linux-ext4 - [PATCH v2 4/4] man: add -b option to e2image

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Date:   Thu, 16 Nov 2017 16:55:46 +0300
From:   Artem Blagodarenko <artem.blagodarenko@...il.com>
To:     linux-ext4@...r.kernel.org
Cc:     adilger.kernel@...ger.ca,
        Artem Blagodarenko <artem.blagodarenko@...gate.com>
Subject: [PATCH v2 4/4] man: add -b option to e2image

From: Artem Blagodarenko <artem.blagodarenko@...gate.com>

Add manual page for e2image -b option.

Signed-off-by: Artem Blagodarenko <artem.blagodarenko@...il.com>
---
 misc/e2image.8.in | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/misc/e2image.8.in b/misc/e2image.8.in
index f28a76ea..d6125bb4 100644
--- a/misc/e2image.8.in
+++ b/misc/e2image.8.in
@@ -11,6 +11,14 @@ e2image \- Save critical ext2/ext3/ext4 filesystem metadata to a file
 .B \-r|Q
 ]
 [
+.B \-b
+.I superblock
+]
+[
+.B \-B
+.I blocksize
+]
+[
 .B \-fr
 ]
 .I device
@@ -167,6 +175,22 @@ the
 option will prevent analysis of problems related to hash-tree indexed
 directories.
 .PP
+Option
+.B \-b
+.I superblock
+can be used to get image from partition with broken primary superblock.
+The partition is copied as is including broken primary superblock.
+.PP
+Option
+.B \-B
+.I blocksize
+can be used to set superblock block size. Normally,  e2fsck  will  search
+for  the superblock at various different block sizes in an attempt to find
+the appropriate blocksize. This search can be fooled in some cases.  This
+option forces e2fsck to only try locating the superblock at a particular
+blocksize. If the superblock is not found, e2fsck will terminate with a
+fatal error.
+.PP
 Note that this will work even if you substitute "/dev/hda1" for another raw
 disk image, or QCOW2 image previously created by
 .BR e2image .
@@ -217,6 +241,14 @@ This can be useful to write a qcow2 image containing all data to a
 sparse image file where it can be loop mounted, or to a disk partition.
 Note that this may not work with qcow2 images not generated by e2image.
 .PP
+Options
+.B \-b
+.I superblock
+and
+.B \-B
+.I blocksize
+can be used same way as for raw images.
+.PP
 .SH INCLUDING DATA
 Normally
 .B e2image
-- 
2.13.6 (Apple Git-96)