多路徑格式化，對磁碟操作提示要分割槽，對別名操作正常格式化
SAN儲存劃分到伺服器後，伺服器需要對其格式化，該伺服器才能mount這塊儲存。
--多路徑的磁碟，擁有一樣的wwid
[root@sdb etc]# fdisk -l |grep dev|grep -v sda
Disk /dev/sdb: 1099.5 GB, 1099529453568 bytes
Disk /dev/sdc: 1099.5 GB, 1099529453568 bytes
Disk /dev/sdd: 1099.5 GB, 1099529453568 bytes
Disk /dev/mapper/3600a09803830464d6c5d4c6c47664356: 1099.5 GB, 1099529453568 bytes
[root@sdb etc]# multipath -l
3600a09803830464d6c5d4c6c47664356 dm-0 NETAPP,LUN C-Mode
size=1.0T features='3 queue_if_no_path pg_init_retries 50' hwhandler='0' wp=rw
|-+- policy='round-robin 0' prio=0 status=active
| |- 1:0:0:0 sdb 8:16 active undef running
| `- 2:0:0:0 sdd 8:48 active undef running
`-+- policy='round-robin 0' prio=0 status=enabled
`- 1:0:1:0 sdc 8:32 active undef running
[root@sdb etc]# scsi_id -g -u /dev/sdb
3600a09803830464d6c5d4c6c47664356
[root@srmdb etc]# scsi_id -g -u /dev/mapper/3600a09803830464d6c5d4c6c47664356
3600a09803830464d6c5d4c6c47664356
--直接mount報錯，提示需要格式化
[root@sdb etc]# mount /dev/mapper/3600a09803830464d6c5d4c6c47664356 /u02
mount: you must specify the filesystem type
--對/dev/sdb磁碟操作提示要分割槽
[root@sdb etc]# mkfs -t ext4 /dev/sdb
mke2fs 1.41.12 (17-May-2010)
/dev/sdb is entire device, not just one partition!
Proceed anyway? (y,n) n
--對/dev/mapper/wwid別名操作不需要分割槽
[root@sdb etc]# mkfs -t ext4 /dev/mapper/3600a09803830464d6c5d4c6c47664356
mke2fs 1.41.12 (17-May-2010)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=1 blocks, Stripe width=16 blocks
67117056 inodes, 268439808 blocks
13421990 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4294967296
8193 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968,
102400000, 214990848
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 33 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
--多路徑的磁碟，擁有一樣的wwid
[root@sdb etc]# fdisk -l |grep dev|grep -v sda
Disk /dev/sdb: 1099.5 GB, 1099529453568 bytes
Disk /dev/sdc: 1099.5 GB, 1099529453568 bytes
Disk /dev/sdd: 1099.5 GB, 1099529453568 bytes
Disk /dev/mapper/3600a09803830464d6c5d4c6c47664356: 1099.5 GB, 1099529453568 bytes
[root@sdb etc]# multipath -l
3600a09803830464d6c5d4c6c47664356 dm-0 NETAPP,LUN C-Mode
size=1.0T features='3 queue_if_no_path pg_init_retries 50' hwhandler='0' wp=rw
|-+- policy='round-robin 0' prio=0 status=active
| |- 1:0:0:0 sdb 8:16 active undef running
| `- 2:0:0:0 sdd 8:48 active undef running
`-+- policy='round-robin 0' prio=0 status=enabled
`- 1:0:1:0 sdc 8:32 active undef running
[root@sdb etc]# scsi_id -g -u /dev/sdb
3600a09803830464d6c5d4c6c47664356
[root@srmdb etc]# scsi_id -g -u /dev/mapper/3600a09803830464d6c5d4c6c47664356
3600a09803830464d6c5d4c6c47664356
--直接mount報錯，提示需要格式化
[root@sdb etc]# mount /dev/mapper/3600a09803830464d6c5d4c6c47664356 /u02
mount: you must specify the filesystem type
--對/dev/sdb磁碟操作提示要分割槽
[root@sdb etc]# mkfs -t ext4 /dev/sdb
mke2fs 1.41.12 (17-May-2010)
/dev/sdb is entire device, not just one partition!
Proceed anyway? (y,n) n
--對/dev/mapper/wwid別名操作不需要分割槽
[root@sdb etc]# mkfs -t ext4 /dev/mapper/3600a09803830464d6c5d4c6c47664356
mke2fs 1.41.12 (17-May-2010)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=1 blocks, Stripe width=16 blocks
67117056 inodes, 268439808 blocks
13421990 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4294967296
8193 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968,
102400000, 214990848
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 33 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
來自 “ ITPUB部落格 ” ，連結：http://blog.itpub.net/30126024/viewspace-2154614/，如需轉載，請註明出處，否則將追究法律責任。
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