From: John Robinson <john.robinson@anonymous.org.uk>
To: Jon@eHardcastle.com
Cc: linux-raid@vger.kernel.org
Subject: Re: Is this likely to cause me problems?
Date: Thu, 23 Sep 2010 14:14:35 +0100 [thread overview]
Message-ID: <4C9B52BB.1060204@anonymous.org.uk> (raw)
In-Reply-To: <965225.13513.qm@web51302.mail.re2.yahoo.com>
On 22/09/2010 15:38, Jon Hardcastle wrote:
[...]
> Thanks for your help. I have been doing some background reading and am concinving myself to leave the boundaries as they are as it appears there is performance gains to be had? Assuming this is true as long as the parition size is LARGER than the other 1TB paritions I should be ok, right?
>
> Device Boot Start End Blocks
> /dev/sda1 63 1953520064 976760001
> /dev/sdc1 2048 1953525167 976761560
>
> If i subtract Start from End
> sda = 1953520064 - 63 = 1953520001
> sdc = 1953525167 - 2048 = 1953523119 (3118 larger than sda)
>
> as long as sdc is larger which it is by 3118 I should be ok right?
>
> I am even thinking about individually removeing my drives from the array and letting fdisk use its new calculations for the existing drives. I could do with better performance!
Don't do that. There is no performance benefit from aligning your
partitions. There would be a performance benefit to making LVM align
itself correctly over md RAID stripes, and the filesystem over LVM or md
RAID, but there is no performance benefit from aligning md RAID over
partitions, *unless* you have 4K sector drives or SSD.
Honestly you are better off duplicating your original partition table
onto your new drive so all your partitions are the same, mostly so there
can't be any more confusion later on.
Cheers,
John.
next prev parent reply other threads:[~2010-09-23 13:14 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-21 20:33 Is this likely to cause me problems? Jon Hardcastle
2010-09-21 21:15 ` John Robinson
2010-09-21 21:18 ` Jon Hardcastle
2010-09-21 22:34 ` John Robinson
2010-09-22 6:42 ` Jon Hardcastle
2010-09-22 11:25 ` John Robinson
2010-09-22 14:38 ` Jon Hardcastle
2010-09-23 13:14 ` John Robinson [this message]
[not found] <94202.62107.qm@web51304.mail.re2.yahoo.com>
2010-09-22 9:09 ` Tim Small
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