slow performance on company production server I need help

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Hello Everyone,

Since rebooting my Centos 6.10 Openvz server "daisy" yesterday, I am
getting horrible system performance.  /var/log/messages is full of
HDIO_GET_IDENTITY failed for /dev/sdb.  The latest entries look like this:

Apr 22 08:51:32 daisy kernel: [141224.655699] CT: 1005: stopped
Apr 22 08:55:04 daisy ata_id[21513]: HDIO_GET_IDENTITY failed for '/dev/sdb'
Apr 22 09:00:05 daisy ata_id[21584]: HDIO_GET_IDENTITY failed for '/dev/sdb'
Apr 22 09:05:02 daisy ata_id[21644]: HDIO_GET_IDENTITY failed for '/dev/sdb'
Apr 22 09:10:01 daisy ata_id[22282]: HDIO_GET_IDENTITY failed for '/dev/sdb'
Apr 22 09:11:49 daisy kernel: [142441.721065] INFO: task hdparm:22246
blocked for more than 120 seconds.
Apr 22 09:11:49 daisy kernel: [142441.721083]       Not tainted
2.6.32-042stab142.1 #1
Apr 22 09:11:49 daisy kernel: [142441.721093] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Apr 22 09:11:49 daisy kernel: [142441.721109] hdparm        D
ffff88000c778300     0 22246  20845    0 0x00000080
Apr 22 09:11:49 daisy kernel: [142441.721115]  ffff88006654bcb8
0000000000000086 ffffffff8114f130 ffff88002821fa40
Apr 22 09:11:49 daisy kernel: [142441.721121]  ffff88000004d238
ffff88006654bd70 ffff88006654bc88 ffffea00016ab7c0
Apr 22 09:11:49 daisy kernel: [142441.721125]  ffff88011a707000
ffff880028321168 000000000001b7ea 0000816be9b3faa2
Apr 22 09:11:49 daisy kernel: [142441.721130] Call Trace:
Apr 22 09:11:49 daisy kernel: [142441.721139]  [<ffffffff8114f130>] ?
sync_page+0x0/0x50
Apr 22 09:11:49 daisy kernel: [142441.721144]  [<ffffffff8107c851>] ?
update_curr+0xe1/0x1f0
Apr 22 09:11:49 daisy kernel: [142441.721149]  [<ffffffff81566c55>]
schedule_timeout+0x215/0x2f0
Apr 22 09:11:49 daisy kernel: [142441.721155]  [<ffffffff81067432>] ?
check_preempt_curr+0x82/0xa0
Apr 22 09:11:49 daisy kernel: [142441.721159]  [<ffffffff815669b4>]
wait_for_completion+0xe4/0x120
Apr 22 09:11:49 daisy kernel: [142441.721162]  [<ffffffff81071ce0>] ?
default_wake_function+0x0/0x20
Apr 22 09:11:49 daisy kernel: [142441.721167]  [<ffffffff815694db>] ?
_spin_unlock_bh+0x1b/0x20
Apr 22 09:11:49 daisy kernel: [142441.721172]  [<ffffffff811f98d8>]
sync_inodes_sb_ub+0xa8/0x1d0
Apr 22 09:11:49 daisy kernel: [142441.721176]  [<ffffffff8114fa6f>] ?
filemap_fdatawait+0x2f/0x40
Apr 22 09:11:49 daisy kernel: [142441.721181]  [<ffffffff81200f85>]
__sync_filesystem+0x95/0xa0
Apr 22 09:11:49 daisy kernel: [142441.721184]  [<ffffffff8120151d>]
sync_filesystems+0x30d/0x350
Apr 22 09:11:49 daisy kernel: [142441.721188]  [<ffffffff812016e5>]
sys_sync+0x155/0x1a0
Apr 22 09:11:49 daisy kernel: [142441.721192]  [<ffffffff81571424>]
system_call_fastpath+0x22/0x3a
Apr 22 09:13:49 daisy kernel: [142561.721069] INFO: task hdparm:22246
blocked for more than 120 seconds.
Apr 22 09:13:49 daisy kernel: [142561.721087]       Not tainted
2.6.32-042stab142.1 #1
Apr 22 09:13:49 daisy kernel: [142561.721096] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Apr 22 09:13:49 daisy kernel: [142561.721112] hdparm        D
ffff88000c778300     0 22246  20845    0 0x00000080
Apr 22 09:13:49 daisy kernel: [142561.721118]  ffff88006654bcb8
0000000000000086 ffffffff8114f130 ffff88002821fa40
Apr 22 09:13:49 daisy kernel: [142561.721123]  ffff88000004d238
ffff88006654bd70 ffff88006654bc88 ffffea00016ab7c0
Apr 22 09:13:49 daisy kernel: [142561.721128]  ffff88011a707000
ffff880028321168 000000000001b7ea 0000816be9b3faa2
Apr 22 09:13:49 daisy kernel: [142561.721133] Call Trace:
Apr 22 09:13:49 daisy kernel: [142561.721142]  [<ffffffff8114f130>] ?
sync_page+0x0/0x50
Apr 22 09:13:49 daisy kernel: [142561.721148]  [<ffffffff8107c851>] ?
update_curr+0xe1/0x1f0
Apr 22 09:13:49 daisy kernel: [142561.721153]  [<ffffffff81566c55>]
schedule_timeout+0x215/0x2f0
Apr 22 09:13:49 daisy kernel: [142561.721158]  [<ffffffff81067432>] ?
check_preempt_curr+0x82/0xa0
Apr 22 09:13:49 daisy kernel: [142561.721162]  [<ffffffff815669b4>]
wait_for_completion+0xe4/0x120
Apr 22 09:13:49 daisy kernel: [142561.721166]  [<ffffffff81071ce0>] ?
default_wake_function+0x0/0x20
Apr 22 09:13:49 daisy kernel: [142561.721170]  [<ffffffff815694db>] ?
_spin_unlock_bh+0x1b/0x20
Apr 22 09:13:49 daisy kernel: [142561.721176]  [<ffffffff811f98d8>]
sync_inodes_sb_ub+0xa8/0x1d0
Apr 22 09:13:49 daisy kernel: [142561.721180]  [<ffffffff8114fa6f>] ?
filemap_fdatawait+0x2f/0x40
Apr 22 09:13:49 daisy kernel: [142561.721184]  [<ffffffff81200f85>]
__sync_filesystem+0x95/0xa0
Apr 22 09:13:49 daisy kernel: [142561.721188]  [<ffffffff8120151d>]
sync_filesystems+0x30d/0x350
Apr 22 09:13:49 daisy kernel: [142561.721192]  [<ffffffff812016e5>]
sys_sync+0x155/0x1a0
Apr 22 09:13:49 daisy kernel: [142561.721196]  [<ffffffff81571424>]
system_call_fastpath+0x22/0x3a
Apr 22 09:15:06 daisy ata_id[22299]: HDIO_GET_IDENTITY failed for '/dev/sdb'
Apr 22 09:15:49 daisy kernel: [142681.721085] INFO: task hdparm:22246
blocked for more than 120 seconds.
Apr 22 09:15:49 daisy kernel: [142681.721104]       Not tainted
2.6.32-042stab142.1 #1
Apr 22 09:15:49 daisy kernel: [142681.721113] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Apr 22 09:15:49 daisy kernel: [142681.721129] hdparm        D
ffff88000c778300     0 22246  20845    0 0x00000080
Apr 22 09:15:49 daisy kernel: [142681.721136]  ffff88006654bcb8
0000000000000086 ffffffff8114f130 ffff88002821fa40
Apr 22 09:15:49 daisy kernel: [142681.721141]  ffff88000004d238
ffff88006654bd70 ffff88006654bc88 ffffea00016ab7c0
Apr 22 09:15:49 daisy kernel: [142681.721146]  ffff88011a707000
ffff880028321168 000000000001b7ea 0000816be9b3faa2
Apr 22 09:15:49 daisy kernel: [142681.721150] Call Trace:
Apr 22 09:15:49 daisy kernel: [142681.721160]  [<ffffffff8114f130>] ?
sync_page+0x0/0x50
Apr 22 09:15:49 daisy kernel: [142681.721166]  [<ffffffff8107c851>] ?
update_curr+0xe1/0x1f0
Apr 22 09:15:49 daisy kernel: [142681.721172]  [<ffffffff81566c55>]
schedule_timeout+0x215/0x2f0
Apr 22 09:15:49 daisy kernel: [142681.721178]  [<ffffffff81067432>] ?
check_preempt_curr+0x82/0xa0
Apr 22 09:15:49 daisy kernel: [142681.721182]  [<ffffffff815669b4>]
wait_for_completion+0xe4/0x120
Apr 22 09:15:49 daisy kernel: [142681.721185]  [<ffffffff81071ce0>] ?
default_wake_function+0x0/0x20
Apr 22 09:15:49 daisy kernel: [142681.721190]  [<ffffffff815694db>] ?
_spin_unlock_bh+0x1b/0x20
Apr 22 09:15:49 daisy kernel: [142681.721196]  [<ffffffff811f98d8>]
sync_inodes_sb_ub+0xa8/0x1d0
Apr 22 09:15:49 daisy kernel: [142681.721200]  [<ffffffff8114fa6f>] ?
filemap_fdatawait+0x2f/0x40
Apr 22 09:15:49 daisy kernel: [142681.721204]  [<ffffffff81200f85>]
__sync_filesystem+0x95/0xa0
Apr 22 09:15:49 daisy kernel: [142681.721208]  [<ffffffff8120151d>]
sync_filesystems+0x30d/0x350
Apr 22 09:15:49 daisy kernel: [142681.721212]  [<ffffffff812016e5>]
sys_sync+0x155/0x1a0
Apr 22 09:15:49 daisy kernel: [142681.721217]  [<ffffffff81571424>]
system_call_fastpath+0x22/0x3a
Apr 22 09:17:49 daisy kernel: [142801.721064] INFO: task hdparm:22246
blocked for more than 120 seconds.
Apr 22 09:17:49 daisy kernel: [142801.721082]       Not tainted
2.6.32-042stab142.1 #1
Apr 22 09:17:49 daisy kernel: [142801.721091] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Apr 22 09:17:49 daisy kernel: [142801.721107] hdparm        D
ffff88000c778300     0 22246  20845    0 0x00000080
Apr 22 09:17:49 daisy kernel: [142801.721114]  ffff88006654bcb8
0000000000000086 ffffffff8114f130 ffff88002821fa40
Apr 22 09:17:49 daisy kernel: [142801.721119]  ffff88000004d238
ffff88006654bd70 ffff88006654bc88 ffffea00016ab7c0
Apr 22 09:17:49 daisy kernel: [142801.721124]  ffff88011a707000
ffff880028321168 000000000001b7ea 0000816be9b3faa2
Apr 22 09:17:49 daisy kernel: [142801.721128] Call Trace:
Apr 22 09:17:49 daisy kernel: [142801.721137]  [<ffffffff8114f130>] ?
sync_page+0x0/0x50
Apr 22 09:17:49 daisy kernel: [142801.721143]  [<ffffffff8107c851>] ?
update_curr+0xe1/0x1f0
Apr 22 09:17:49 daisy kernel: [142801.721149]  [<ffffffff81566c55>]
schedule_timeout+0x215/0x2f0
Apr 22 09:17:49 daisy kernel: [142801.721154]  [<ffffffff81067432>] ?
check_preempt_curr+0x82/0xa0
Apr 22 09:17:49 daisy kernel: [142801.721158]  [<ffffffff815669b4>]
wait_for_completion+0xe4/0x120
Apr 22 09:17:49 daisy kernel: [142801.721162]  [<ffffffff81071ce0>] ?
default_wake_function+0x0/0x20
Apr 22 09:17:49 daisy kernel: [142801.721166]  [<ffffffff815694db>] ?
_spin_unlock_bh+0x1b/0x20
Apr 22 09:17:49 daisy kernel: [142801.721172]  [<ffffffff811f98d8>]
sync_inodes_sb_ub+0xa8/0x1d0
Apr 22 09:17:49 daisy kernel: [142801.721176]  [<ffffffff8114fa6f>] ?
filemap_fdatawait+0x2f/0x40
Apr 22 09:17:49 daisy kernel: [142801.721180]  [<ffffffff81200f85>]
__sync_filesystem+0x95/0xa0
Apr 22 09:17:49 daisy kernel: [142801.721184]  [<ffffffff8120151d>]
sync_filesystems+0x30d/0x350
Apr 22 09:17:49 daisy kernel: [142801.721188]  [<ffffffff812016e5>]
sys_sync+0x155/0x1a0
Apr 22 09:17:49 daisy kernel: [142801.721192]  [<ffffffff81571424>]
system_call_fastpath+0x22/0x3a
Apr 22 09:20:01 daisy ata_id[22405]: HDIO_GET_IDENTITY failed for '/dev/sdb'
Apr 22 09:21:49 daisy kernel: [143041.721494] INFO: task hdparm:22246
blocked for more than 120 seconds.
Apr 22 09:21:49 daisy kernel: [143041.721512]       Not tainted
2.6.32-042stab142.1 #1
Apr 22 09:21:49 daisy kernel: [143041.721522] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Apr 22 09:21:49 daisy kernel: [143041.721691] hdparm        D
ffff88000c778300     0 22246  20845    0 0x00000080
Apr 22 09:21:49 daisy kernel: [143041.721697]  ffff88006654bcc8
0000000000000086 ffff88006654bc58 ffffffff810098af
Apr 22 09:21:49 daisy kernel: [143041.721702]  ffff880028200000
000000001a42f238 ffff8800110101c0 ffff88011a42f200
Apr 22 09:21:49 daisy kernel: [143041.721706]  ffff88006654bc68
ffffffff8107bbfe ffff8800110101c0 0000000000000000
Apr 22 09:21:49 daisy kernel: [143041.721711] Call Trace:
Apr 22 09:21:49 daisy kernel: [143041.721720]  [<ffffffff810098af>] ?
__switch_to+0x16f/0x470
Apr 22 09:21:49 daisy kernel: [143041.721726]  [<ffffffff8107bbfe>] ?
finish_task_switch+0xce/0x120
Apr 22 09:21:49 daisy kernel: [143041.721730]  [<ffffffff8107c851>] ?
update_curr+0xe1/0x1f0
Apr 22 09:21:49 daisy kernel: [143041.721735]  [<ffffffff81566c55>]
schedule_timeout+0x215/0x2f0
Apr 22 09:21:49 daisy kernel: [143041.721739]  [<ffffffff815669b4>]
wait_for_completion+0xe4/0x120
Apr 22 09:21:49 daisy kernel: [143041.721743]  [<ffffffff81071ce0>] ?
default_wake_function+0x0/0x20
Apr 22 09:21:49 daisy kernel: [143041.721747]  [<ffffffff815694db>] ?
_spin_unlock_bh+0x1b/0x20
Apr 22 09:21:49 daisy kernel: [143041.721753]  [<ffffffff811f9773>]
writeback_inodes_sb_nr_ub+0x83/0xb0
Apr 22 09:21:49 daisy kernel: [143041.721757]  [<ffffffff811f9806>]
writeback_inodes_sb_ub+0x46/0x50
Apr 22 09:21:49 daisy kernel: [143041.721762]  [<ffffffff81200f38>]
__sync_filesystem+0x48/0xa0
Apr 22 09:21:49 daisy kernel: [143041.721765]  [<ffffffff8120151d>]
sync_filesystems+0x30d/0x350
Apr 22 09:21:49 daisy kernel: [143041.721769]  [<ffffffff812016d8>]
sys_sync+0x148/0x1a0
Apr 22 09:21:49 daisy kernel: [143041.721773]  [<ffffffff81571424>]
system_call_fastpath+0x22/0x3a
Apr 22 09:23:49 daisy kernel: [143161.721064] INFO: task hdparm:22246
blocked for more than 120 seconds.
Apr 22 09:23:49 daisy kernel: [143161.721169]       Not tainted
2.6.32-042stab142.1 #1
Apr 22 09:23:49 daisy kernel: [143161.721259] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Apr 22 09:23:49 daisy kernel: [143161.721430] hdparm        D
ffff88000c778300     0 22246  20845    0 0x00000080
Apr 22 09:23:49 daisy kernel: [143161.721437]  ffff88006654bcc8
0000000000000086 ffff88006654bc58 ffffffff810098af
Apr 22 09:23:49 daisy kernel: [143161.721442]  ffff880028200000
000000001a42f238 ffff8800110101c0 ffff88011a42f200
Apr 22 09:23:49 daisy kernel: [143161.721447]  ffff88006654bc68
ffffffff8107bbfe ffff8800110101c0 0000000000000000
Apr 22 09:23:49 daisy kernel: [143161.721451] Call Trace:
Apr 22 09:23:49 daisy kernel: [143161.721460]  [<ffffffff810098af>] ?
__switch_to+0x16f/0x470
Apr 22 09:23:49 daisy kernel: [143161.721466]  [<ffffffff8107bbfe>] ?
finish_task_switch+0xce/0x120
Apr 22 09:23:49 daisy kernel: [143161.721470]  [<ffffffff8107c851>] ?
update_curr+0xe1/0x1f0
Apr 22 09:23:49 daisy kernel: [143161.721475]  [<ffffffff81566c55>]
schedule_timeout+0x215/0x2f0
Apr 22 09:23:49 daisy kernel: [143161.721479]  [<ffffffff815669b4>]
wait_for_completion+0xe4/0x120
Apr 22 09:23:49 daisy kernel: [143161.721483]  [<ffffffff81071ce0>] ?
default_wake_function+0x0/0x20
Apr 22 09:23:49 daisy kernel: [143161.721487]  [<ffffffff815694db>] ?
_spin_unlock_bh+0x1b/0x20
Apr 22 09:23:49 daisy kernel: [143161.721493]  [<ffffffff811f9773>]
writeback_inodes_sb_nr_ub+0x83/0xb0
Apr 22 09:23:49 daisy kernel: [143161.721498]  [<ffffffff811f9806>]
writeback_inodes_sb_ub+0x46/0x50
Apr 22 09:23:49 daisy kernel: [143161.721502]  [<ffffffff81200f38>]
__sync_filesystem+0x48/0xa0
Apr 22 09:23:49 daisy kernel: [143161.721506]  [<ffffffff8120151d>]
sync_filesystems+0x30d/0x350
Apr 22 09:23:49 daisy kernel: [143161.721510]  [<ffffffff812016d8>]
sys_sync+0x148/0x1a0
Apr 22 09:23:49 daisy kernel: [143161.721514]  [<ffffffff81571424>]
system_call_fastpath+0x22/0x3a
Apr 22 09:25:02 daisy ata_id[22445]: HDIO_GET_IDENTITY failed for '/dev/sdb'
Apr 22 09:25:49 daisy kernel: [143281.721066] INFO: task hdparm:22246
blocked for more than 120 seconds.
Apr 22 09:25:49 daisy kernel: [143281.721159]       Not tainted
2.6.32-042stab142.1 #1
Apr 22 09:25:49 daisy kernel: [143281.721244] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Apr 22 09:25:49 daisy kernel: [143281.721408] hdparm        D
ffff88000c778300     0 22246  20845    0 0x00000080
Apr 22 09:25:49 daisy kernel: [143281.721415]  ffff88006654bcc8
0000000000000086 ffff88006654bc58 ffffffff810098af
Apr 22 09:25:49 daisy kernel: [143281.721420]  ffff880028200000
000000001a42f238 ffff8800110101c0 ffff88011a42f200
Apr 22 09:25:49 daisy kernel: [143281.721424]  ffff88006654bc68
ffffffff8107bbfe ffff8800110101c0 0000000000000000
Apr 22 09:25:49 daisy kernel: [143281.721429] Call Trace:
Apr 22 09:25:49 daisy kernel: [143281.721438]  [<ffffffff810098af>] ?
__switch_to+0x16f/0x470
Apr 22 09:25:49 daisy kernel: [143281.721444]  [<ffffffff8107bbfe>] ?
finish_task_switch+0xce/0x120
Apr 22 09:25:49 daisy kernel: [143281.721448]  [<ffffffff8107c851>] ?
update_curr+0xe1/0x1f0
Apr 22 09:25:49 daisy kernel: [143281.721453]  [<ffffffff81566c55>]
schedule_timeout+0x215/0x2f0
Apr 22 09:25:49 daisy kernel: [143281.721457]  [<ffffffff815669b4>]
wait_for_completion+0xe4/0x120
Apr 22 09:25:49 daisy kernel: [143281.721461]  [<ffffffff81071ce0>] ?
default_wake_function+0x0/0x20
Apr 22 09:25:49 daisy kernel: [143281.721465]  [<ffffffff815694db>] ?
_spin_unlock_bh+0x1b/0x20
Apr 22 09:25:49 daisy kernel: [143281.721471]  [<ffffffff811f9773>]
writeback_inodes_sb_nr_ub+0x83/0xb0
Apr 22 09:25:49 daisy kernel: [143281.721476]  [<ffffffff811f9806>]
writeback_inodes_sb_ub+0x46/0x50
Apr 22 09:25:49 daisy kernel: [143281.721480]  [<ffffffff81200f38>]
__sync_filesystem+0x48/0xa0
Apr 22 09:25:49 daisy kernel: [143281.721484]  [<ffffffff8120151d>]
sync_filesystems+0x30d/0x350
Apr 22 09:25:49 daisy kernel: [143281.721487]  [<ffffffff812016d8>]
sys_sync+0x148/0x1a0
Apr 22 09:25:49 daisy kernel: [143281.721492]  [<ffffffff81571424>]
system_call_fastpath+0x22/0x3a
Apr 22 09:27:49 daisy kernel: [143401.721072] INFO: task hdparm:22246
blocked for more than 120 seconds.
Apr 22 09:27:49 daisy kernel: [143401.721165]       Not tainted
2.6.32-042stab142.1 #1
Apr 22 09:27:49 daisy kernel: [143401.721253] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Apr 22 09:27:49 daisy kernel: [143401.721421] hdparm        D
ffff88000c778300     0 22246  20845    0 0x00000080
Apr 22 09:27:49 daisy kernel: [143401.721427]  ffff88006654bcc8
0000000000000086 ffff88006654bc58 ffffffff810098af
Apr 22 09:27:49 daisy kernel: [143401.721432]  ffff880028200000
000000001a42f238 ffff8800110101c0 ffff88011a42f200
Apr 22 09:27:49 daisy kernel: [143401.721436]  ffff88006654bc68
ffffffff8107bbfe ffff8800110101c0 0000000000000000
Apr 22 09:27:49 daisy kernel: [143401.721441] Call Trace:
Apr 22 09:27:49 daisy kernel: [143401.721450]  [<ffffffff810098af>] ?
__switch_to+0x16f/0x470
Apr 22 09:27:49 daisy kernel: [143401.721456]  [<ffffffff8107bbfe>] ?
finish_task_switch+0xce/0x120
Apr 22 09:27:49 daisy kernel: [143401.721460]  [<ffffffff8107c851>] ?
update_curr+0xe1/0x1f0
Apr 22 09:27:49 daisy kernel: [143401.721465]  [<ffffffff81566c55>]
schedule_timeout+0x215/0x2f0
Apr 22 09:27:49 daisy kernel: [143401.721469]  [<ffffffff815669b4>]
wait_for_completion+0xe4/0x120
Apr 22 09:27:49 daisy kernel: [143401.721473]  [<ffffffff81071ce0>] ?
default_wake_function+0x0/0x20
Apr 22 09:27:49 daisy kernel: [143401.721477]  [<ffffffff815694db>] ?
_spin_unlock_bh+0x1b/0x20
Apr 22 09:27:49 daisy kernel: [143401.721483]  [<ffffffff811f9773>]
writeback_inodes_sb_nr_ub+0x83/0xb0
Apr 22 09:27:49 daisy kernel: [143401.721487]  [<ffffffff811f9806>]
writeback_inodes_sb_ub+0x46/0x50
Apr 22 09:27:49 daisy kernel: [143401.721492]  [<ffffffff81200f38>]
__sync_filesystem+0x48/0xa0
Apr 22 09:27:49 daisy kernel: [143401.721495]  [<ffffffff8120151d>]
sync_filesystems+0x30d/0x350
Apr 22 09:27:49 daisy kernel: [143401.721499]  [<ffffffff812016d8>]
sys_sync+0x148/0x1a0
Apr 22 09:27:49 daisy kernel: [143401.721503]  [<ffffffff81571424>]
system_call_fastpath+0x22/0x3a
Apr 22 09:29:49 daisy kernel: [143521.721059] INFO: task hdparm:22246
blocked for more than 120 seconds.
Apr 22 09:29:49 daisy kernel: [143521.721158]       Not tainted
2.6.32-042stab142.1 #1
Apr 22 09:29:49 daisy kernel: [143521.721245] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Apr 22 09:29:49 daisy kernel: [143521.721415] hdparm        D
ffff88000c778300     0 22246  20845    0 0x00000084
Apr 22 09:29:49 daisy kernel: [143521.721421]  ffff88006654bcc8
0000000000000086 ffff88006654bc58 ffffffff810098af
Apr 22 09:29:49 daisy kernel: [143521.721426]  ffff880028200000
000000001a42f238 ffff8800110101c0 ffff88011a42f200
Apr 22 09:29:49 daisy kernel: [143521.721431]  ffff88006654bc68
ffffffff8107bbfe ffff8800110101c0 0000000000000000
Apr 22 09:29:49 daisy kernel: [143521.721436] Call Trace:
Apr 22 09:29:49 daisy kernel: [143521.721445]  [<ffffffff810098af>] ?
__switch_to+0x16f/0x470
Apr 22 09:29:49 daisy kernel: [143521.721451]  [<ffffffff8107bbfe>] ?
finish_task_switch+0xce/0x120
Apr 22 09:29:49 daisy kernel: [143521.721455]  [<ffffffff8107c851>] ?
update_curr+0xe1/0x1f0
Apr 22 09:29:49 daisy kernel: [143521.721460]  [<ffffffff81566c55>]
schedule_timeout+0x215/0x2f0
Apr 22 09:29:49 daisy kernel: [143521.721465]  [<ffffffff815669b4>]
wait_for_completion+0xe4/0x120
Apr 22 09:29:49 daisy kernel: [143521.721469]  [<ffffffff81071ce0>] ?
default_wake_function+0x0/0x20
Apr 22 09:29:49 daisy kernel: [143521.721473]  [<ffffffff815694db>] ?
_spin_unlock_bh+0x1b/0x20
Apr 22 09:29:49 daisy kernel: [143521.721479]  [<ffffffff811f9773>]
writeback_inodes_sb_nr_ub+0x83/0xb0
Apr 22 09:29:49 daisy kernel: [143521.721483]  [<ffffffff811f9806>]
writeback_inodes_sb_ub+0x46/0x50
Apr 22 09:29:49 daisy kernel: [143521.721487]  [<ffffffff81200f38>]
__sync_filesystem+0x48/0xa0
Apr 22 09:29:49 daisy kernel: [143521.721491]  [<ffffffff8120151d>]
sync_filesystems+0x30d/0x350
Apr 22 09:29:49 daisy kernel: [143521.721495]  [<ffffffff812016d8>]
sys_sync+0x148/0x1a0
Apr 22 09:29:49 daisy kernel: [143521.721499]  [<ffffffff81571424>]
system_call_fastpath+0x22/0x3a
Apr 22 09:30:04 daisy ata_id[22489]: HDIO_GET_IDENTITY failed for '/dev/sdb'
------------------
I tried running hdparm -tT /dev/sda, but after waiting 5+ minutes for
any command output I cancelled it. 

I am rsyncing the data from this system over to another system now,
clearly something is wrong, but I can't tell what. 

The system is an older AMD Opteron 180 processor (dual core) 4 GB ram,
RAID controller with RAID 5 set up with 4x 4TB Western Digital Drives.

I rebooted the system day before yesterday, and that's when the timeout
messages started pouring into the log.   

when I run tw_cli /c8 show, all four drives say they are ok
[root@daisy cron.daily]# tw_cli /c8 show

Unit  UnitType  Status         %RCmpl  %V/I/M  Stripe  Size(GB)  Cache 
AVrfy
------------------------------------------------------------------------------
u0    RAID-5    OK             -       -       256K    11175.8   Ri     ON

VPort Status         Unit Size      Type  Phy Encl-Slot    Model
------------------------------------------------------------------------------
p0    OK             u0   3.63 TB   SATA  0   -            WDC
WD4005FZBX-00K5
p1    OK             u0   3.63 TB   SATA  1   -            WDC
WD4005FZBX-00K5
p2    OK             u0   3.63 TB   SATA  2   -            WDC
WD4005FZBX-00K5
p3    OK             u0   3.63 TB   SATA  3   -            WDC
WD4005FZBX-00K5

Logical Volumes appear active:
[root@daisy cron.daily]# lvscan
  ACTIVE            '/dev/vg_daisy/lv_root' [10.89 TiB] inherit
  ACTIVE            '/dev/vg_daisy/lv_swap' [3.88 GiB] inherit
  ACTIVE            '/dev/vg_daisy/lv_home' [20.00 GiB] inherit
[root@daisy cron.daily]#

[root@daisy cron.daily]# lvmdiskscan
  /dev/ram0             [      16.00 MiB]
  /dev/root             [      10.89 TiB]
  /dev/ram1             [      16.00 MiB]
  /dev/sda1             [       2.82 TiB]
  /dev/vg_daisy/lv_swap [       3.88 GiB]
  /dev/ram2             [      16.00 MiB]
  /dev/vg_daisy/lv_home [      20.00 GiB]
  /dev/ram3             [      16.00 MiB]
  /dev/sda3             [     842.87 GiB]
  /dev/ram4             [      16.00 MiB]
  /dev/ram5             [      16.00 MiB]
  /dev/ram6             [      16.00 MiB]
  /dev/ram7             [      16.00 MiB]
  /dev/ram8             [      16.00 MiB]
  /dev/ram9             [      16.00 MiB]
  /dev/ram10            [      16.00 MiB]
  /dev/ram11            [      16.00 MiB]
  /dev/ram12            [      16.00 MiB]
  /dev/ram13            [      16.00 MiB]
  /dev/ram14            [      16.00 MiB]
  /dev/ram15            [      16.00 MiB]
  /dev/sdb1             [       1.82 TiB] LVM physical volume
  /dev/sdc1             [     500.00 MiB]
  /dev/sdc2             [       4.00 TiB] LVM physical volume
  /dev/sdd1             [       4.00 TiB] LVM physical volume
  /dev/sde1             [       2.91 TiB] LVM physical volume
  3 disks
  19 partitions
  0 LVM physical volume whole disks
  4 LVM physical volumes
[root@daisy cron.daily]#

grub.conf:
[root@daisy grub]# cat grub.conf
# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE:  You have a /boot partition.  This means that
#          all kernel and initrd paths are relative to /boot/, eg.
#          root (hd0,0)
#          kernel /vmlinuz-version ro root=/dev/mapper/vg_daisy-lv_root
#          initrd /initrd-[generic-]version.img
#boot=/dev/sdb
default=0
timeout=5
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
title OpenVZ (2.6.32-042stab142.1)
        root (hd0,0)
        kernel /vmlinuz-2.6.32-042stab142.1 ro
root=/dev/mapper/vg_daisy-lv_root rd_NO_LUKS rd_LVM_LV=vg_daisy/lv_swap
LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto
rd_LVM_LV=vg_daisy/lv_root  KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet
        initrd /initramfs-2.6.32-042stab142.1.img
title OpenVZ (2.6.32-042stab141.3)
        root (hd0,0)
        kernel /vmlinuz-2.6.32-042stab141.3 ro
root=/dev/mapper/vg_daisy-lv_root rd_NO_LUKS rd_LVM_LV=vg_daisy/lv_swap
LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto
rd_LVM_LV=vg_daisy/lv_root  KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet
        initrd /initramfs-2.6.32-042stab141.3.img
title OpenVZ (2.6.32-042stab140.4)
        root (hd0,0)
        kernel /vmlinuz-2.6.32-042stab140.4 ro
root=/dev/mapper/vg_daisy-lv_root rd_NO_LUKS rd_LVM_LV=vg_daisy/lv_swap
LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto
rd_LVM_LV=vg_daisy/lv_root  KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet
        initrd /initramfs-2.6.32-042stab140.4.img
title OpenVZ (2.6.32-042stab140.1)
        root (hd0,0)
        kernel /vmlinuz-2.6.32-042stab140.1 ro
root=/dev/mapper/vg_daisy-lv_root rd_NO_LUKS rd_LVM_LV=vg_daisy/lv_swap
LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto
rd_LVM_LV=vg_daisy/lv_root  KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet
        initrd /initramfs-2.6.32-042stab140.1.img
title OpenVZ (2.6.32-042stab139.1)
        root (hd0,0)
        kernel /vmlinuz-2.6.32-042stab139.1 ro
root=/dev/mapper/vg_daisy-lv_root rd_NO_LUKS rd_LVM_LV=vg_daisy/lv_swap
LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto
rd_LVM_LV=vg_daisy/lv_root  KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet
        initrd /initramfs-2.6.32-042stab139.1.img
title CentOS 6 (2.6.32-754.el6.x86_64)
        root (hd0,0)
        kernel /vmlinuz-2.6.32-754.el6.x86_64 ro
root=/dev/mapper/vg_daisy-lv_root rd_NO_LUKS rd_LVM_LV=vg_daisy/lv_swap
LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto
rd_LVM_LV=vg_daisy/lv_root  KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet
        initrd /initramfs-2.6.32-754.el6.x86_64.img
-------------

Top is not showing anything out of the ordinary:
----------
[root@daisy grub]#

top - 09:41:57 up 1 day, 16:04,  3 users,  load average: 5.89, 5.83, 5.43
Tasks: 369 total,   1 running, 368 sleeping,   0 stopped,   0 zombie
Cpu(s):  0.2%us,  1.2%sy,  0.0%ni, 25.0%id, 73.5%wa,  0.0%hi,  0.2%si, 
0.0%st
Mem:   3894628k total,  3861280k used,    33348k free,    95608k buffers
Swap:  4063228k total,    34888k used,  4028340k free,  3139272k cached

    PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
   1266 root      20   0     0    0    0 D  1.0  0.0  12:27.75 flush-253:0
  21041 1153      20   0  3188 1840 1012 D  0.7  0.0   0:00.72 imap
  21599 97        20   0  5160 1940 1568 S  0.7  0.0   0:01.06 imap-login
  22636 root      20   0 15272 1524  964 R  0.7  0.0   0:00.06 top
   1977 root      20   0  2096  644  360 S  0.3  0.0   0:27.92 dovecot
  22528 97        20   0  5160 2044 1672 S  0.3  0.1   0:00.35 imap-login
  22578 1155      20   0  2904 1528  940 D  0.3  0.0   0:00.22 imap
      1 root      20   0 19236  268  136 S  0.0  0.0   0:00.68 init
      2 root      20   0     0    0    0 S  0.0  0.0   0:00.00 kthreadd
      3 root      RT   0     0    0    0 S  0.0  0.0   0:00.04 migration/0
      4 root      20   0     0    0    0 S  0.0  0.0   0:01.88 ksoftirqd/0
      5 root      RT   0     0    0    0 S  0.0  0.0   0:00.00 stopper/0
      6 root      RT   0     0    0    0 S  0.0  0.0   0:00.19 watchdog/0
      7 root      RT   0     0    0    0 S  0.0  0.0   0:00.07 migration/1
      8 root      RT   0     0    0    0 S  0.0  0.0   0:00.00 stopper/1
      9 root      20   0     0    0    0 S  0.0  0.0   0:03.17 ksoftirqd/1
     10 root      RT   0     0    0    0 S  0.0  0.0   0:00.20 watchdog/1
     11 root      20   0     0    0    0 S  0.0  0.0   0:07.23 events/0
     12 root      20   0     0    0    0 S  0.0  0.0   0:08.55 events/1
     13 root      20   0     0    0    0 S  0.0  0.0   0:00.00 events/0
     14 root      20   0     0    0    0 S  0.0  0.0   0:00.00 events/1
     15 root      20   0     0    0    0 S  0.0  0.0   0:00.00 events_long/0
     16 root      20   0     0    0    0 S  0.0  0.0   0:00.00 events_long/1
     17 root      20   0     0    0    0 S  0.0  0.0   0:00.00
events_power_ef
     18 root      20   0     0    0    0 S  0.0  0.0   0:00.00
events_power_ef
     19 root      20   0     0    0    0 S  0.0  0.0   0:00.00 cgroup
     20 root      20   0     0    0    0 S  0.0  0.0   0:00.00 khelper
     21 root      20   0     0    0    0 S  0.0  0.0   0:00.01 netns
     22 root      20   0     0    0    0 S  0.0  0.0   0:00.00 async/mgr
     23 root      20   0     0    0    0 S  0.0  0.0   0:00.00 pm
     24 root      20   0     0    0    0 S  0.0  0.0   0:00.29 sync_supers
------------
This is a company production mail server, and I can't find the solution,
I need help, as soon as someone is able, thank you!
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