Date: Thu, 8 Jul 2010 04:18:35 -0700 (PDT) From: Simun Mikecin <numisemis@yahoo.com> To: Andrew Snow <andrew@modulus.org> Cc: freebsd-fs@freebsd.org Subject: Re: Freebsd 8 Release /usr Die After host VMWARE Crash Message-ID: <394586.41761.qm@web112417.mail.gq1.yahoo.com> In-Reply-To: <4C358574.2040009@modulus.org> References: <AANLkTiknH3e0X5lu30azKWguKkgbH_-3pOLQKXinCDPs@mail.gmail.com> <AANLkTilN4EA6hYYRwbPggAdz6O6iPjA_5Em5SU8hXTlC@mail.gmail.com> <4C3563A8.7060301@modulus.org> <688583.92527.qm@web112402.mail.gq1.yahoo.com> <4C358574.2040009@modulus.org>
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----- Original Message ----
> From: Andrew Snow <andrew@modulus.org>
> To: Simun Mikecin <numisemis@yahoo.com>; freebsd-fs@freebsd.org
> Sent: Thu, July 8, 2010 9:59:48 AM
> Subject: Re: Freebsd 8 Release /usr Die After host VMWARE Crash
>
> On 08/07/10 17:45, Simun Mikecin wrote:
> > AFAIK virtual environments ignore disk sync requests by default. For
>example, in
> > VirtualBox they are ignored by default, by you could enable it if you want
>(with
> > a performance penalty). Haven't used VMWare, so not 100% sure about it,
>maybe
> > someone more knowledgable with VMWare knows what it's defaults are.
>
> VMware vSphere/ESX/ESXi makes all writes synchronous.
>
> (It is terribly slow on RAID cards that lack battery-backed cache!)
Thanx for the info.
But, there is still a chance that the host environment on which (original
poster's) VMware is running uses a lying ATA drive or some other storage that
behaves the same as a lying ATA drive.
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