Hi guys, I created a PReP partition in usb key and then did "dd" and something like that to configure yaboot on it. But the key point is that, when I boot power blade, there is not usb key in the bootable list. I mean, there are just: 1. - Ethernet ( loc=U788D.001.99DXC6K-P1-T7 ) 2. - Ethernet ( loc=U788D.001.99DXC6K-P1-T8 ) 3. - USB CD-ROM ( loc=U788D.001.99DXC6K-P1-T1-L1-L3 ) 4. 1 SCSI 36401 MB Harddisk, part=1 () ( loc=U788D.001.99DXC6K-P1-T10-L1-L0 ) My usb key is Kingston's DataTraveler 2GB. Then I change another Sandisk cruzer 2GB usb key, it shows as follows in the boot menu: 1. - Ethernet ( loc=U788D.001.99DXC6K-P1-T7 ) 2. - Ethernet ( loc=U788D.001.99DXC6K-P1-T8 ) 3. - USB CD-ROM ( loc=U788D.001.99DXC6K-P1-T1-L1-L3 ) 4. 1 SCSI 36401 MB Harddisk, part=1 () ( loc=U788D.001.99DXC6K-P1-T10-L1-L0 ) 5. - USB CD-ROM ( loc=U788D.001.99DXC6K-P1-T1-L1-L2-L1-L0 ) But this item 5 USB CD-ROM is simulated by Sandisk, not the actual usb key. I can't boot my server via item 5. Could IBM power blade, js 21, 8844 boot via usb key? If not, could you please provide official doc to prove it. Because I have to persuade my boss to give up it. -:) Any comment is appreciated. Thanks a lot in advanced. Kelvin. --------------------------------- ÑÅ»¢ÓÊÏ䣬ÄúµÄÖÕÉúÓÊÏ䣡