Date: Sun, 8 Dec 2019 14:21:39 +0000 (UTC) From: Benedict Reuschling <bcr@FreeBSD.org> To: doc-committers@freebsd.org, svn-doc-all@freebsd.org, svn-doc-head@freebsd.org Subject: svn commit: r53667 - head/en_US.ISO8859-1/books/handbook/zfs Message-ID: <201912081421.xB8ELdwV068099@repo.freebsd.org>
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Author: bcr Date: Sun Dec 8 14:21:38 2019 New Revision: 53667 URL: https://svnweb.freebsd.org/changeset/doc/53667 Log: Add a caution against using whole disks for zpools that are used for booting, mirrors, and RAIDZ. PR: 241956 Submitted by: pauamma@gundo.com Approved by: tsoome@ Differential Revision: https://reviews.freebsd.org/D22663 Modified: head/en_US.ISO8859-1/books/handbook/zfs/chapter.xml Modified: head/en_US.ISO8859-1/books/handbook/zfs/chapter.xml ============================================================================== --- head/en_US.ISO8859-1/books/handbook/zfs/chapter.xml Sun Dec 8 10:32:49 2019 (r53666) +++ head/en_US.ISO8859-1/books/handbook/zfs/chapter.xml Sun Dec 8 14:21:38 2019 (r53667) @@ -3553,6 +3553,18 @@ vfs.zfs.vdev.cache.size="5M"</programlisting> a partition rather than the entire disk. This differs from recommendations made by the Solaris documentation.</para> + + <caution> + <para>Using an entire disk as part of a bootable + pool is strongly discouraged, as this may render + the pool unbootable. Likewise, you should not + use an entire disk as part of a mirror or + <acronym>RAID-Z</acronym> vdev. These are + because it it impossible to reliably determine + the size of an unpartitioned disk at boot time + and because there's no place to put in boot + code.</para> + </caution> </listitem> <listitem>
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