Pedro Fernandes Macedo wrote:
As I already have been saved by smart , I use smartd even if it decreases performance. Later I'm gonna reboot on FC1 to update it and I'm gonna run some hdparm tests and some copy tests..
I'll let you guys know the results as soon as I have them...
-- Pedro Macedo
I did some tests here , both under FC 1 and FC2. My motherboard (Asus A7N8X-Deluxe) doesnt have the option to disable SMART , so I only could test disabling smartd... As expected , the difference between the results isn't impressive... To test , I copied a 422mb iso file from a vfat partition on hdc to a ext3 partition on hdb and also copied a 339Mb folder with lots of small files from a vfat partition on hdc to a ext3 partition on hdb. The test script was simply:
hdparm -Tt /dev/hdb /dev/hdc echo echo Iso Copy echo time cp /mnt/void/cd1.iso /home/temp echo echo Directory Copy echo time cp -R /mnt/void/directory /home/temp
And the results...
FC1 kernel 2.4.22-1.2174.nptl Smartd enabled: [root@tirael root]# bash script
/dev/hdb: Timing buffer-cache reads: 1272 MB in 2.00 seconds = 636.00 MB/sec Timing buffered disk reads: 122 MB in 3.02 seconds = 40.40 MB/sec
/dev/hdc: Timing buffer-cache reads: 1276 MB in 2.00 seconds = 638.00 MB/sec Timing buffered disk reads: 124 MB in 3.00 seconds = 41.33 MB/sec
Iso Copy
real 0m18.909s user 0m0.060s sys 0m5.370s
Directory Copy
real 0m13.838s user 0m0.060s sys 0m3.370s
[root@tirael root]#
FC1 kernel 2.4.22-1.2174.nptl Smartd disabled:
[root@tirael root]# bash script
/dev/hdb: Timing buffer-cache reads: 1304 MB in 2.00 seconds = 652.00 MB/sec Timing buffered disk reads: 122 MB in 3.01 seconds = 40.53 MB/sec
/dev/hdc: Timing buffer-cache reads: 1304 MB in 2.00 seconds = 652.00 MB/sec Timing buffered disk reads: 124 MB in 3.04 seconds = 40.79 MB/sec
Iso Copy
real 0m18.924s user 0m0.080s sys 0m4.330s
Directory Copy
real 0m13.964s user 0m0.070s sys 0m3.220s
[root@tirael root]#
Fedora Core 2 Test 1 kernel 2.6.3-2.1.238 Smartd disabled
[root@tirael root]# bash script
/dev/hdb:
Timing buffer-cache reads: 1188 MB in 2.00 seconds = 594.00 MB/sec
Timing buffered disk reads: 122 MB in 3.02 seconds = 40.40 MB/sec
/dev/hdc: Timing buffer-cache reads: 1160 MB in 2.00 seconds = 580.00 MB/sec Timing buffered disk reads: 120 MB in 3.02 seconds = 39.74 MB/sec
Iso Copy
real 0m20.549s
user 0m0.300s
sys 0m7.450s
Directory Copy
real 0m19.326s
user 0m0.280s
sys 0m6.390s
[root@tirael root]#
Fedora Core 2 Test 1 kernel 2.6.3-2.1.238 Smartd enabled
[root@tirael root]# bash script
/dev/hdb:
Timing buffer-cache reads: 1172 MB in 2.00 seconds = 586.00 MB/sec
Timing buffered disk reads: 120 MB in 3.02 seconds = 39.74 MB/sec
/dev/hdc: Timing buffer-cache reads: 1156 MB in 2.00 seconds = 578.00 MB/sec Timing buffered disk reads: 118 MB in 3.04 seconds = 38.82 MB/sec
Iso Copy
real 0m20.797s
user 0m0.270s
sys 0m7.780s
Directory Copy
real 0m19.590s
user 0m0.270s
sys 0m6.440s
[root@tirael root]#
-- Pedro Macedo
