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今天看了下faq14配置磁盘，拿u试了一下
＃ disklabel wd0 显示硬盘分区表
我用u盘实验，u盘是sd0
# disklabel sd0
disklabel: warning, DOS partition table with no valid OpenBSD partition
# /dev/rsd0c:
type: SCSI
disk: SCSI disk
label: Flash Disk
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 255
sectors/cylinder: 16065
cylinders: 250
total sectors: 4030463
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0 # microseconds
track-to-track seek: 0 # microseconds
drivedata: 0
16 partitions:
# size offset fstype [fsize bsize cpg]
c: 4030463 0 unused 0 0
i: 4028384 32 MSDOS
看上面一行，显示的u盘分区类形msdos，挂载设备名sd0i(看前面的i)
所以说加载u盘时可以用上面的命令看一下挂载点
现修改分区类型，下面这好像就是多数人说openbsd不好安装的难点
~ # fdisk -e sd0
Enter 'help' for information
fdisk: 1> p
Disk: sd0 geometry: 250/255/63 [4030463 Sectors]
Offset: 0 Signature: 0xAA55
Starting Ending LBA Info:
#: id C H S - C H S [ start: size ]
-------------------------------------------------------------------------------
0: 00 0 0 0 - 0 0 0 [ 0: 0 ] unused
1: 00 0 0 0 - 0 0 0 [ 0: 0 ] unused
2: 00 0 0 0 - 0 0 0 [ 0: 0 ] unused
*3: 06 0 0 33 - 250 193 7 [ 32: 4028384 ] DOS > 32MB
fdisk: 1> e 3 e修改3dos类型的
Starting Ending LBA Info:
#: id C H S - C H S [ start: size ]
-------------------------------------------------------------------------------
*3: 06 0 0 33 - 250 193 7 [ 32: 4028384 ] DOS > 32MB
Partition id ('0' to disable) [0 - FF]: [6] (? for help) a6 （a6 openbsd的分区类型）
Do you wish to edit in CHS mode? [n] 回车
offset: [32] 回车
size: [4028384] 回车
fdisk:*1>
fdisk:*1> p 看一下
Disk: sd0 geometry: 250/255/63 [4030463 Sectors]
Offset: 0 Signature: 0xAA55
Starting Ending LBA Info:
#: id C H S - C H S [ start: size ]
-------------------------------------------------------------------------------
0: 00 0 0 0 - 0 0 0 [ 0: 0 ] unused
1: 00 0 0 0 - 0 0 0 [ 0: 0 ] unused
2: 00 0 0 0 - 0 0 0 [ 0: 0 ] unused
*3: A6 0 0 33 - 250 193 7 [ 32: 4028384 ] OpenBSD
fdisk:*1> q 修改完毕保存退出
Writing current MBR to disk.
下面修改分区相当于dos的fdisk
~ # disklabel -E sd0
disklabel: warning, DOS partition table with no valid OpenBSD partition
Treating sectors 63-4030463 as the OpenBSD portion of the disk.
You can use the 'b' command to change this.
Initial label editor (enter '?' for help at any prompt)
> p p查看，帮助打？回车
OpenBSD area: 63-4030463; size: 4030400; free: 2047
# size offset fstype [fsize bsize cpg]
c: 4030463 0 unused 0 0
i: 4028384 32 MSDOS
> d i d删除分区
> p 再查看已删除i
OpenBSD area: 63-4030463; size: 4030400; free: 2047
# size offset fstype [fsize bsize cpg]
c: 4030463 0 unused 0 0
> a a 新建分区用a
offset: [63] 回车
size: [4030400] 1000m 分区大小1000兆
Rounding to cylinder: 2056257 回车
FS type: [4.2BSD] 分区类型直回车
> p 在看一下已经建了分区a
OpenBSD area: 63-4030463; size: 4030400; free: 1974143
# size offset fstype [fsize bsize cpg]
a: 2056257 63 4.2BSD 2048 16384 1
c: 4030463 0 unused 0 0
> q 退出保存
Write new label?: [y] 确认回车
如果是安装的话可以接着分，a是根分区，b交换分区，c整个磁盘，d,e,f,.....需要设置挂载点
这里介绍个重要参数大写的D重建分区，如果分乱了想重来就敲个D
接下来格式化，已经知道了新建的是 sd0a
~ # newfs sd0a
/dev/rsd0a: 1004.0MB in 2056288 sectors of 512 bytes
5 cylinder groups of 202.47MB, 12958 blocks, 25984 inodes each
super-block backups (for fsck -b #) at:
32, 414688, 829344, 1244000, 1658656,
~ # mount /dev/sd0a /mnt/
~ #
mount成功，开机自动mount可写入/etc/fstab
[ 本帖最后由 lionux 于 2008-12-21 15:36 编辑 ] |
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发表于 2008-12-21 15:33
