hello! well i am not really an expert but on the page
there was an intro that helped me quite a lot (thanx a lot eric!
) you can also have a look which slot was used by the command dmesg:
[4331776.608000] usb 5-2: USB disconnect, address 3
[4331779.024000] usb 5-2: new high speed USB device using ehci_hcd and address 4
[4331779.103000] scsi1 : SCSI emulation for USB Mass Storage devices
[4331779.105000] usb-storage: device found at 4
[4331779.105000] usb-storage: waiting for device to settle before scanning
[4331784.106000] Vendor: SanDisk Model: Cruzer Micro Rev: 0.1
[4331784.106000] Type: Direct-Access ANSI SCSI revision: 02
[4331784.109000] SCSI device sda: 501759 512-byte hdwr sectors (257 MB)
[4331784.110000] sda: Write Protect is off
[4331784.110000] sda: Mode Sense: 03 00 00 00
[4331784.110000] sda: assuming drive cache: write through
[4331784.114000] SCSI device sda: 501759 512-byte hdwr sectors (257 MB)
[4331784.115000] sda: Write Protect is off
[4331784.115000] sda: Mode Sense: 03 00 00 00
[4331784.115000] sda: assuming drive cache: write through
[4331784.115000] /dev/scsi/host1/bus0/target0/lun0: p1
[4331784.125000] Attached scsi removable disk sda at scsi1, channel 0, id 0, lun 0
[4331784.133000] usb-storage: device scan complete
[4331784.701000] FAT: utf8 is not a recommended IO charset for FAT filesystems, filesystem will be case sensitive!
the "sda:" entries tell you which device was used; sda(1) here (only one partition on my usb-stick
hope that helps!