Hi,

I am trying to set up a CentOS 4 machine with various iSCSI mounts for Oracle, but devices keep on moving around, causing the mounts to fail while called by the sd[a-f] names.

We thought about using labels, but, as some of the partitions do not use EXT3, that was discarded, so we thought about using udev and by-id.

The problem is that udev does not seem to create the by-id folder or any files within it, while the by-path all get created. The rules file, 51-by-id.rules contains details for the both of them, but the by-id do not get detected, at least the logs don't indicate so.

The current contents of the rules file is as follows:

KERNEL="dasd*[!0-9]", PROGRAM="/sbin/dasd_id", SYMLINK="disk/by-id/ccw-%c" KERNEL="dasd*[0-9]", PROGRAM="/sbin/dasd_id", SYMLINK="disk/by-id/ccw-%c-part%n" SYMLINK="disk/by-id/scsi-%c" SYMLINK="disk/by-id/scsi-%c-part%n" KERNEL="sd*", PROGRAM="/sbin/path_id", SYMLINK="disk/by-path/%c" KERNEL="hd*", PROGRAM="/sbin/path_id", SYMLINK="disk/by-path/%c" KERNEL="dasd*", PROGRAM="/sbin/path_id", SYMLINK="disk/by-path/%c" KERNEL="sd*", PROGRAM="/sbin/scsi_id", SYMLINK="disk/by-id/scsi-%c"

In case someone hits the same problem, the solution is to change a line in the /etc/scsi_id.config file from "options=-b" to "options=-g" and it will then start working.

(Sent it to the list so people can do a search if they find the same problem).

Gabriel

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