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



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.



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