AACRAID Issue on Dell 2650 RHEL3 update 6

[Patrick_Boyd at Dell.com]

I would recommend updating the PERC firmware. The latest is 2.8.1.7692.

From: linux-poweredge-bounces at dell.com
[mailto:linux-poweredge-bounces at dell.com] On Behalf Of Santhosh kumar
Sent: Friday, November 30, 2007 3:34 AM
To: linux-poweredge-Lists
Cc: linux-poweredge-bounces-Lists
Subject: AACRAID Issue on Dell 2650 RHEL3 update 6

 

All, 

 

Dell 2650 servers running Redhat 3 update 6 w/AACRAID driver are
performing poorly -- High I/O wait, system
sluggishness/non-responsiveness with disk access. This problem can be
duplicated with this command dd if=/dev/zero of=testfile bs=1G count=10.
I have attached the top output below. At present we are not in position
to upgrade the Kernel. 

  

I have tried to resolve this issue by disabling the Hyper threading and
changing the PERC card settings to WRITE_BACK and CACHED_IO from the
default WRITE_THRU and Direct_IO.

 

Please help me to reslove this isse 

 

Here are my server details. 

[root at stpesx12 root]# uname -r

2.4.21-37.ELsmp

[root at stpesx12 root]# dmesg |grep AAC

AAC 0: kernel 2.8-0 build 6089

AAC 0: monitor 2.8-0 build 6089

AAC 0: bios 2.8-0 build 6089

AAC 0: serial 727620d3

AAC 0: 64 Bit DAC enabled

[root at stpesx12 root]# dmesg |grep aac

Red Hat/Adaptec aacRAID driver (1.1-5[2361])

 

09:33:51   up  3:12 ,  3 users,  load average: 0.69, 0.15, 0.05

62 processes: 60 sleeping, 2 running, 0 zombie, 0 stopped 

CPU states:  cpu     user    nice  system    irq  softirq  iowait
idle

           total    0.1%    0.0%     7.2%   0.0%     0.3%   92.2%
0.0%

           cpu00    0.0%    0.0%    2.1%   0.0%      0.0%   97.8%
0.0%

           cpu01    0.0%    0.0%   25.0%   0.0%      1.1%   73.7%
0.0%

           cpu02    0.1%    0.0%    1.5%   0.0%      0.2%   98.0%
0.0%

           cpu03    0.3%    0.0%    0.1%    0.0%     0.0%   99.4%
0.0%

Mem:  5907384k av, 5889296k used,    18088k free,       0k shrd,
22132k buff

                     81088k actv, 4633196k in_d,   96100k in_c

Swap: 4194296k av,       0k used, 4194296k free                 3180708k
cached

 

Thanks

Santhosh   

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