On Sat, Aug 1, 2015 at 3:34 PM, Robert Nichols <rnicholsNOSPAM at comcast.net> wrote:> On 08/01/2015 12:05 PM, Chris Murphy wrote: >> >> parted fs resize is deprecated. >> http://savannah.gnu.org/forum/forum.php?forum_id=6837 >> parted fs move can only move a partition into free space >> https://www.gnu.org/software/parted/manual/html_node/move.html >> >> The thing to do here is use gparted live or Fedora live media and >> yum/dnf install gparted. It has a move/resize option that will do what >> the OP wants. > > > The problem with gparted is that it works only in units of megabytes. > There is no way to move a partition to a particular sector or, for > that matter, do much of anything _exactly_.I'm not sure why granularity finer than 1MiB is necessary. But setting that aside, with a rotational drive with 4KiB sectors, you're better off with 1MiB alignment than not being 4KiB aligned at all. Depending on the drive and workload misalignment can cause a brutally bad performance hit. And if it doesn't then I wouldn't worry about changing anything. -- Chris Murphy
Chris Murphy wrote:> On Sat, Aug 1, 2015 at 3:34 PM, Robert Nichols > <rnicholsNOSPAM at comcast.net> wrote: >> On 08/01/2015 12:05 PM, Chris Murphy wrote: >>> parted fs resize is deprecated. >>> http://savannah.gnu.org/forum/forum.php?forum_id=6837 >>> parted fs move can only move a partition into free space >>> https://www.gnu.org/software/parted/manual/html_node/move.html >>> >>> The thing to do here is use gparted live or Fedora live media and >>> yum/dnf install gparted. It has a move/resize option that will do what >>> the OP wants. >> >> The problem with gparted is that it works only in units of megabytes. >> There is no way to move a partition to a particular sector or, for >> that matter, do much of anything _exactly_. > I'm not sure why granularity finer than 1MiB is necessary. But setting > that aside, with a rotational drive with 4KiB sectors, you're better > off with 1MiB alignment than not being 4KiB aligned at all. Depending > on the drive and workload misalignment can cause a brutally bad > performance hit. And if it doesn't then I wouldn't worry about > changing anything. >Thanks everyone. That's the advice I need. The partition is ext4. I'll copy it to other media and rearrange the partitions and copy it back. Ken -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.
Am 02.08.2015 um 19:12 schrieb Ken Smith <kens at kensnet.org>:> Chris Murphy wrote: >> On Sat, Aug 1, 2015 at 3:34 PM, Robert Nichols >> <rnicholsNOSPAM at comcast.net> wrote: >>> On 08/01/2015 12:05 PM, Chris Murphy wrote: >>> >>> The problem with gparted is that it works only in units of megabytes. >>> There is no way to move a partition to a particular sector or, for >>> that matter, do much of anything _exactly_. >> I'm not sure why granularity finer than 1MiB is necessary. But setting >> that aside, with a rotational drive with 4KiB sectors, you're better >> off with 1MiB alignment than not being 4KiB aligned at all. Depending >> on the drive and workload misalignment can cause a brutally bad >> performance hit. And if it doesn't then I wouldn't worry about >> changing anything. >> > Thanks everyone. That's the advice I need. The partition is ext4. I'll copy it to other media and rearrange the partitions and copy it back. >the alignment can be checked with: blockdev --getalignoff /dev/foo if a '0' is returned, the partition is aligned -- LF