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July 2014

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Subject:
Re: USB external drive errors with many different hardware
From:
"Patrick J. LoPresti" <[log in to unmask]>
Reply To:
Patrick J. LoPresti
Date:
Tue, 1 Jul 2014 14:47:27 -0700
Content-Type:
text/plain
Parts/Attachments:
text/plain (19 lines) 
On Tue, Jul 1, 2014 at 1:28 PM, Andras Horvath <[log in to unmask]> wrote:
> On Tue, 1 Jul 2014 13:19:10 -0700
>> Something like this is more sane:
>>
>>   sysctl -w vm.dirty_background_bytes=67108864
>>   sysctl -w vm.dirty_background_bytes=134217728

Cut&paste error there. That second line should read
"vm.dirty_bytes=134217728". The idea is to block the writer if the
page cache gets sufficiently backed up.

You can also try turning down vm.dirty_writeback_centisecs and
dirty_expire_centisecs, within reason... That should also help to keep
the writes flowing.

Sorry this didn't help. Good luck.

 - Pat

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