Remove the USB thumb drive from the system, wait a few seconds (10 or so) and plug it back in. Have a look (as root) at the /var/log.messages file by typing from the console or xterm session;
tail /var/log/messages
You should (hopefully) see something like;
Code:
Jan 22 12:24:26 Aspire5000 kernel: scsi 3:0:0:0: Direct-Access Kingston DataTraveler 2.0 6.16 PQ: 0 ANSI: 0 CCS
Jan 22 12:24:26 Aspire5000 kernel: SCSI device sdb: 1025023 512-byte hdwr sectors (525 MB)
Jan 22 12:24:26 Aspire5000 kernel: sdb: Write Protect is off
Jan 22 12:24:26 Aspire5000 kernel: sdb: assuming drive cache: write through
Jan 22 12:24:26 Aspire5000 kernel: SCSI device sdb: 1025023 512-byte hdwr sectors (525 MB)
Jan 22 12:24:26 Aspire5000 kernel: sdb: Write Protect is off
Jan 22 12:24:26 Aspire5000 kernel: sdb: assuming drive cache: write through
Jan 22 12:24:26 Aspire5000 kernel: sdb: sdb1
Jan 22 12:24:26 Aspire5000 kernel: sd 3:0:0:0: Attached scsi removable disk sdb
Jan 22 12:24:26 Aspire5000 kernel: sd 3:0:0:0: Attached scsi generic sg2 type 0
Use this information to mount the partition, for example; mount -t ext3 /dev/sdb1 /mnt
.