dev sda, sector 56918295
> Buffer I/O error on device sda, logical block 56918295
>
>> sda2
>
> Attached scsi disk sda at scsi0, channel 0, id 0, lun 0
> updfstab: Using deprecated /dev/sg mechanism instead of SG_IO on the
> actual device
> inserting floppy driver for 2.6.6-1.435
> usb 4-3: USB disconnect, address 2
>
>
> ------- Additional Comment #2
> <https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=127059#c2> From
> Timothy Ha on 2004-07-03 08:59 -------
>
> My HDD works for Fedora Core 1 and Windows XP with no problems. It has
> external power, not powered from USB bus.
>