我有一台带有 RAID 控制器的服务器，该控制器通过 SAS 连接到 JBOD。JBOD 装有 16 个 3TB 的 SAS-HDD（8 个同品牌，8 个其他品牌，转速相同）。我已配置 3 个逻辑驱动器，每个驱动器有 5 个物理 HDD（+1 个作为热备用）。
现在为了测试它，我运行以下脚本：
for i in 1 10 50 100 1000
do for j in a b c
do dd if=/dev/zero of=/dev/sd$j bs=1G count=$i
done
done
每次我运行此脚本时，它都能很好地运行 count=1,10 和 50。
但是对于 100G，虚拟驱动器上的写入会随机崩溃。这意味着，有时 /dev/sda 上的写入会完成且没有错误，但 /dev/sdb 会崩溃。有时 /dev/sda 和 /dev/sdb 上的写入会完成，但 /dev/sdc 上的写入会失败。
我怀疑我的 RAID 卡可能有故障，因为我已经通过将硬盘直接连接到服务器并在完整 3TB 上运行“dd”来单独测试了我的硬盘。
你们有什么建议？
编辑：
服务器主板品牌/型号: 超微 X8DTH-6F
RAID 控制器：带 BBU 的 LSI MegaRaid SAS 9285-8e
磁盘阵列: SuperMicro JBOD SC836E26-R1200B
SAS 硬盘：3.5 英寸，6Gbps SAS，3TB，7200rpm（8x - Seagate ST3000NM0023、8x - Hitachi Ultrastar 7K3000
操作系统：科学Linux 6.3
JBOD 通过 6Gbps SAS 电缆连接到 RAID 控制器。
编辑2：这是来自 /var/log/messages 的文本：
May 1 18:14:41 fileserver udevd[875]: worker [4083] unexpectedly returned with status 0x0100
May 1 18:14:41 fileserver udevd[875]: worker [4083] failed while handling '/devices/pci0000:00/0000:00:03.0/0000:08:00.0/host0/target0:2:0/0:2:0:0/block/sda'
May 1 18:14:43 fileserver kernel: megasas: Found FW in FAULT state, will reset adapter.
May 1 18:14:43 fileserver kernel: megaraid_sas: resetting fusion adapter.
May 1 18:15:17 fileserver kernel: INFO: task dd:4144 blocked for more than 120 seconds.
May 1 18:15:17 fileserver kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
May 1 18:15:17 fileserver kernel: dd D 000000000000000d 0 4144 4132 0x00000004
May 1 18:15:17 fileserver kernel: ffff88060c513bf8 0000000000000082 0000000000000000 ffffea0015a3a8c0
May 1 18:15:17 fileserver kernel: ffff88062d837938 ffff88062d837848 ffff88062ce06ea0 ffff88062ce06ea0
May 1 18:15:17 fileserver kernel: ffff8806133385f8 ffff88060c513fd8 000000000000fb88 ffff8806133385f8
May 1 18:15:17 fileserver kernel: Call Trace:
May 1 18:15:17 fileserver kernel: [<ffffffff811140c0>] ? sync_page+0x0/0x50
May 1 18:15:17 fileserver kernel: [<ffffffff814fdfc3>] io_schedule+0x73/0xc0
May 1 18:15:17 fileserver kernel: [<ffffffff811140fd>] sync_page+0x3d/0x50
May 1 18:15:17 fileserver kernel: [<ffffffff814fe97f>] __wait_on_bit+0x5f/0x90
May 1 18:15:17 fileserver kernel: [<ffffffff81114333>] wait_on_page_bit+0x73/0x80
May 1 18:15:17 fileserver kernel: [<ffffffff81092110>] ? wake_bit_function+0x0/0x50
May 1 18:15:17 fileserver kernel: [<ffffffff8112a835>] ? pagevec_lookup_tag+0x25/0x40
May 1 18:15:17 fileserver kernel: [<ffffffff811147ab>] wait_on_page_writeback_range+0xfb/0x190
May 1 18:15:17 fileserver kernel: [<ffffffff8111486f>] filemap_fdatawait+0x2f/0x40
May 1 18:15:17 fileserver kernel: [<ffffffff81114e94>] filemap_write_and_wait+0x44/0x60
May 1 18:15:17 fileserver kernel: [<ffffffff811b4634>] __sync_blockdev+0x24/0x50
May 1 18:15:17 fileserver kernel: [<ffffffff811b4673>] sync_blockdev+0x13/0x20
May 1 18:15:17 fileserver kernel: [<ffffffff811b47f8>] __blkdev_put+0x178/0x1b0
May 1 18:15:17 fileserver kernel: [<ffffffff811b9403>] ? fsnotify+0x113/0x160
May 1 18:15:17 fileserver kernel: [<ffffffff811b4840>] blkdev_put+0x10/0x20
May 1 18:15:17 fileserver kernel: [<ffffffff811b4883>] blkdev_close+0x33/0x60
May 1 18:15:17 fileserver kernel: [<ffffffff8117c935>] __fput+0xf5/0x210
May 1 18:15:17 fileserver kernel: [<ffffffff8117ca75>] fput+0x25/0x30
May 1 18:15:17 fileserver kernel: [<ffffffff8117849d>] filp_close+0x5d/0x90
May 1 18:15:17 fileserver kernel: [<ffffffff81178575>] sys_close+0xa5/0x100
May 1 18:15:17 fileserver kernel: [<ffffffff8100b0f2>] system_call_fastpath+0x16/0x1b
May 1 18:15:17 fileserver kernel: INFO: task scsi_id:4145 blocked for more than 120 seconds.
May 1 18:15:17 fileserver kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
May 1 18:15:17 fileserver kernel: scsi_id D 0000000000000013 0 4145 1 0x00000000
May 1 18:15:17 fileserver kernel: ffff880c1a145c18 0000000000000086 0000000000000000 ffff880c00000002
May 1 18:15:17 fileserver kernel: ffff880c1a145be8 00007f9200000066 00000000007fffff ffffffff81fc7990
May 1 18:15:17 fileserver kernel: ffff880c2ee3b098 ffff880c1a145fd8 000000000000fb88 ffff880c2ee3b098
May 1 18:15:17 fileserver kernel: Call Trace:
May 1 18:15:17 fileserver kernel: [<ffffffff814fee8e>] __mutex_lock_slowpath+0x13e/0x180
May 1 18:15:17 fileserver kernel: [<ffffffff8125ee50>] ? exact_match+0x0/0x10
May 1 18:15:17 fileserver kernel: [<ffffffff814fed2b>] mutex_lock+0x2b/0x50
May 1 18:15:17 fileserver kernel: [<ffffffff811b4958>] __blkdev_get+0x68/0x3c0
May 1 18:15:17 fileserver kernel: [<ffffffff811b4cd0>] ? blkdev_open+0x0/0xc0
May 1 18:15:17 fileserver kernel: [<ffffffff811b4cc0>] blkdev_get+0x10/0x20
May 1 18:15:17 fileserver kernel: [<ffffffff811b4d41>] blkdev_open+0x71/0xc0
May 1 18:15:17 fileserver kernel: [<ffffffff8117888a>] __dentry_open+0x10a/0x360
May 1 18:15:17 fileserver kernel: [<ffffffff8121c262>] ? selinux_inode_permission+0x72/0xb0
May 1 18:15:17 fileserver kernel: [<ffffffff8121429f>] ? security_inode_permission+0x1f/0x30
May 1 18:15:17 fileserver kernel: [<ffffffff81178bf4>] nameidata_to_filp+0x54/0x70
May 1 18:15:17 fileserver kernel: [<ffffffff8118c100>] do_filp_open+0x6c0/0xd60
May 1 18:15:17 fileserver kernel: [<ffffffff8104452c>] ? __do_page_fault+0x1ec/0x480
May 1 18:15:17 fileserver kernel: [<ffffffff812718b1>] ? cpumask_any_but+0x31/0x50
May 1 18:15:17 fileserver kernel: [<ffffffff811449a0>] ? unmap_region+0x110/0x130
May 1 18:15:17 fileserver kernel: [<ffffffff81198182>] ? alloc_fd+0x92/0x160
May 1 18:15:17 fileserver kernel: [<ffffffff81178639>] do_sys_open+0x69/0x140
May 1 18:15:17 fileserver kernel: [<ffffffff81178750>] sys_open+0x20/0x30
May 1 18:15:17 fileserver kernel: [<ffffffff8100b0f2>] system_call_fastpath+0x16/0x1b
May 1 18:15:17 fileserver kernel: INFO: task fdisk:4176 blocked for more than 120 seconds.
May 1 18:15:17 fileserver kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
May 1 18:15:17 fileserver kernel: fdisk D 0000000000000013 0 4176 4147 0x00000004
May 1 18:15:17 fileserver kernel: ffff880c2f56dc18 0000000000000082 0000000000000000 ffff880c30802078
May 1 18:15:17 fileserver kernel: ffff880c2f56dbe8 ffff880c00000721 00000000007fffff ffffffff81fc8368
May 1 18:15:17 fileserver kernel: ffff880c1d6af058 ffff880c2f56dfd8 000000000000fb88 ffff880c1d6af058
May 1 18:15:17 fileserver kernel: Call Trace:
May 1 18:15:17 fileserver kernel: [<ffffffff814fee8e>] __mutex_lock_slowpath+0x13e/0x180
May 1 18:15:17 fileserver kernel: [<ffffffff8125ee50>] ? exact_match+0x0/0x10
May 1 18:15:17 fileserver kernel: [<ffffffff814fed2b>] mutex_lock+0x2b/0x50
May 1 18:15:17 fileserver kernel: [<ffffffff811b4958>] __blkdev_get+0x68/0x3c0
May 1 18:15:17 fileserver kernel: [<ffffffff811b4cd0>] ? blkdev_open+0x0/0xc0
May 1 18:15:17 fileserver kernel: [<ffffffff811b4cc0>] blkdev_get+0x10/0x20
May 1 18:15:17 fileserver kernel: [<ffffffff811b4d41>] blkdev_open+0x71/0xc0
May 1 18:15:17 fileserver kernel: [<ffffffff8117888a>] __dentry_open+0x10a/0x360
May 1 18:15:17 fileserver kernel: [<ffffffff8121c262>] ? selinux_inode_permission+0x72/0xb0
May 1 18:15:17 fileserver kernel: [<ffffffff8121429f>] ? security_inode_permission+0x1f/0x30
May 1 18:15:17 fileserver kernel: [<ffffffff81178bf4>] nameidata_to_filp+0x54/0x70
May 1 18:15:17 fileserver kernel: [<ffffffff8118c100>] do_filp_open+0x6c0/0xd60
May 1 18:15:17 fileserver kernel: [<ffffffff8104452c>] ? __do_page_fault+0x1ec/0x480
May 1 18:15:17 fileserver kernel: [<ffffffff811e06c5>] ? pde_users_dec+0x25/0x60
May 1 18:15:17 fileserver kernel: [<ffffffff81198182>] ? alloc_fd+0x92/0x160
May 1 18:15:17 fileserver kernel: [<ffffffff81178639>] do_sys_open+0x69/0x140
May 1 18:15:17 fileserver kernel: [<ffffffff81178750>] sys_open+0x20/0x30
May 1 18:15:17 fileserver kernel: [<ffffffff8100b0f2>] system_call_fastpath+0x16/0x1b
May 1 18:16:27 fileserver kernel: megaraid_sas: Diag reset adapter never cleared!
May 1 18:17:17 fileserver kernel: INFO: task dd:4144 blocked for more than 120 seconds.
May 1 18:17:17 fileserver kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
May 1 18:17:17 fileserver kernel: dd D 000000000000000d 0 4144 4132 0x00000004
May 1 18:17:17 fileserver kernel: ffff88060c513bf8 0000000000000082 0000000000000000 ffffea0015a3a8c0
May 1 18:17:17 fileserver kernel: ffff88062d837938 ffff88062d837848 ffff88062ce06ea0 ffff88062ce06ea0
May 1 18:17:17 fileserver kernel: ffff8806133385f8 ffff88060c513fd8 000000000000fb88 ffff8806133385f8
May 1 18:17:17 fileserver kernel: Call Trace:
May 1 18:17:17 fileserver kernel: [<ffffffff811140c0>] ? sync_page+0x0/0x50
May 1 18:17:17 fileserver kernel: [<ffffffff814fdfc3>] io_schedule+0x73/0xc0
May 1 18:17:17 fileserver kernel: [<ffffffff811140fd>] sync_page+0x3d/0x50
May 1 18:17:17 fileserver kernel: [<ffffffff814fe97f>] __wait_on_bit+0x5f/0x90
May 1 18:17:17 fileserver kernel: [<ffffffff81114333>] wait_on_page_bit+0x73/0x80
May 1 18:17:17 fileserver kernel: [<ffffffff81092110>] ? wake_bit_function+0x0/0x50
May 1 18:17:17 fileserver kernel: [<ffffffff8112a835>] ? pagevec_lookup_tag+0x25/0x40
May 1 18:17:17 fileserver kernel: [<ffffffff811147ab>] wait_on_page_writeback_range+0xfb/0x190
May 1 18:17:17 fileserver kernel: [<ffffffff8111486f>] filemap_fdatawait+0x2f/0x40
May 1 18:17:17 fileserver kernel: [<ffffffff81114e94>] filemap_write_and_wait+0x44/0x60
May 1 18:17:17 fileserver kernel: [<ffffffff811b4634>] __sync_blockdev+0x24/0x50
May 1 18:17:17 fileserver kernel: [<ffffffff811b4673>] sync_blockdev+0x13/0x20
May 1 18:17:17 fileserver kernel: [<ffffffff811b47f8>] __blkdev_put+0x178/0x1b0
May 1 18:17:17 fileserver kernel: [<ffffffff811b9403>] ? fsnotify+0x113/0x160
May 1 18:17:17 fileserver kernel: [<ffffffff811b4840>] blkdev_put+0x10/0x20
May 1 18:17:17 fileserver kernel: [<ffffffff811b4883>] blkdev_close+0x33/0x60
May 1 18:17:17 fileserver kernel: [<ffffffff8117c935>] __fput+0xf5/0x210
May 1 18:17:17 fileserver kernel: [<ffffffff8117ca75>] fput+0x25/0x30
May 1 18:17:17 fileserver kernel: [<ffffffff8117849d>] filp_close+0x5d/0x90
May 1 18:17:17 fileserver kernel: [<ffffffff81178575>] sys_close+0xa5/0x100
May 1 18:17:17 fileserver kernel: [<ffffffff8100b0f2>] system_call_fastpath+0x16/0x1b
May 1 18:17:17 fileserver kernel: INFO: task scsi_id:4145 blocked for more than 120 seconds.
May 1 18:17:17 fileserver kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
May 1 18:17:17 fileserver kernel: scsi_id D 0000000000000013 0 4145 1 0x00000000
May 1 18:17:17 fileserver kernel: ffff880c1a145c18 0000000000000086 0000000000000000 ffff880c00000002
May 1 18:17:17 fileserver kernel: ffff880c1a145be8 00007f9200000066 00000000007fffff ffffffff81fc7990
May 1 18:17:17 fileserver kernel: ffff880c2ee3b098 ffff880c1a145fd8 000000000000fb88 ffff880c2ee3b098
May 1 18:17:17 fileserver kernel: Call Trace:
May 1 18:17:17 fileserver kernel: [<ffffffff814fee8e>] __mutex_lock_slowpath+0x13e/0x180
May 1 18:17:17 fileserver kernel: [<ffffffff8125ee50>] ? exact_match+0x0/0x10
May 1 18:17:17 fileserver kernel: [<ffffffff814fed2b>] mutex_lock+0x2b/0x50
May 1 18:17:17 fileserver kernel: [<ffffffff811b4958>] __blkdev_get+0x68/0x3c0
May 1 18:17:17 fileserver kernel: [<ffffffff811b4cd0>] ? blkdev_open+0x0/0xc0
May 1 18:17:17 fileserver kernel: [<ffffffff811b4cc0>] blkdev_get+0x10/0x20
May 1 18:17:17 fileserver kernel: [<ffffffff811b4d41>] blkdev_open+0x71/0xc0
May 1 18:17:17 fileserver kernel: [<ffffffff8117888a>] __dentry_open+0x10a/0x360
May 1 18:17:17 fileserver kernel: [<ffffffff8121c262>] ? selinux_inode_permission+0x72/0xb0
May 1 18:17:17 fileserver kernel: [<ffffffff8121429f>] ? security_inode_permission+0x1f/0x30
May 1 18:17:17 fileserver kernel: [<ffffffff81178bf4>] nameidata_to_filp+0x54/0x70
May 1 18:17:17 fileserver kernel: [<ffffffff8118c100>] do_filp_open+0x6c0/0xd60
May 1 18:17:17 fileserver kernel: [<ffffffff8104452c>] ? __do_page_fault+0x1ec/0x480
May 1 18:17:17 fileserver kernel: [<ffffffff812718b1>] ? cpumask_any_but+0x31/0x50
May 1 18:17:17 fileserver kernel: [<ffffffff811449a0>] ? unmap_region+0x110/0x130
May 1 18:17:17 fileserver kernel: [<ffffffff81198182>] ? alloc_fd+0x92/0x160
May 1 18:17:17 fileserver kernel: [<ffffffff81178639>] do_sys_open+0x69/0x140
May 1 18:17:17 fileserver kernel: [<ffffffff81178750>] sys_open+0x20/0x30
May 1 18:17:17 fileserver kernel: [<ffffffff8100b0f2>] system_call_fastpath+0x16/0x1b
May 1 18:17:17 fileserver kernel: INFO: task fdisk:4176 blocked for more than 120 seconds.
May 1 18:17:17 fileserver kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
May 1 18:17:17 fileserver kernel: fdisk D 0000000000000013 0 4176 4147 0x00000004
May 1 18:17:17 fileserver kernel: ffff880c2f56dc18 0000000000000082 0000000000000000 ffff880c30802078
May 1 18:17:17 fileserver kernel: ffff880c2f56dbe8 ffff880c00000721 00000000007fffff ffffffff81fc8368
May 1 18:17:17 fileserver kernel: ffff880c1d6af058 ffff880c2f56dfd8 000000000000fb88 ffff880c1d6af058
May 1 18:17:17 fileserver kernel: Call Trace:
May 1 18:17:17 fileserver kernel: [<ffffffff814fee8e>] __mutex_lock_slowpath+0x13e/0x180
May 1 18:17:17 fileserver kernel: [<ffffffff8125ee50>] ? exact_match+0x0/0x10
May 1 18:17:17 fileserver kernel: [<ffffffff814fed2b>] mutex_lock+0x2b/0x50
May 1 18:17:17 fileserver kernel: [<ffffffff811b4958>] __blkdev_get+0x68/0x3c0
May 1 18:17:17 fileserver kernel: [<ffffffff811b4cd0>] ? blkdev_open+0x0/0xc0
May 1 18:17:17 fileserver kernel: [<ffffffff811b4cc0>] blkdev_get+0x10/0x20
May 1 18:17:17 fileserver kernel: [<ffffffff811b4d41>] blkdev_open+0x71/0xc0
May 1 18:17:17 fileserver kernel: [<ffffffff8117888a>] __dentry_open+0x10a/0x360
May 1 18:17:17 fileserver kernel: [<ffffffff8121c262>] ? selinux_inode_permission+0x72/0xb0
May 1 18:17:17 fileserver kernel: [<ffffffff8121429f>] ? security_inode_permission+0x1f/0x30
May 1 18:17:17 fileserver kernel: [<ffffffff81178bf4>] nameidata_to_filp+0x54/0x70
May 1 18:17:17 fileserver kernel: [<ffffffff8118c100>] do_filp_open+0x6c0/0xd60
May 1 18:17:17 fileserver kernel: [<ffffffff8104452c>] ? __do_page_fault+0x1ec/0x480
May 1 18:17:17 fileserver kernel: [<ffffffff811e06c5>] ? pde_users_dec+0x25/0x60
May 1 18:17:17 fileserver kernel: [<ffffffff81198182>] ? alloc_fd+0x92/0x160
May 1 18:17:17 fileserver kernel: [<ffffffff81178639>] do_sys_open+0x69/0x140
May 1 18:17:17 fileserver kernel: [<ffffffff81178750>] sys_open+0x20/0x30
May 1 18:17:17 fileserver kernel: [<ffffffff8100b0f2>] system_call_fastpath+0x16/0x1b
May 1 18:18:11 fileserver kernel: megaraid_sas: Diag reset adapter never cleared!
...
...
我什么也不明白，这是求救的呼喊！
答案1
原来 Supermicro 服务器上的 Scientific Linux 6.3 在 PCIe 上有些问题，有朋友建议在 grub 中添加以下两个选项：
- pcie_aspm=关闭
- 禁用_msi=1
使用这些选项启动后，一切都开始正常工作。
有什么想法吗？