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On Friday 4 August 2006 06:14, Meino Christian Cramer wrote: |
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> But: How can I distinguish both harddiscs? |
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On one of my system, I run a raid 1 array with two identical disks (hde |
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and hdg), and I have this (sorry for the line wraps): |
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[Fri Aug 04 11:38:50 root@bach ~]# ls -l /dev/disk/by-id/ |
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[cut] |
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lrwxrwxrwx 1 root root 9 Jul 20 10:50 |
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ata-Maxtor_6Y080L0_Y2CG9M5E -> ../../hde |
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lrwxrwxrwx 1 root root 9 Jul 20 10:50 |
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ata-Maxtor_6Y080L0_Y3J1HW3E -> ../../hdg |
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Those device names DO include the disk's serial number, and are (I |
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suppose) created by udev. So, just plug in each of your identical drives |
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and look at the devices which udev creates. Once you identify the exact |
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names (probably under /dev/disk/by-id), use those names to distinguish |
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between the drives wherever you need to. |
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The strange thing is that udev obviously knows the serial number of each |
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drive (udevinfo -q all -n /dev/sda *DOES* show the device's serial |
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number), but it seems that no file under /sys contains this information |
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(for hard disks, at least), so it looks like it's not possible to use a |
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regular udev rule to create different devices (but, as I said above, |
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seems that udev is somehow able to do that by itself - if somebody has |
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more info please tell). I could probably be missing something here. |
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-- |
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