linux read/write average speed

S

secure.boy

Limp Gawd
Joined
Oct 22, 2007
Messages
474
[root@localhost ~]# hdparm -tT /dev/sda
Code: 
/dev/sda:
 Timing cached reads:   7196 MB in  1.99 seconds = 3607.57 MB/sec
 Timing buffered disk reads:  218 MB in  3.02 seconds =  72.10 MB/sec
[root@localhost ~]#
 
st3320620as on server one
Code: 
/dev/sda:
 Timing cached reads:   3712 MB in  2.00 seconds = 1856.61 MB/sec
 Timing buffered disk reads:  182 MB in  3.02 seconds =  60.32 MB/sec
st3320620as on server two
Code: 
/dev/sda:
 Timing cached reads:   2042 MB in  2.00 seconds = 1021.01 MB/sec
 Timing buffered disk reads:  224 MB in  3.01 seconds =  74.36 MB/sec
hd501lj on server two
Code: 
/dev/sdb:
 Timing cached reads:   2028 MB in  2.00 seconds = 1014.76 MB/sec
 Timing buffered disk reads:  246 MB in  3.02 seconds =  81.42 MB/sec
hd703lj on server one
Code: 
/dev/sdm:
 Timing cached reads:   3320 MB in  2.00 seconds = 1660.93 MB/sec
 Timing buffered disk reads:  260 MB in  3.01 seconds =  86.48 MB/sec
Code: 
/dev/sdn:
 Timing cached reads:   3728 MB in  2.00 seconds = 1864.52 MB/sec
 Timing buffered disk reads:  286 MB in  3.01 seconds =  95.12 MB/sec
 
tgrimley said:
Hmmmm, what disk is that?
Click to expand...
sata how swap 500GB

asgards said:
st3320620as on server one
Code: 
/dev/sda:
 Timing cached reads:   3712 MB in  2.00 seconds = 1856.61 MB/sec
 Timing buffered disk reads:  182 MB in  3.02 seconds =  60.32 MB/sec
st3320620as on server two
Code: 
/dev/sda:
 Timing cached reads:   2042 MB in  2.00 seconds = 1021.01 MB/sec
 Timing buffered disk reads:  224 MB in  3.01 seconds =  74.36 MB/sec
hd501lj on server two
Code: 
/dev/sdb:
 Timing cached reads:   2028 MB in  2.00 seconds = 1014.76 MB/sec
 Timing buffered disk reads:  246 MB in  3.02 seconds =  [COLOR="Red"]81.42 MB/sec[/COLOR]
hd703lj on server one
Code: 
/dev/sdm:
 Timing cached reads:   3320 MB in  2.00 seconds = 1660.93 MB/sec
 Timing buffered disk reads:  260 MB in  3.01 seconds =  [COLOR="Red"]86.48 MB/sec[/COLOR]
Code: 
/dev/sdn:
 Timing cached reads:   3728 MB in  2.00 seconds = 1864.52 MB/sec
 Timing buffered disk reads:  286 MB in  3.01 seconds =  [COLOR="Red"]95.12 MB/sec[/COLOR]
Click to expand...

sata with 16M cache?
 
Code: 
/dev/sda:
 Timing cached reads:   10920 MB in  2.00 seconds = 5467.99 MB/sec
 Timing buffered disk reads:  162 MB in  3.00 seconds =  53.96 MB/sec
Why do you think this is an interesting benchmark? The first part is mostly memory bandwidth, and the second is a small sequential read.
 
Code: 
/dev/hda:
 Timing cached reads:   1050 MB in  2.00 seconds = 524.53 MB/sec
 Timing buffered disk reads:  136 MB in  3.00 seconds =  45.28 MB/sec

/dev/hdb:
 Timing cached reads:   1082 MB in  2.00 seconds = 540.36 MB/sec
 Timing buffered disk reads:  176 MB in  3.01 seconds =  58.46 MB/sec

/dev/sda:
 Timing cached reads:   1000 MB in  2.00 seconds = 499.65 MB/sec
 Timing buffered disk reads:  196 MB in  3.06 seconds =  64.01 MB/sec

/dev/sdb:
 Timing cached reads:   1018 MB in  2.00 seconds = 508.60 MB/sec
 Timing buffered disk reads:  202 MB in  3.02 seconds =  66.82 MB/sec

/dev/sdd:
 Timing cached reads:   1022 MB in  2.00 seconds = 510.76 MB/sec
 Timing buffered disk reads:  196 MB in  3.02 seconds =  64.92 MB/sec

/dev/sdc:
 Timing cached reads:   1122 MB in  2.00 seconds = 560.40 MB/sec
 Timing buffered disk reads:  202 MB in  3.03 seconds =  66.70 MB/sec

/dev/md0:
 Timing cached reads:   1050 MB in  2.00 seconds = 524.62 MB/sec
 Timing buffered disk reads:  310 MB in  3.02 seconds = 102.78 MB/sec

Drives are:

Code: 
/dev/hda: ST3200822A: 30°C
/dev/hdb: Maxtor 7B250R0: 29°C
/dev/sda: SAMSUNG HD501LJ: 31°C
/dev/sdb: SAMSUNG HD501LJ: 31°C
/dev/sdc: SAMSUNG HD501LJ: 30°C
/dev/sdd: SAMSUNG HD501LJ: 31°C
 
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