sar: Use /sys/dev/block/major:minor links to determine devices real name.

sar: Use /sys/dev/block/major:minor links to determine devices real name.

Now use /sys/dev/block/major:minor links to determine devices real name.
This is used as the first option now, before using sysstat.ioconf
configuration file.

Mail from Peter Schiffer (pschiffe@redhat.com) 20/06/2012:

I am sending you a patch which is looking into
/sys/dev/block/major:minor link to determine the device name. This
should work for any device, but I let it as the last option when
determining devname. What do you think?