| Walt Mankowski on 6 Jan 2007 00:01:02 -0000 |
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At Wednesday night's meeting I asked for suggestions on mounting USB devices like flash drives. I thought I'd report back on how I made out. The problem seemed kind of tricky, because the device name the kernel uses can vary depending on whether any other USB devices are plugged in. I was getting tired of editing /etc/fstab every time I tried to mount it to change /dev/sdb1 to /dev/sdc1. Someone at the meeting suggested that I look at device IDs. That turned out to be exactly what I was looking for. I discovered that under /dev/disk the kernel puts four directories -- by-id/, by-label/, by-path/, and by-uuid/, each of which contains symlinks with symbolic names that point back to the raw device names they refer to. The by-label directory was the most useful for my purposes. Instead of /dev/sdb1 or /dev/sdc1, it lets me use the device name /dev/disk/by-id/usb-SanDisk_U3_Cruzer_Micro_0000060512013154-part1. That's a mouthful, but it has the big advantage of always being the same no matter which USB port it's using. Walt Attachment:
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