Gentoo Archives: gentoo-user

From: Neil Bothwick <neil@××××××××××.uk>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] making bootable USB
Date: Mon, 01 Sep 2014 10:12:46
Message-Id: 20140901111231.6a02bc76@hactar.digimed.co.uk
In Reply to: Re: [gentoo-user] making bootable USB by Mick
1 On Mon, 1 Sep 2014 10:13:20 +0100, Mick wrote:
2
3 > Also, I have seen everywhere bs=1048576 being used with the dd command
4 > for hybrid iso images, rather than bs=4096 or some other value. I am
5 > not sure if writing a larger block size is of importance, but I mention
6 > it in case it makes a difference.
7
8 In my experience, anything over 4k makes little or no difference. The
9 filesystems have a 4k block size, so the default of 512 is dead slow, but
10 once you hit the block size the improvments stop.
11
12 I usually use dcfldd these days, which seems to do a good job of working
13 out the optimum block size for itself, instead of using a prehistoric
14 default.
15
16
17 --
18 Neil Bothwick
19
20 Anything worth fighting for is worth fighting dirty for.

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