On Sat, Feb 28, 2015 at 12:33 AM, Robert Arkiletian wrote:
> According to this pdf [1] alignment is important but from what I understand
> 512e emulation still has a small RMW performance hit from writes that are
> smaller than 4k or if the writes are not a multiple of 4k.
There shouldn't be writ
On Fri, Feb 27, 2015 at 2:59 PM, Chris Murphy
wrote:
> On Fri, Feb 27, 2015 at 1:53 PM, Robert Arkiletian
> wrote:
> > Still have good quality older sata hardware raid cards that require 512
> > bytes/sector. As far as I know HD manufacturers are not making native 512
> > bytes/sector drives any
The default for fdisk, parted, and gdisk is starting the first
partition on LBA 2048, which is 8 sector aligned. You don't need any
options. The alternative is to simply not partition the drives or the
resulting RAID and just format it.
Chris Murphy
___
On 2/27/2015 3:06 PM, m.r...@5-cent.us wrote:
Alignment's easy: using parted (the user-hostile program), if you do go in
with parted -a optimal /dev/drive, and do
mkpart pri ext4 0.0GB 100% (for non-root drives, for example), it's
aligned correctly.
i found -a optimal to do weird things, and al
Chris Murphy wrote:
> The emulation implementations don't come into play if the alignment is
> correct from the start. The better implementations have significantly
> less pathological behavior if alignment is wrong, but that's
> anecdotal, I don't have any empirical data available. But I'd say in
On Fri, Feb 27, 2015 at 1:53 PM, Robert Arkiletian wrote:
> Still have good quality older sata hardware raid cards that require 512
> bytes/sector. As far as I know HD manufacturers are not making native 512
> bytes/sector drives any more.
512n drives still exist, although they tend to be a bit s
On 2/27/2015 12:53 PM, Robert Arkiletian wrote:
Still have good quality older sata hardware raid cards that require 512
bytes/sector. As far as I know HD manufacturers are not making native 512
bytes/sector drives any more.
Some have better 512e emulation than others. Looking for some advice on
Still have good quality older sata hardware raid cards that require 512
bytes/sector. As far as I know HD manufacturers are not making native 512
bytes/sector drives any more.
Some have better 512e emulation than others. Looking for some advice on
which to avoid and which are recommended. Thanks.
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