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Date: Tue, 10 Jun 2014 16:17:45 +0200
From: Edward Tomasz =?utf-8?Q?Napiera=C5=82a?= <trasz@FreeBSD.org>
To: Anton Shterenlikht <mexas@bris.ac.uk>
Subject: Re: svn: E000005: Can't read file '/usr/ports/.svn/pristine/73/...
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On 0610T1447, Anton Shterenlikht wrote:
> I'm trying to bisect a sparc64 port failure and
> have to move between multiple ports revisions.
> 
> I get lots of errors like this:
> 
> svn: E000005: Can't read file '/usr/ports/.svn/pristine/73/737bbb7d1b529d920172f3ae59f3a5e26d14afb9.svn-base': Input/output error
> svn: E000005: Additional errors:
> svn: E000005: Can't read file '/usr/ports/.svn/pristine/73/737bbb7d1b529d920172f3ae59f3a5e26d14afb9.svn-base': Input/output error
> 
> with svn up, whether moving into the future or
> into the past.
> 
> have to run svn cleanup after every such failure.

Look at dmesg.  Do you see any disk read/write errors?  What
does smartctl say?  Have you tried to boot in single user mode
and do full fsck?