RAID controller is hanging and Linux RAID 5 is configured over the JBOD drives attached to the controller.

Issue

• RAID controller is hanging and Linux RAID 5 is configured over the JBOD drives attached to the controller.

[server1]
[ 7376.965489] perf: interrupt took too long (4975 > 4971), lowering kernel.perf_event_max_sample_rate to 40000
[14004.483654] perf: interrupt took too long (6219 > 6218), lowering kernel.perf_event_max_sample_rate to 32000
[22956.522915] sd 0:0:30:0: Power-on or device reset occurred
[22957.018691] sd 0:0:30:0: Power-on or device reset occurred
[28081.820312] INFO: task md2_raid5:1424 blocked for more than 120 seconds.
[28081.820342] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[28081.820365] md2_raid5       D ffff8f2fbcf9c1c0     0  1424      2 0x00000000
[28081.820369] Call Trace:
[28081.820376]  [<ffffffffa9785da9>] schedule+0x29/0x70
[28081.820380]  [<ffffffffa95aa98d>] md_super_wait+0x6d/0xd0
[28081.820385]  [<ffffffffa90c7780>] ? wake_up_atomic_t+0x30/0x30
[28081.820387]  [<ffffffffa95b11d1>] bitmap_wait_writes+0xc1/0xd0
[28081.820389]  [<ffffffffa95b28ec>] bitmap_unplug+0xec/0x120
[28081.820406]  [<ffffffffc0a7f640>] raid5d+0x150/0x670 [raid456]
[28081.820408]  [<ffffffffa95a33fd>] md_thread+0x16d/0x1e0
[28081.820410]  [<ffffffffa90c7780>] ? wake_up_atomic_t+0x30/0x30
[28081.820412]  [<ffffffffa95a3290>] ? find_pers+0x80/0x80
[28081.820414]  [<ffffffffa90c6691>] kthread+0xd1/0xe0
[28081.820416]  [<ffffffffa90c65c0>] ? insert_kthread_work+0x40/0x40
[28081.820421]  [<ffffffffa9792d37>] ret_from_fork_nospec_begin+0x21/0x21
[28081.820423]  [<ffffffffa90c65c0>] ? insert_kthread_work+0x40/0x40
[28081.820550] INFO: task splunkd:14132 blocked for more than 120 seconds.
[28081.820571] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this messa

[server2]
Aug 29 22:35:14 hostname kernel: INFO: task md2_raid5:1424 blocked for more than 120 seconds.
Aug 29 22:35:14 hostname kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Aug 29 22:35:14 hostname kernel: md2_raid5       D ffff9703f7c220e0     0  1424      2 0x00000000
Aug 29 22:35:14 hostname kernel: Call Trace:
Aug 29 22:35:14 hostname kernel: [<ffffffff87385da9>] schedule+0x29/0x70
Aug 29 22:35:14 hostname kernel: [<ffffffff871aa94d>] md_super_wait+0x6d/0xd0
Aug 29 22:35:14 hostname kernel: [<ffffffff86cc7780>] ? wake_up_atomic_t+0x30/0x30
Aug 29 22:35:14 hostname kernel: [<ffffffff871b1191>] bitmap_wait_writes+0xc1/0xd0