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raid5磁盘阵列超过16T格式化ext4问题

2016/10/29 linux

raid5磁盘阵列超过16T格式化ext4问题

背景

有一台服务器，是大容量存储，超过16T的磁盘，做raid5磁盘阵列，格式的时候出现如下错误

执行如下命令格式化 mkfs.ext4 /dev/md0

[root@localhost ~]# mkfs.ext4 /dev/md0
mke2fs 1.42.8 (20-Jun-2013)

Warning: the fs_type huge is not defined in mke2fs.conf

mkfs.ext4: Size of device (0x15d507b00 blocks) /dev/md0 too big to be expressed
        in 32 bits using a blocksize of 4096.

解决方法

修改 vim /etc/mke2fd.conf,的ext4配置选项中加入auto_64-bit_support = 1

[fs_types]
        ext3 = {
                features = has_journal
                blocksize = 4096
                inode_size = 256
                inode_ratio = 8192
        }
        ext4 = {
                features = has_journal,extent,huge_file,flex_bg,uninit_bg,dir_nlink,extra_isize
                blocksize = 4096
                inode_size = 256
                inode_ratio = 8192
                auto_64-bit_support = 1 #加上这行参数
        }
        ext4dev = {
                features = has_journal,extent,huge_file,flex_bg,uninit_bg,dir_nlink,extra_isize
                inode_size = 256
                options = test_fs=1
        }

参考

http://www.linuxidc.com/Linux/2017-06/144960.htm
https://linux.cn/article-6102-1.html

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