Linux：查看系统块（block）大小
查看Linux的操作系统的物理数据块和逻辑数据块大小可以有两种方式。
具体如下：
方式一：
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[root@cloudera-1 block]# pwd /sys/block [root@cloudera-1 block]# [root@cloudera-1 block]# ls -ltr total 0 lrwxrwxrwx 1 root root 0 Jan 20 23:34 sda -> ../devices/pci0000:00/0000:00:10.0/host0/target0:0:0/0:0:0:0/block/sda lrwxrwxrwx 1 root root 0 Jan 20 23:34 dm-0 -> ../devices/virtual/block/dm-0 lrwxrwxrwx 1 root root 0 Jan 20 23:34 dm-1 -> ../devices/virtual/block/dm-1 lrwxrwxrwx 1 root root 0 Jan 20 23:34 sr0 -> ../devices/pci0000:00/0000:00:07.1/ata2/host2/target2:0:0/2:0:0:0/block/sr0 [root@cloudera-1 block]# [root@cloudera-1 block]# cat sda/queue/logical_block_size 512 [root@cloudera-1 block]# [root@cloudera-1 block]# cat sda/queue/physical_block_size 512 [root@cloudera-1 block]# [root@cloudera-1 block]# cat dm-0/queue/logical_block_size 512 [root@cloudera-1 block]# [root@cloudera-1 block]# cat dm-0/queue/physical_block_size 512 [root@cloudera-1 block]# [root@cloudera-1 block]# cat sr0/queue/logical_block_size 2048 [root@cloudera-1 block]# [root@cloudera-1 block]# cat sr0/queue/physical_block_size 2048 [root@cloudera-1 block]# |
方式二：
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[root@cloudera-1 block]# lsblk -o name,phy-sec NAME PHY-SEC sda 512 ├─sda1 512 └─sda2 512 ├─centos-root 512 └─centos-swap 512 sr0 2048 [root@cloudera-1 block]# [root@cloudera-1 block]# lsblk -o name,phy-sec,log-sec NAME PHY-SEC LOG-SEC sda 512 512 ├─sda1 512 512 └─sda2 512 512 ├─centos-root 512 512 └─centos-swap 512 512 sr0 2048 2048 [root@cloudera-1 block]# |
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