Date: Tue, 22 Dec 2009 13:19:20 -0600 From: Scot Hetzel <swhetzel@gmail.com> To: krad <kraduk@googlemail.com> Cc: Mel Flynn <mel.flynn+fbsd.current@mailing.thruhere.net>, freebsd-current@freebsd.org, Andriy Gapon <avg@icyb.net.ua> Subject: Re: Some notes on RootOnZFS article in wiki Message-ID: <790a9fff0912221119ve4ab385me528ffd8ab1b50b8@mail.gmail.com> In-Reply-To: <d36406630912220805l7f45e6c5gedbd6994255f907d@mail.gmail.com> References: <200912210600.46044.mel.flynn%2Bfbsd.current@mailing.thruhere.net> <790a9fff0912211047w6e0ee46co420869f25a7a016d@mail.gmail.com> <d36406630912220302o5161dd50i45b69bd5003ad386@mail.gmail.com> <4B30D75D.6010708@icyb.net.ua> <d36406630912220805l7f45e6c5gedbd6994255f907d@mail.gmail.com>
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On 12/22/09, krad <kraduk@googlemail.com> wrote: > > > 2009/12/22 Andriy Gapon <avg@icyb.net.ua> > > > on 22/12/2009 13:02 krad said the following: > > > > > > > > Are there still issues with using zvols for swap? If not you don't need > a > > > slice for swap and can get rid of gmirror entirely. > > > > Is this supported at all _on FreeBSD_? > > Even, if yes, one drawback is that you wouldn't be able to use zvol swap > as a dump > > device. > > > > > > -- > > Andriy Gapon > > > > Even is you use a dedicated zvol for crashdump only? > Opensolaris uses a seperate zvol for crash dumps, so I gave it a try and created a zvol. zfs create -V 8G zroot/dump zfs set checksum=off zroot/dump But when dumpon executes, it tells you that dumps are not supported to zfs zvolumes. dv8t01# dumpon /dev/zvol/zroot/dump dumpon: ioctl(DIOCSKERNELDUMP): Operation not supported Scot
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