[CentOS] RAID rebuild time and disk utilization....

Tom Bishop bishoptf at gmail.com
Mon Sep 27 11:15:14 EDT 2010


So I'm in the process of building and testing a raid setup and it appeared
to take along time to build I came across some settings for setting the min
amount of time and that helped but it appears that one of the disks is
struggling  (100 utilization) vs the other one...I was wondering if anyone
else has seen this and if so, is their a solution for it...my 2 disks are 1
Samsung F3 1tb /dev/sdb and 1 Seagate 7200.12 1Tb /dev/sdc...smartctl looks
good on both....


sar -dbpqu -P ALL 60 1
Linux 2.6.18-194.11.4.el5 (dpcserver)   09/27/2010

10:09:41 AM       CPU     %user     %nice   %system   %iowait    %steal
%idle
10:10:41 AM       all      0.03      0.00      1.11      0.00      0.00
98.86
10:10:41 AM         0      0.00      0.00      0.00      0.00      0.00
100.00
10:10:41 AM         1      0.10      0.00      1.25      0.00      0.00
98.65
10:10:41 AM         2      0.00      0.00      3.18      0.02      0.00
96.80
10:10:41 AM         3      0.00      0.00      0.02      0.00      0.00
99.98

10:09:41 AM       tps      rtps      wtps   bread/s   bwrtn/s
10:10:41 AM    838.27    836.41      1.87 107059.98     32.54

10:09:41 AM       DEV       tps  rd_sec/s  wr_sec/s  avgrq-sz  avgqu-sz
await     svctm     %util
10:10:41 AM       sda      0.93      0.00     16.27     17.43      0.00
2.12      0.29      0.03
10:10:41 AM      sda1      0.00      0.00      0.00      0.00      0.00
0.00      0.00      0.00
10:10:41 AM      sda2      0.00      0.00      0.00      0.00      0.00
0.00      0.00      0.00
10:10:41 AM      sda3      0.93      0.00     16.27     17.43      0.00
2.12      0.29      0.03
10:10:41 AM       sdb    209.10  26764.99      0.00    128.00     30.90
148.02      4.78    100.02
10:10:41 AM      sdb1    209.10  26764.99      0.00    128.00     30.90
148.02      4.78    100.02
10:10:41 AM       sdc    209.10  26764.99      0.00    128.00      0.41
1.94      0.60     12.57
10:10:41 AM      sdc1    209.10  26764.99      0.00    128.00      0.41
1.94      0.60     12.57
10:10:41 AM       md0      0.00      0.00      0.00      0.00      0.00
0.00      0.00      0.00

10:09:41 AM   runq-sz  plist-sz   ldavg-1   ldavg-5  ldavg-15
10:10:41 AM         0       167      1.02      1.03      1.00



Thanks in advance.....
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