Panayiotis Karabassis wrote:
I have an external usb 2.0 LG hard disk. It is part of an md array
which is in turn part of an lvm array. The strange thing is that while
the drive is in use, it will suddenly change device nodes, for example
from /dev/sda to /dev/sdb. This will cause the md driver to mark it as
faulty. This is very disruptive. Why is this happening and how to
solve it?
Might be it is better to write a special udev rule and name this usb
drive with some non-standard way
like /dev/usb_drive1 for example
for example these are the rules for 2x sas drives on my workstation
/etc/udev/rules.d/61-persistent-storage.rules
KERNEL=="sd?", SUBSYSTEM=="block" , ATTR{removable}=="0" ,
ENV{ID_BUS}=="scsi", ATTRS{vendor}=="HITACHI " SYMLINK+="sasdrive%n"
KERNEL=="sd?", SUBSYSTEM=="block" , ATTR{removable}=="0" ,
ENV{ID_BUS}=="scsi", ATTRS{vendor}=="FUJITSU " SYMLINK+="sasdrive2%n
so they appear as /dev/sasdrive
and /dev/sasdrive2
http://reactivated.net/writing_udev_rules.html
Regards ,
Alex
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