Gentoo Archives: gentoo-user

From: Todd Goodman <tsg@×××××××××.net>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] Resizing a FAT partition?
Date: Thu, 30 Jul 2015 19:18:53
Message-Id: 20150730191836.GL6904@ns1.bonedaddy.net
In Reply to: [gentoo-user] Resizing a FAT partition? by Meino.Cramer@gmx.de
1 * Meino.Cramer@×××.de <Meino.Cramer@×××.de> [150730 14:32]:
2 > Hi,
3 >
4 > I have a SDcard of this layout:
5 > Number Start End Size Type File system Flags
6 > 1 4194kB 32.0GB 32.0GB primary fat32 lba
7 >
8 > There are about 11 GByte of data on it.
9 >
10 > The final result should be a SDcard with two partitions.
11 > First a FAT32 with about 20GByte and a second with 10GByte
12 > (ext4).
13 >
14 > I took a look at parted and the resize command, which sounds
15 > a little cryptic to me:
16 >
17 > resizepart partition end
18 > Change the end position of partition. Note that this does not modify any
19 > filesystem present in the partition.
20 >
21 > One should use resize2f for that purpose.
22 >
23 > Firstly I want to shrink the first partition and secondly it is a
24 > plain FAT32 partition not ext-something. I did not find a
25 > "resizefat32" or similiar.
26 >
27 > What tools do I need?
28 > (beside the way to backup the SDcard, reinitialize it, put 2
29 > partitions on it and copy back the stuff.)
30 >
31 > How can I acchieve what I want?
32 >
33 > Thank you very much in advance for any help!
34 >
35 > Best regards,
36 > Meino
37
38 Hi Meino,
39
40 The "difficulty" with shrinking partitions is that you need to shrink
41 the filesystem in the partition first and then change the partition
42 information (which you can then do if you're careful with your favorite
43 partition tool.)
44
45 There are definitely tools to do this and I'm surprised parted says it
46 doesn't touch the filesystem in the partition (but that might have been
47 a recent parted change?)
48
49 Personally, since you're going to play around with the partitions and
50 resizing existing filesystems, you should really have a backup.
51
52 If you're going to have a backup then the easiest thing to me is to
53 create new partitions and then filesystems and then restore from the
54 backup.
55
56 However, if you really want to live dangerously, the last gparted boot
57 disc image I used could shrink FAT32 filesystems and partitions. You
58 might want to see if it still can do so.
59
60 Good luck!
61
62 Todd

Replies

Subject Author
Re: [gentoo-user] Resizing a FAT partition? Mick <michaelkintzios@×××××.com>