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57 lines
2.0 KiB
57 lines
2.0 KiB
11 months ago
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From 33831d845a48b9a2ac4d1e954c88a3dd8cb15753 Mon Sep 17 00:00:00 2001
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From: Logan Gunthorpe <logang@deltatee.com>
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Date: Wed, 1 Mar 2023 13:41:35 -0700
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Subject: [PATCH 105/125] manpage: Add --write-zeroes option to manpage
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Document the new --write-zeroes option in the manpage.
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Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
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Acked-by: Kinga Tanska <kinga.tanska@linux.intel.com>
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Reviewed-by: Xiao Ni <xni@redhat.com>
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Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
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Acked-by: Coly Li <colyli@suse.de>
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Signed-off-by: Jes Sorensen <jes@trained-monkey.org>
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---
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mdadm.8.in | 18 +++++++++++++++++-
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1 file changed, 17 insertions(+), 1 deletion(-)
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diff --git a/mdadm.8.in b/mdadm.8.in
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index 64f71ed1..6f0f6c13 100644
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--- a/mdadm.8.in
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+++ b/mdadm.8.in
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@@ -837,6 +837,22 @@ array is resynced at creation. From Linux version 3.0,
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.B \-\-assume\-clean
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can be used with that command to avoid the automatic resync.
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+.TP
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+.BR \-\-write-zeroes
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+When creating an array, send write zeroes requests to all the block
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+devices. This should zero the data area on all disks such that the
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+initial sync is not necessary and, if successfull, will behave
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+as if
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+.B \-\-assume\-clean
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+was specified.
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+.IP
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+This is intended for use with devices that have hardware offload for
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+zeroing, but despite this zeroing can still take several minutes for
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+large disks. Thus a message is printed before and after zeroing and
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+each disk is zeroed in parallel with the others.
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+.IP
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+This is only meaningful with --create.
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+
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.TP
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.BR \-\-backup\-file=
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This is needed when
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@@ -1370,7 +1386,7 @@ and
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.B layout\-alternate
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options are for RAID0 arrays with non-uniform devices size that were in
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use before Linux 5.4. If the array was being used with Linux 3.13 or
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-earlier, then to assemble the array on a new kernel,
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+earlier, then to assemble the array on a new kernel,
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.B \-\-update=layout\-original
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must be given. If the array was created and used with a kernel from Linux 3.14 to
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Linux 5.3, then
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--
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2.38.1
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