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SCSI Performance on Dual Opteron 244 4G

18:03:21  up 116 days,  3:05,  1 user,  load average: 0.78, 1.05, 1.00
192 processes: 190 sleeping, 1 running, 1 zombie, 0 stopped
CPU states:  cpu    user    nice  system    irq  softirq  iowait    idle
          total    9.0%    0.0%    2.9%   0.0%     0.4%    8.4%   78.8%
          cpu00   10.1%    0.1%    3.3%   0.0%     0.1%   12.7%   73.2%
          cpu01    7.9%    0.0%    2.5%   0.0%     0.7%    4.1%   84.4%
Mem:  3538168k av, 3127276k used,  410892k free,       0k shrd,  219364k buff
                  1705180k actv,  851480k in_d,   40724k in_c
Swap: 2040244k av, 280k used, 2039964k free, 1454620k cached

root@r1 [~/trungson/shells]# hdparm -tT /dev/sda
/dev/sda:
Timing buffer-cache reads:   2532 MB in  2.00 seconds = 1266.00 MB/sec
Timing buffered disk reads:   50 MB in  3.12 seconds =  16.03 MB/sec

Might be some problem w/ the disk reads

Get bandwidth/traffic stats

hdparm benchmark results

[ #? 73G SCSI ]
root@ [~]# more /var/log/dmesg
Vendor: FUJITSU   Model: MAP3735NP         Rev: 0106
Type:   Direct-Access                      ANSI SCSI revision: 03
SCSI device sda: 143571316 512-byte hdwr sectors (73509 MB)

root@ [~]# hdparm -tT /dev/sda
/dev/sda:
Timing buffer-cache reads:   1180 MB in  2.00 seconds = 590.00 MB/sec
Timing buffered disk reads:  152 MB in  3.01 seconds =  50.50 MB/sec

[ #22 36G SCSI ]
Vendor: FUJITSU   Model: MAP3367NP         Rev: 0108
Type:   Direct-Access                      ANSI SCSI revision: 03
SCSI device sda: 71775284 512-byte hdwr sectors (36749 MB)

[root@]# hdparm -tT /dev/sda
/dev/sda:
 Timing cached reads:   2836 MB in  2.00 seconds = 1416.80 MB/sec
 Timing buffered disk reads:  106 MB in  3.02 seconds =  35.12 MB/sec

[ #11 73G SCSI ]
Vendor: SEAGATE   Model: ST373207LW        Rev: 0003
Type:   Direct-Access                      ANSI SCSI revision: 03
SCSI device sda: 143374744 512-byte hdwr sectors (73408 MB)

root@ [~]# hdparm -tT /dev/sda
/dev/sda:
 Timing buffer-cache reads:   3228 MB in  2.00 seconds = 1614.00 MB/sec
 Timing buffered disk reads:   74 MB in  3.07 seconds =  24.10 MB/sec

[ #215 73G SCSI x4 RAID 10 ]
Vendor: SEAGATE   Model: ST373455SS        Rev: 0002
Type:   Direct-Access                      ANSI SCSI revision: 05

/dev/sda:
 Timing cached reads:   8692 MB in  2.00 seconds = 4350.98 MB/sec
 Timing buffered disk reads:  718 MB in  3.01 seconds = 238.91 MB/sec

[ Intel SSD 120G ]
product: INTEL SSDSC2CW12
version: 400i
size: 111GiB (120GB)

[root@server]# hdparm -tT /dev/sda
/dev/sda:
 Timing cached reads:   25916 MB in  2.00 seconds = 12979.59 MB/sec
 Timing buffered disk reads:  1026 MB in  3.00 seconds = 341.75 MB/sec