-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Sean McGlynn wrote: > Hello, > > > > I did an fdisk -l to review my partition table (see results below), and > found four entries that end with "Disk /dev/dm-X doesn't contain a valid > partition table." I don't recall seeing this in the past, so I believe > it is something new. Later kernels include dm devices in the list of partitions in proc, so fdisk will attempt to scan them for partition tables. It's not harmful, just noise. > I recently began using kernel 2.6.21.1, up from 2.6.9-42. I don't know > if perhaps this had some effect, or if the entries are normal and I just > never noticed them. If you don't like it & you've not configured anything to use /dev/dm-* devices directly (instead of /dev/mapper/* or /dev/<volgroup>/* or whatever) then you can reconfigure udev to not create the dm-* nodes. - From memory, you need to comment out the rule that begins "KERNEL="dm-[0-9]*" in /etc/udev/rules.d/50-udev.rules, or, for newer udevs you can add ignore_device: KERNEL=="dm-[0-9]*", ACTION=="add", OPTIONS+="ignore_device" > > > What led me here is that sar -d output includes four entries for hard > drives (dev253 entries) when there are only three on my system. Fdisk > is reporting four DM devices, so I'm thinking there is some correlation, > but I don't know what. Those "dev253" entries are your device-mapper devices. Take a look at /dev/dm-* with ls -l and you will see that the major number is 253. Kind regards, Bryn. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (GNU/Linux) Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org iD8DBQFGUayT6YSQoMYUY94RAqJKAJ9dFJtaRg3fONo7kLOkDezcS/FizwCcDwFj 2McvW5Wl+zudmUZDO2aE1fQ= =NHOE -----END PGP SIGNATURE----- _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
