I don't know if it can be a starting point to find correct strategy, but for example (tested on Fedora 14 but should be similar in recent rh el distro):
sda = hard disk sdb = usb key that is inside at this moment [root@tekkaman block]# pwd /sys/class/block [root@tekkaman block]# ls sda alignment_offset discard_alignment queue sda2 size uevent bdi ext_range range sda3 slaves capability holders removable sda4 stat dev inflight ro sda5 subsystem device power sda1 sda6 trace [root@tekkaman block]# ls sdb alignment_offset device inflight removable slaves uevent bdi discard_alignment power ro stat capability ext_range queue sdb1 subsystem dev holders range size trace [root@tekkaman block]# cat sda/removable 0 [root@tekkaman block]# cat sdb/removable 1 I don't know if you have an hot plug disk if the "removable" special file can contain 1 also for hard disks, but I don't think so I remember to have used this content to differentiate sda or sdb for install, because I had to install on HP and Dell servers. In HP there is /dev/cciss/c0d0 in Dell tipically /dev/sda and I put my kickstart on usb key / floppy that actually were mapped to an image used by iLO/Drac. If I find those kickstart I could share. In the mean time you can try... I used that information in the pre section Or eventually you can check other flags inside the directories... HIH, Gianluca _______________________________________________ rhelv6-list mailing list rhelv6-list@redhat.com https://www.redhat.com/mailman/listinfo/rhelv6-list