-----Original Message----- From: redhat-list-bounces@xxxxxxxxxx [mailto:redhat-list-bounces@xxxxxxxxxx] On Behalf Of Michael Scully Sent: Thursday, March 05, 2009 12:50 PM To: 'General Red Hat Linux discussion list' Subject: USB hard drives Greetings: I have been making use of USB hard drives for the last few years, instead of tape drives, for removable storage kept off site. When you plug one in, Linux sees them as a /dev/sdX raw hard drive, and I can partition them and format them for ext3 filesystems. This works well. However, when you introduce multiple drives on the same system, there seems to be no way to fix which device node the kernel will see it as. It's more first come, first serve. The first one attached is /dev/sdb (the main system hard drive array is /dev/sda), and an additional one is /dev/sdc, etc., etc. My problem is that when reboot remotely, I may now see this in a different order than before. If two drives are attached to the USB controller, Linux assigns them in an order I can't control. Since my backup scripts are doing different things to different drives (one is a small self-powered portable to off-site, one is a terabyte beast that does small data snapshots nightly), I'm potentially hitting the wrong devices if the machine gets rebooted. Is there any way to control this device assignment order? I'm not talking about the mount points, but the actual /dev node itself. Scully ------------------------- udev can create specific device names based on what disk you plug in. Rob Marti -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
