Date: Mon, 18 Apr 2011 10:51:10 -0700 From: Craig Whipp <crwhipp@gmail.com> To: Gautham Ganapathy <gautham@lisphacker.org> Cc: questions@freebsd.org Subject: Re: ZFS on USB / Sound on alienware m11x Message-ID: <20110418175110.GA90485@revo.domain.actdsltmp> In-Reply-To: <BANLkTimJqD1MNVFSK39Bx8L=sNC6Yn6uCw@mail.gmail.com> References: <BANLkTimJqD1MNVFSK39Bx8L=sNC6Yn6uCw@mail.gmail.com>
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--cNdxnHkX5QqsyA0e Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, 18 Apr 2011 16:58:28 +0000, Gautham Ganapathy wrote: > Hi > > I am trying out FreeBSD on ZFS using the PC-BSD 8.2 installer. I have > it installed on a Western Digital USB HDD connected to an Alienware > m11x laptop. It seems to work well except that once in a while, any > application performing a write freezes for a few seconds (around 15=20 > or > so) and looking at top shows their states to be in zio. Is this > because it was installed on a USB drive? > I've experienced the same behavior on my external USB WD drive. I found that many of the Western Digital external drives will spin-down after some period of time. The wait you're experiencing is probably the time it takes to spin-up. WD has a utility to disable the spin-down feature. It's windows only, however. http://support.wdc.com/product/download.asp?groupid=3D304&sid=3D17&lang=3D= en - Craig --cNdxnHkX5QqsyA0e Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.17 (FreeBSD) iQEcBAEBAgAGBQJNrHoOAAoJEKpOrBlBNtKl3VkIANKHxyaffy5n6jpJU4EgQDPl ydFosgRhpeXx5lLeXn4BWQD5e/YZZ8h988rQJ99z1aqhVjMh8ml9ABrBUKvVuy8k IaTYKH2HW/8ejkGRd+P86iuAGL/7mgYVm0wmm5OPr6l4XyATs/wkoqguDz0MHz6B yCdek1tiD/Y5bMlR67dCS+IAaEy6xQ+4GwXgKckzWrBzkBfe+NKOIQ6oCEOkxqOb vzp2q2+9Li9pzdH6H9pYR7eN/C6DpTA+7hE54mJUHUBKJ7WPFetIBrMpbHorK+B2 ekmtG26wQ4/lBunIc3D6wCIUeM7Rc6uQbLM20LFR8zVTIsG524cGPoTcLAk4hMA= =lY89 -----END PGP SIGNATURE----- --cNdxnHkX5QqsyA0e--
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