Red Hat Bugzilla – Bug 166400
USB drives failures with SCSI drives present.
Last modified: 2007-11-30 17:07:08 EST
Description of problem:
Version-Release number of selected component (if applicable):
Can't view data base - kills mozilla RH 7.1
RH 7.1, RH 7.3 RH 9.0 RH 2.0 enterprise server evaluation down load.
Requires a SCSI disk system. Works well with out any SCSI devices attached but
dog slow 3 Gig in 1/2 hr. 1.7 GH Athelon with 1 G ram.
Steps to Reproduce:
1.System must have a scsi device attached with id set to 1
2.plug in usb hard disk.
3.tail /var/log/messages - gives scsi device such as sda or our system sde
5.create file system
7. mount disk to /backup
8. It looks good from here.
9 vi /proc/scsi/scsi
you will see that the real hardware is under SCSI0 ID 00
usb device is SCSI1 ID 00
This looks ok from here.
cd to /backup - OK
df 1G available used 4
Try to use disk - as in cp -Rp /usr/local Back up some arbitrary directory
First 4K copies and device quits. You cannot recover by unplugging as it just
creates a new logical drive. You have to unplug the usb device, reboot.
At this point you can mount the device and you get a warning but it works, you
can see the small directory it created.
If you repeat this without any SCSI devices connected then it works with RH 9.0
but is dog slow 3 G file transfer in 1/2 hr on a fast mach.
There is something wrong with the external USB stuff an that id does not
recognize other devices that are attached.
SCSI does not recognize that there are two SCSI devices as SCSI0 and SCSI1 both
with an ID of 00 and can't differentiate between them.
We are evaluating Linux Enterprise server to replace our Linux 7.1 that has
served us well.and we would like to use the USB devices to create backups for
off site storage.
You're evaluating RHEL2.1, and not RHEL3 or RHEL4? I ask because the current
version setting is confusing, and because this bug is likely to be fixed in
RHEL3, and definitely fixed in RHEL4.
Is there any reason that you're not evaluating our most recent RHEL product?
Larry, please try this for RHEL3 or RHEL4 and let us know if you still
have the problem. If not, please close this as NOTABUG. If so, please
correct the product version. (I've tentatively set it to 3.)
This bug is filed against RHEL 3, which is in maintenance phase.
During the maintenance phase, only security errata and select mission
critical bug fixes will be released for enterprise products. Since
this bug does not meet that criteria, it is now being closed.
For more information of the RHEL errata support policy, please visit:
If you feel this bug is indeed mission critical, please contact your
support representative. You may be asked to provide detailed
information on how this bug is affecting you.