I also get this bug on a newly installed 12.4 with Seagate ST2000DM001 drives. Reported misalignment is 3072 bytes. Both drives work and pass all diagnostics, but average seek time is 14.2 to 14.4 ms.
based on question 184477 I ran sudo fdisk -l; mount; echo; lsb_release -a; uname -a and got WARNING: GPT (GUID Partition Table) detected on '/dev/sdc'! The util fdisk doesn't support GPT. Use GNU Parted. Disk /dev/sdc: 2000.4 GB, 2000398934016 bytes 255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sdc1 1 3907029167 1953514583+ ee GPT Partition 1 does not start on physical sector boundary. WARNING: GPT (GUID Partition Table) detected on '/dev/sdb'! The util fdisk doesn't support GPT. Use GNU Parted. Disk /dev/sdb: 2000.4 GB, 2000398934016 bytes 255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sdb1 1 3907029167 1953514583+ ee GPT Partition 1 does not start on physical sector boundary. /dev/sda1 on / type ext4 (rw,errors=remount-ro) proc on /proc type proc (rw,noexec,nosuid,nodev) sysfs on /sys type sysfs (rw,noexec,nosuid,nodev) none on /sys/fs/fuse/connections type fusectl (rw) none on /sys/kernel/debug type debugfs (rw) none on /sys/kernel/security type securityfs (rw) udev on /dev type devtmpfs (rw,mode=0755) devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620) tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755) none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880) none on /run/shm type tmpfs (rw,nosuid,nodev) gvfs-fuse-daemon on /home/nas/.gvfs type fuse.gvfs-fuse-daemon (rw,nosuid,nodev,user=nas) /dev/sdc1 on /media/2TB type ext4 (rw,nosuid,nodev,uhelper=udisks) /dev/sdb1 on /media/2TA type ext4 (rw,nosuid,nodev,uhelper=udisks) No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 12.04 LTS Release: 12.04 Codename: precise Linux nas 3.2.0-27-generic-pae #43-Ubuntu SMP Fri Jul 6 15:06:05 UTC 2012 i686 i686 i386 GNU/Linux -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-disk-utility in Ubuntu. https://bugs.launchpad.net/bugs/742123 Title: creates a misaligned partition Status in “gnome-disk-utility” package in Ubuntu: Confirmed Bug description: Binary package hint: gnome-disk-utility I installed a new 750GB disk in the expansion bay of my X201, and then used Maverick's disk-utility to create a GUID Partition Table. I then made a new 250GB partition at the start of the disk. Next time I opened disk-utility, I saw a warning: "the partition is misaligned by 3072 bytes. This may result in very poor performance. Repartitioning is suggested." I then deleted the partition, created a new one, and found the exact same problem occurs. 1- If disk-utility is smart enough to know this partition layout will cause poor performance, it shouldn't create it! 2- Does this actually cause poor performance on modern hardware/kernels? ProblemType: Bug DistroRelease: Ubuntu 10.10 Package: gnome-disk-utility 2.30.1-2 ProcVersionSignature: Ubuntu 2.6.35-28.50-generic 2.6.35.11 Uname: Linux 2.6.35-28-generic x86_64 Architecture: amd64 Date: Fri Mar 25 09:48:06 2011 EcryptfsInUse: Yes ExecutablePath: /usr/lib/gnome-disk-utility/gdu-notification-daemon InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007) ProcEnviron: PATH=(custom, user) LANG=en_AU.utf8 SHELL=/bin/zsh SourcePackage: gnome-disk-utility To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-disk-utility/+bug/742123/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
