|
From: | Linda Walsh |
Subject: | bug#12626: Bug?: dd limited to <2G read size (2G-8K) on 64 bit machine? |
Date: | Fri, 12 Oct 2012 08:14:37 -0700 |
User-agent: | Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.8.1.24) Gecko/20100228 Lightning/0.9 Thunderbird/2.0.0.24 Mnenhy/0.7.6.666 |
I was writing to /dev/null. It doesn't seem to have an issue. This appears to be related to "iflag=direct" more than anything.W/o direct it works, but, for example I can't use iflag=direct with /dev/zero
for even a 4K block size. Hmmm.... Paul Eggert wrote:
On 10/12/2012 02:14 AM, Pádraig Brady wrote:if you specify ibs and obs seperately, then you will get writes of the size you requested at least.Won't there be similar problems with the write system call too? Perhaps not on Linda's system, but on other systems. Once the buffer size exceeds 2 GB or so, things get pretty dicey in the wild, not due to any problem in dd itself, but due to the kernels or file systems that dd relies on.
[Prev in Thread] | Current Thread | [Next in Thread] |