From: Zheng Liu <gnehzuil.liu@gmail.com>
To: Michael <mike@draftx.net>
Cc: "H. Peter Anvin" <hpa@zytor.com>, Theodore Ts'o <tytso@mit.edu>,
linux-ext4@vger.kernel.org
Subject: Re: EXT4 Larger Than 16TB
Date: Mon, 22 Jul 2013 08:52:27 +0800 [thread overview]
Message-ID: <20130722005227.GA19341@gmail.com> (raw)
In-Reply-To: <CAGJTRchJ4Mq5in0nXeeF8mA2A=yub7kv4OohUb_QpKtEKCWM-A@mail.gmail.com>
Hi Michael,
On Sun, Jul 21, 2013 at 07:44:12PM -0500, Michael wrote:
> Also, in /etc/mke2fs.conf(Ubuntu has this by default):
> ext4 = {
> features =
> has_journal,extent,huge_file,flex_bg,uninit_bg,dir_nlink,extra_isize
> auto_64-bit_support = 1
> inode_size = 256
> }
>
> ext4dev = {
> features =
> has_journal,extent,huge_file,flex_bg,uninit_bg,dir_nlink,extra_isize
> inode_size = 256
> options = test_fs=1
> }
>
>
>
> Also, any info on how to find out if my fs is 64 bit or not? I don't
> know what this config was back when I made the system.
You could use 'tune2fs -l ${DEV}' to check whether 64bit feature is
enabled. Here is a sample result:
$ sudo tune2fs -l /dev/sda1
tune2fs 1.43-WIP (21-Jan-2013)
Filesystem volume name: <none>
Last mounted on: <not available>
Filesystem UUID: 5abc13bd-01d9-41ff-b7ca-a028b3d610f8
Filesystem magic number: 0xEF53
Filesystem revision #: 1 (dynamic)
Filesystem features: has_journal ext_attr resize_inode dir_index
filetype extent 64bit flex_bg sparse_super large_file huge_file
^^^^^
uninit_bg dir_nlink extra_isize
Filesystem flags: signed_directory_hash
Default mount options: user_xattr acl
Filesystem state: clean
Errors behavior: Continue
Filesystem OS type: Linux
Inode count: 5021696
Block count: 20081242
Reserved block count: 1004062
Free blocks: 19719931
Free inodes: 5021685
First block: 0
Block size: 4096
Fragment size: 4096
Reserved GDT blocks: 1024
Blocks per group: 32768
Fragments per group: 32768
Inodes per group: 8192
Inode blocks per group: 512
Flex block group size: 16
Filesystem created: Mon Jul 22 08:50:15 2013
Last mount time: n/a
Last write time: Mon Jul 22 08:50:25 2013
Mount count: 0
Maximum mount count: -1
Last checked: Mon Jul 22 08:50:15 2013
Check interval: 0 (<none>)
Lifetime writes: 1358 MB
Reserved blocks uid: 0 (user root)
Reserved blocks gid: 0 (group root)
First inode: 11
Inode size: 256
Required extra isize: 28
Desired extra isize: 28
Journal inode: 8
Default directory hash: half_md4
Directory Hash Seed: 7d9a465d-3e37-4d41-af45-fff9c682f8ec
Journal backup: inode blocks
Regards,
- Zheng
next prev parent reply other threads:[~2013-07-22 0:52 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-08 21:32 EXT4 Larger Than 16TB Michael
2013-07-09 2:14 ` Theodore Ts'o
2013-07-09 13:45 ` Michael
2013-07-21 22:47 ` H. Peter Anvin
2013-07-21 23:43 ` Zheng Liu
2013-07-22 0:44 ` Michael
2013-07-22 0:52 ` Zheng Liu [this message]
2013-07-22 0:59 ` Michael
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