Date: Tue, 29 Jan 2013 13:59:39 +0200 From: Volodymyr Kostyrko <c.kworr@gmail.com> To: Thomas Mueller <mueller6724@bellsouth.net> Cc: freebsd-questions@freebsd.org Subject: Re: ZFS - whole disk or partition or BSD slice? Message-ID: <5107B9AB.5090800@gmail.com> In-Reply-To: <05.C7.10746.CD537015@smtp02.insight.synacor.com> References: <05.C7.10746.CD537015@smtp02.insight.synacor.com>
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29.01.2013 04:37, Thomas Mueller: > 28.01.2013 01:57, james: >> I have a 9.1 system with some SATA disks in RAIDZ, upgraded from 9.0. >> >> The disks are all the same type, and I formatted them for FreeBSD and >> put ZFS in a slice covering most of them. >> >> I have seen suggestions for OpenIndiana etc that it is better to let ZFS >> have the whole raw disk and that this can control the way it manages the >> disk writeback mode. > > Responses from Vladimir Kostyrko ^ : > > ^ My home computer is set up in the dedicated mode. No grave difference. > ^ Not even a scratch. > >> Does this apply to FreeBSD and ZFS too? > > ^ No. > >> Presumably the disks are currently FreeBSD-specific. If I used raw >> disks instead of slices, could I read them from a Solaris system too? > > ^ I'm mostly sure you would be able to read disks from Solaris/x86. > ^ However Solaris/Sparc uses another labeling scheme. If you want to be > ^ fully compatible with other system GPT is a better choice. > > Is GPT compatible with Solaris, can Solaris access a GPT disk? Yes. I'm not sure if it can boot off GPT disk but on Solaris zpool automatically creates boundary GPT partition to protect ZFS vdev. > > I tried OpenIndiana installable live USB stick, and my Western Digital > Caviar Green 3 TB hard disk, partitioned with GPT, was not recognized or > readable; same was true for Western Digital My Book Essential 3 TB USB 3.0 > hard disk, also partitioned GPT. This was on amd64 system. Except OI. https://www.illumos.org/issues/208 -- Sphinx of black quartz, judge my vow.
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