xp_fixeddrvies提供磁盘分区的信息太少，如下的脚本提供磁盘分区的使用情况，运行需要管理员权限！
if not exists( select * from sys.configurations(nolock) cc
where cc.name='xp_cmdshell'
and cc.value_in_use=1)
begin
exec sp_configure 'show advanced options',1
reconfigure
exec sp_configure 'xp_cmdshell',1
reconfigure
end
if OBJECT_ID('tempdb..#fixeddrives_temp') is not null
drop table #fixeddrives_temp;
Go
if OBJECT_ID('tempdb..#totaldrives_temp') is not null
drop table #totaldrives_temp;
Go
create table tempdb..#fixeddrives_temp(drive char(1),freesize bigint)
create table tempdb..#totaldrives_temp(size varchar(100));
insert into #totaldrives_temp exec xp_cmdshell 'wmic LogicalDisk get deviceid,size'
insert into #fixeddrives_temp exec xp_fixeddrives
select f.drive,
t.[totalsizeMB] as [总空间MB],
(t.[totalsizeMB]-cast(f.freesize as decimal(20,0))) as [已用空间MB],
f.freesize as [未用空间MB],
cast(((t.[totalsizeMB]-cast(f.freesize as bigint))*100.0/t.[totalsizeMB]) as decimal(5,1)) as [已使用%],
cast((cast(f.freesize as bigint)*100.0/t.[totalsizeMB]) as decimal(5,1)) as [未使用%]
from
(
select rtrim(left(LTRIM(size),1)) as drive,
cast(replace(replace(replace(ltrim(RIGHT(rtrim(size),LEN(size)-2)),char(9),''),char(10),''),CHAR(13),'') as bigint)/1024/1024 as [totalsizeMB]
from #totaldrives_temp
where size not like '%DeviceID Size%' and LEN(size) not IN (0,1)
) AS t
inner join #fixeddrives_temp f
on t.drive=f.drive
