| mande01 |
11-10-2011 03:47 PM |
Guidance for a Slow Raid 1 system
Do i have a slow raid system?
I have a system and I don't know what to check on the raid log files.
cat /proc/version
Code:
Linux version 2.6.22.18-Netgear (mostafah@es5x86.axentra.com) (gcc version 4.2.1) #16 Sun Jun 13 19:54:46 EDT 2010
It is a Netgear Stora with two 1.5 tb hard drives.
Code:
/usr/sbin/smartctl -a /dev/sda
smartctl version 5.38 [armv5tel-redhat-linux-gnueabi] Copyright (C) 2002-8 Bruce Allen
Home page is http://smartmontools.sourceforge.net/
Device: WDC WD15EADS-00P8B0 Version: 01.0
Device type: disk
Local Time is: Thu Nov 10 21:40:55 2011 GMT
Device does not support SMART
Error Counter logging not supported
Device does not support Self Test logging
/usr/sbin/smartctl -a /dev/sdb
smartctl version 5.38 [armv5tel-redhat-linux-gnueabi] Copyright (C) 2002-8 Bruce Allen
Home page is http://smartmontools.sourceforge.net/
Device: WDC WD15EADS-00P8B0 Version: 01.0
Device type: disk
Local Time is: Thu Nov 10 21:41:21 2011 GMT
Device does not support SMART
Error Counter logging not supported
Device does not support Self Test logging
cat /proc/mdstat
Code:
Personalities : [linear] [raid0] [raid1] [raid6] [raid5] [raid4]
md0 : active raid1 sdb1[1] sda1[0]
1464843648 blocks [2/2] [UU]
mdadm --detail /dev/md0 gives:
Code:
/dev/md0:
Version : 00.90.03
Creation Time : Fri Oct 21 20:50:48 2011
Raid Level : raid1
Array Size : 1464843648 (1396.98 GiB 1500.00 GB)
Used Dev Size : 1464843648 (1396.98 GiB 1500.00 GB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 0
Persistence : Superblock is persistent
Update Time : Thu Nov 10 05:04:10 2011
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
UUID : cf297b8c:35bb5a35:6c25913b:c0261e4e
Events : 0.12
Number Major Minor RaidDevice State
0 8 1 0 active sync /dev/sda1
1 8 17 1 active sync /dev/sdb1
hdparm -tT /dev/sda1
Code:
/dev/sda1:
Timing cached reads: 332 MB in 2.01 seconds = 165.31 MB/sec
Timing buffered disk reads: 98 MB in 3.08 seconds = 31.87 MB/sec
hdparm -tT /dev/sda1
Code:
/dev/sdb1:
Timing cached reads: 346 MB in 2.01 seconds = 172.12 MB/sec
Timing buffered disk reads: 128 MB in 3.03 seconds = 42.26 MB/sec
hdparm -tT /dev/md0
Code:
/dev/md0:
Timing cached reads: 330 MB in 2.01 seconds = 164.51 MB/sec
Timing buffered disk reads: 76 MB in 3.06 seconds = 24.84 MB/sec
Code:
/sbin/hdparm -t /dev/md0
/dev/md0:
Timing buffered disk reads: 38 MB in 3.34 seconds = 11.39 MB/sec
/sbin/hdparm -t /dev/sda1
/dev/sda1:
Timing buffered disk reads: 124 MB in 3.03 seconds = 40.99 MB/sec
/sbin/hdparm -t /dev/sdb1
/dev/sdb1:
Timing buffered disk reads: 180 MB in 3.02 seconds = 59.61 MB/sec
Why is my raid so slow?
What should I check.
Thanks.
Derry |
