Centos 5.6 I have a 80 gig SATA usb drive connected in hub no-1 and a USB key in hub no-2 If I perform the following commands I get some results but there is no sdbXX appearance [root at localhost home]# lsusb Bus 001 Device 001: ID 0000:0000 T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 2 B: Alloc= 0/900 us ( 0%), #Int= 0, #Iso= 0 D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 P: Vendor=0000 ProdID=0000 Rev= 2.06 S: Manufacturer=Linux 2.6.18-238.el5 uhci_hcd S: Product=UHCI Host Controller S: SerialNumber=0000:00:07.2 C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub E: Ad=81(I) Atr=03(Int.) MxPS= 2 Ivl=255ms /proc/bus/usb/devices (END) [root at localhost home]# sfdisk /dev/sdb /dev/sdb: No such file or directory sfdisk: Fatal error: cannot find /dev/sdb [root at localhost home]# sg_map /dev/sg0 /dev/sda [root at localhost home]# fdisk -l Disk /dev/sda: 9132 MB, 9132374016 bytes 255 heads, 63 sectors/track, 1110 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/sda1 * 1 13 104391 83 Linux /dev/sda2 14 1110 8811652+ 8e Linux LVM [root at localhost home]# ls /dev/|grep hd cdrom-hda cdrw-hda cdwriter-hda dvd-hda dvdrw-hda dvdwriter-hda hda I googled a lot and found nothing that can point me directly to a solution. Can somebody point me a solution --- Michel Donais