Ext USB drive - Daisy-chaining or Second USB port

[Anne]

We are using 2 LaCie 500 GB Quadra drives (USB, firewire 400 and firewire 800).
The OS is RHEL5.

I plugged the first drive into the first USB port, created an ext3 filesystem, mounted it as /dev/sdc1, and wrote to the drive.

Then I plugged the second drive into the second USB port and powered the drive on. /dev was not updated with sdd or sdd1.

These are the devices in /dev:

crw------- 1 root root 442, 2054 Mar 14 16:25 usbdev2.7_ep00
crw------- 1 root root 442, 2054 Mar 14 16:25 usbdev2.7_ep01
crw------- 1 root root 442, 2054 Mar 14 16:25 usbdev2.7_ep81
crw------- 1 root root 21, 2 Mar 14 16:25 sg2
brw-r----- 1 root disk 8, 32 Mar 14 16:25 sdc
brw-r----- 1 root disk 8, 33 Mar 14 17:37 sdc1
crw-rw-rw- 1 root tty 5, 0 Mar 15 13:49 tty
crw-rw-rw- 1 root tty 5, 2 Mar 15 14:37 ptmx

Is there a way to make RHEL5 recognize the second USB port?

Thanks in advance for any help.

[Brian1]

I would not see why it does not see the second port. Is this port located right by the first one?
If you plug the other drive in first in the first port does it show up?

After plugging both in run command ' dmesg ' and see what it says. Post info.

Brian

[Anne]

Thanks for the quick reply Brian!

Just plugged in the second drive to the second USB port, and it worked fine. This is the dmesg:

usb 2-4: new high speed USB device using ehci_hcd and address 8
usb 2-4: configuration #1 chosen from 1 choice
scsi10 : SCSI emulation for USB Mass Storage devices
usb-storage: device found
at 8
usb-storage: waiting for device to settle before scanning
Vendor: Ext Hard Model: Disk Rev:
Type: Direct-Access ANSI SCSI revision: 04
SCSI device sdd: 976773168 512-byte hdwr sectors (500108 MB)
sdd: Write Protect is off
sdd: Mode Sense: 10 00 00 00
sdd: assuming drive cache: write through
SCSI device sdd: 976773168 512-byte hdwr sectors (500108 MB)
sdd: Write Protect is off
sdd: Mode Sense: 10 00 00 00
sdd: assuming drive cache: write through
sdd: sdd1
sd 10:0:0:0: Attached scsi disk sdd
sd 10:0:0:0: Attached scsi generic sg3 type 0
usb-storage: device scan complete

Thanks again.

[Brian1]

So now it works?
USB and Hal and udev can be flakey. Some have made this change and fix their issue. Might help you.
http://forums.fedoraforum.org/showth...314#post977314

Brian