Date: Mon, 25 Jun 2012 23:30:52 +0100 From: maxim naumov <muxx.mailinglists@gmail.com> To: Hans Petter Selasky <hselasky@c2i.net> Cc: freebsd-usb@freebsd.org Subject: Re: Seagate FreeAgent GoFlex 1.5TB external HDD problems Message-ID: <CAGG2AkJu249QX7Kjf9dVDHC4=0K4Lk1QfVcW12T0%2BANLcDeuqw@mail.gmail.com> In-Reply-To: <201206251700.39759.hselasky@c2i.net> References: <CAGG2Ak%2BXmWvCb3PQoqPXAW7iC0PAQ=GNV79MhhGHjLO4GmWgdw@mail.gmail.com> <201206241533.08745.hselasky@c2i.net> <CAGG2Ak%2Bz3%2B=jcZ6Znws9BLCZX=Ja%2B24n8MLeWfLNO-%2BoJseVDQ@mail.gmail.com> <201206251700.39759.hselasky@c2i.net>
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On Mon, Jun 25, 2012 at 4:00 PM, Hans Petter Selasky <hselasky@c2i.net> wrote:
> BTW: You could try to make a simple c-test program that reads and writes
> random LBA's from user-space, and see when it stops working.
left it running iozone -a on the block device for the whole evening.
iozone does lots of reads and writes of different sizes ("record sizes
of 4k to 16M for file sizes of 64k to 512M" from the man). observed
transfer rates in iostat smaller and larger than with previous tests.
no errors detected. 8(
however, I don't think iozone will seek further than 512M. previously
the errors appeared with higher LBAs. not sure if the failure depends
on offset, time, temperature, whatever.
will leave running iozone -A overnight.
to be honest, I was expecting it to fail much sooner. I am quite
puzzled why the fact of using a filesystem makes it fail.
/max
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