红帽全球峰会5.8.4. 指定单位
要指定 LVM 报告显示的单位，请使用报告命令的
--units 参数。您可以指定字节（b）、千字节（k）、兆字节（m）、千兆字节（g）、兆兆字节（t）、艾字节（e）、拍字节（p）以及可读。默认显示是可读。您可以通过在 lvm.conf 文件的 global 部分设定 units 参数来覆盖默认设置。
下面的例子指定
pvs 命令的输出结果以兆为单位，而不是默认的千兆为单位。
# pvs --units m
PV VG Fmt Attr PSize PFree
/dev/sda1 lvm2 -- 17555.40M 17555.40M
/dev/sdb1 new_vg lvm2 a- 17552.00M 17552.00M
/dev/sdc1 new_vg lvm2 a- 17552.00M 17500.00M
/dev/sdd1 new_vg lvm2 a- 17552.00M 17552.00M
默认情况下，单位显示为 2 的乘方（乘 1024）。您通过大写单位说明（B、K、M、G、T、H）指定将单位显示为乘 1000。
下面的命令以默认行为，即乘 1024 显示输出结果。
# pvs
PV VG Fmt Attr PSize PFree
/dev/sdb1 new_vg lvm2 a- 17.14G 17.14G
/dev/sdc1 new_vg lvm2 a- 17.14G 17.09G
/dev/sdd1 new_vg lvm2 a- 17.14G 17.14G
下面的命令以乘 1000 显示输出结果。
# pvs --units G
PV VG Fmt Attr PSize PFree
/dev/sdb1 new_vg lvm2 a- 18.40G 18.40G
/dev/sdc1 new_vg lvm2 a- 18.40G 18.35G
/dev/sdd1 new_vg lvm2 a- 18.40G 18.40G
您还可以指定扇区（sector，定义为 512K），或者自定义单位。
下面的命令以扇区的数目显示
pvs 命令的输出结果。
# pvs --units s
PV VG Fmt Attr PSize PFree
/dev/sdb1 new_vg lvm2 a- 35946496S 35946496S
/dev/sdc1 new_vg lvm2 a- 35946496S 35840000S
/dev/sdd1 new_vg lvm2 a- 35946496S 35946496S
The following example displays the output of the
pvs command in units of 4 MB.
# pvs --units 4m
PV VG Fmt Attr PSize PFree
/dev/sdb1 new_vg lvm2 a- 4388.00U 4388.00U
/dev/sdc1 new_vg lvm2 a- 4388.00U 4375.00U
/dev/sdd1 new_vg lvm2 a- 4388.00U 4388.00U
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