mjhjmtu

i want to get the read and write, service time, queue length and wait time of my disks. the OS is CentOS 6. i use iosts. when i run this command:

iostat -x -d /dev/sda

the output is:

 Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util 
 sda 4.04 272.41 21.63 58.30 7565.96 3037.79 132.66 0.06 0.74 0.66 5.26 

which return the total value since system been up. but i want disk information at time. for that i should run iostat -x -d /dev/sda 1 2.

the output is :

Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util
sda 4.04 272.40 21.63 58.30 7565.86 3037.75 132.66 0.06 0.74 0.66 5.26
Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util
sda 0.00 11.00 0.00 12.00 0.00 184.00 15.33 0.32 26.75 3.08 3.70 

which the second part shows what i want. is there any way to get those information directly without 1 2? i searched man page but didnt find anything. or is there any other way to get those information instead of iostat? (and i cant install new packages on systems -_-).