写入磁盘需要更多时间，由于 Solaris 机器上的磁盘延迟，应用程序无法正常工作。如何找出磁盘（md500）有故障或磁盘出现任何问题
$ iostat -em
---- errors ---
device s/w h/w trn tot
lofi126 0 0 0 0
md200 0 0 0 0
md201 0 0 0 0
md202 0 0 0 0
md210 0 0 0 0
md211 0 0 0 0
md212 0 0 0 0
md230 0 0 0 0
md231 0 0 0 0
md232 0 0 0 0
md240 0 0 0 0
md241 0 0 0 0
md242 0 0 0 0
md250 0 0 0 0
md251 0 0 0 0
md252 0 0 0 0
md260 0 0 0 0
md261 0 0 0 0
md262 0 0 0 0
md400 0 0 0 0
md401 0 0 0 0
md402 0 0 0 0
md403 0 0 0 0
md404 0 0 0 0
md405 0 0 0 0
md500 0 0 0 0
sd0 0 0 0 0
sd1 0 0 0 0
sd2 0 0 0 0
sd3 0 0 0 0
sd4 0 0 0 0
sd5 0 0 0 0
sd6 0 0 0 0
sd7 0 0 0 0
sd8 0 0 0 0
sd15 0 1 0 1
sd16 0 0 0 0
sd17 0 0 0 0
sd18 0 0 0 0
sd19 0 0 0 0
sd20 0 0 0 0
sd21 0 0 0 0
sd22 0 0 0 0
sd25 0 0 0 0
sd26 0 0 0 0
sd27 0 0 0 0
sd28 0 0 0 0
sd29 0 0 58 58
nfs1 0 0 0 0
。
$ iostat -xtc
extended device statistics tty cpu
device r/s w/s kr/s kw/s wait actv svc_t %w %b tin tout us sy wt id
lofi126 0.0 0.0 0.0 0.0 0.0 0.0 7.6 0 0 0 406 23 11 0 66
md200 0.0 0.0 0.0 0.0 0.0 0.0 17.8 0 0
md201 0.0 0.0 0.0 0.0 0.0 0.0 8.5 0 0
md202 0.0 0.0 0.0 0.0 0.0 0.0 16.4 0 0
md210 0.0 0.0 0.0 0.0 0.0 0.0 6.0 0 0
md211 0.0 0.0 0.0 0.0 0.0 0.0 5.1 0 0
md212 0.0 0.0 0.0 0.0 0.0 0.0 7.0 0 0
md230 0.0 0.0 0.0 0.0 0.0 0.0 12.5 0 0
md231 0.0 0.0 0.0 0.0 0.0 0.0 17.3 0 0
md232 0.0 0.0 0.0 0.0 0.0 0.0 16.6 0 0
md240 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
md241 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
md242 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
md250 1.0 0.9 13.2 2.5 0.0 0.0 9.7 0 0
md251 0.5 0.9 6.6 2.5 0.0 0.0 7.9 0 0
md252 0.5 0.9 6.6 2.5 0.0 0.0 9.4 0 0
md260 1.1 1.2 32.7 4.0 0.0 0.0 8.5 0 1
md261 0.5 1.2 16.4 4.0 0.0 0.0 6.2 0 1
md262 0.5 1.2 16.3 4.0 0.0 0.0 7.0 0 1
md400 10.1 15.1 209.3 160.6 0.0 0.8 32.1 1 9
md401 5.1 15.1 104.7 160.6 0.0 0.7 32.2 0 7
md402 5.1 15.1 104.6 160.6 0.0 0.7 32.7 0 7
md403 0.7 0.8 27.3 7.7 0.0 0.0 9.2 0 1
md404 0.1 0.0 2.2 0.0 0.0 0.0 2.5 0 0
md405 9.4 14.0 179.8 148.9 0.0 0.8 33.8 0 8
md500 6.7 278.3 101.4 4065.8 0.0 0.3 1.2 0 8
sd0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
sd1 1.5 2.2 23.2 6.5 0.0 0.0 6.1 0 1
sd2 1.4 4.7 23.1 7.8 0.0 0.1 8.8 0 3
sd3 5.3 15.2 104.8 160.6 0.4 0.3 31.6 1 7
sd4 5.3 15.2 104.7 160.6 0.4 0.3 32.2 1 7
sd5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
sd6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
sd7 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
sd8 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
sd15 3.9 18.3 62.7 245.9 0.0 0.0 0.6 0 1
sd16 3.4 18.3 62.4 246.1 0.0 0.0 0.6 0 1
sd17 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
sd18 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
sd19 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
sd20 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
sd21 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
sd22 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
sd25 3.5 18.2 63.2 245.9 0.0 0.1 3.6 0 6
sd26 3.4 18.2 63.2 246.1 0.0 0.1 3.5 0 6
sd27 6.7 278.1 101.3 4063.1 0.1 0.2 1.1 0 8
sd28 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
sd29 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
nfs1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0