[CentOS] ATA: abnormal status 0x7F on port 0xB887

Hello,

We have recently purchased two Supermicro servers, AS-1021M-T2RB
(http://www.supermicro.com/Aplus/system/1U/1021/AS-1021M-T2RV.cfm), and
have built them both with CentOS 5 operating system. They are identical,
apart from the manufacturer of the disk drives.

Kernel is: Linux version 2.6.18-8.1.6.el5
(mockbuild at builder6.centos.org) (gcc version 4.1.1 20070105 (Red Hat
4.1.1-52)) #1 SMP Thu Jun 14 17:29:04 EDT 2007

Both servers have 2 SATA disks, and using software RAID 1.

When they boot, we see this error in dmesg:
 ATA: abnormal status 0x7F on port 0xB887

The servers seem to be working OK, but we're a little worried. The full
dmsg is below. Is anyone able to help explain what this problem/message
could be?

Thank you.

pcie_portdrv_probe->Dev[0375:10de] has invalid IRQ. Check vendor BIOS
assign_interrupt_mode Found MSI capability
Allocate Port Service[0000:00:0e.0:pcie00]
PCI: Setting latency timer of device 0000:00:0f.0 to 64
pcie_portdrv_probe->Dev[0377:10de] has invalid IRQ. Check vendor BIOS
assign_interrupt_mode Found MSI capability
Allocate Port Service[0000:00:0f.0:pcie00]
pci_hotplug: PCI Hot Plug PCI Core version: 0.5
Real Time Clock Driver v1.12ac
Non-volatile memory driver v1.2
Linux agpgart interface v0.101 (c) Dave Jones
Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing enabled
serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
serial8250: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
00:05: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
00:06: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
RAMDISK driver initialized: 16 RAM disks of 16384K size 4096 blocksize
Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 33MHz system bus speed for PIO modes; override with
idebus=xx
NFORCE-MCP55: IDE controller at PCI slot 0000:00:04.0
NFORCE-MCP55: chipset revision 161
NFORCE-MCP55: not 100% native mode: will probe irqs later
NFORCE-MCP55: 0000:00:04.0 (rev a1) UDMA133 controller
    ide0: BM-DMA at 0xffa0-0xffa7, BIOS settings: hda:pio, hdb:DMA
Probing IDE interface ide0...
hdb: MATSHITADVD-ROM SR-8178, ATAPI CD/DVD-ROM drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
Probing IDE interface ide1...
ide-floppy driver 0.99.newide
usbcore: registered new driver hiddev
usbcore: registered new driver usbhid
drivers/usb/input/hid-core.c: v2.6:USB HID core driver
PNP: PS/2 Controller [PNP0303:PS2K,PNP0f03:PS2M] at 0x60,0x64 irq 1,12
serio: i8042 AUX port at 0x60,0x64 irq 12
serio: i8042 KBD port at 0x60,0x64 irq 1
mice: PS/2 mouse device common for all mice
md: md driver 0.90.3 MAX_MD_DEVS=256, MD_SB_DISKS=27
md: bitmap version 4.39
TCP bic registered
Initializing IPsec netlink socket
NET: Registered protocol family 1
NET: Registered protocol family 17
powernow-k8: Found 4 Dual-Core AMD Opteron(tm) Processor 2212 processors
(version 2.10.00)
powernow-k8: MP systems not supported by PSB BIOS structure
powernow-k8: MP systems not supported by PSB BIOS structure
powernow-k8: MP systems not supported by PSB BIOS structure
powernow-k8: MP systems not supported by PSB BIOS structure
ACPI: (supports S0 S1 S4 S5)
Freeing unused kernel memory: 196k freed
Write protecting the kernel read-only data: 460k
input: AT Translated Set 2 keyboard as /class/input/input0
USB Universal Host Controller Interface driver v3.0
ohci_hcd: 2005 April 22 USB 1.1 'Open' Host Controller (OHCI) Driver
(PCI)
ACPI: PCI Interrupt Link [LUB0] enabled at IRQ 23
GSI 16 sharing vector 0xE9 and IRQ 16
ACPI: PCI Interrupt 0000:00:02.0[A] -> Link [LUB0] -> GSI 23 (level,
low)
-> IRQ 233
PCI: Setting latency timer of device 0000:00:02.0 to 64
ohci_hcd 0000:00:02.0: OHCI Host Controller
ohci_hcd 0000:00:02.0: new USB bus registered, assigned bus number 1
ohci_hcd 0000:00:02.0: irq 233, io mem 0xfe9bf000
usb usb1: configuration #1 chosen from 1 choice
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 10 ports detected
ACPI: PCI Interrupt Link [LUB2] enabled at IRQ 22
GSI 17 sharing vector 0x32 and IRQ 17
ACPI: PCI Interrupt 0000:00:02.1[B] -> Link [LUB2] -> GSI 22 (level,
low)
-> IRQ 50
PCI: Setting latency timer of device 0000:00:02.1 to 64
ehci_hcd 0000:00:02.1: EHCI Host Controller
ehci_hcd 0000:00:02.1: new USB bus registered, assigned bus number 2
ehci_hcd 0000:00:02.1: debug port 1
PCI: cache line size of 64 is not supported by device 0000:00:02.1
ehci_hcd 0000:00:02.1: irq 50, io mem 0xfe9bec00
ehci_hcd 0000:00:02.1: USB 2.0 started, EHCI 1.00, driver 10 Dec 2004
usb usb2: configuration #1 chosen from 1 choice
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 10 ports detected
md: raid1 personality registered for level 1
SCSI subsystem initialized
libata version 2.00 loaded.
sata_nv 0000:00:05.0: version 2.0
ACPI: PCI Interrupt Link [LSA0] enabled at IRQ 21
GSI 18 sharing vector 0x3A and IRQ 18
ACPI: PCI Interrupt 0000:00:05.0[A] -> Link [LSA0] -> GSI 21 (level,
low)
-> IRQ 58
PCI: Setting latency timer of device 0000:00:05.0 to 64
ata1: SATA max UDMA/133 cmd 0xC480 ctl 0xC402 bmdma 0xBC00 irq 58
ata2: SATA max UDMA/133 cmd 0xC080 ctl 0xC002 bmdma 0xBC08 irq 58
scsi0 : sata_nv
input: ImExPS/2 Generic Explorer Mouse as /class/input/input1
ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
ata1.00: ATA-7, max UDMA/133, 781422768 sectors: LBA48 NCQ (depth 0/32)
ata1.00: ata1: dev 0 multi count 16
ata1.00: configured for UDMA/133
scsi1 : sata_nv
ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
ata2.00: ATA-7, max UDMA/133, 781422768 sectors: LBA48 NCQ (depth 0/32)
ata2.00: ata2: dev 0 multi count 16
ata2.00: configured for UDMA/133
  Vendor: ATA       Model: WDC WD4000YR-01P  Rev: 01.0
  Type:   Direct-Access                      ANSI SCSI revision: 05
SCSI device sda: 781422768 512-byte hdwr sectors (400088 MB)
sda: Write Protect is off
sda: Mode Sense: 00 3a 00 00
SCSI device sda: drive cache: write back
SCSI device sda: 781422768 512-byte hdwr sectors (400088 MB)
sda: Write Protect is off
sda: Mode Sense: 00 3a 00 00
SCSI device sda: drive cache: write back
 sda: sda1 sda2
sd 0:0:0:0: Attached scsi disk sda
  Vendor: ATA       Model: WDC WD4000YR-01P  Rev: 01.0
  Type:   Direct-Access                      ANSI SCSI revision: 05
SCSI device sdb: 781422768 512-byte hdwr sectors (400088 MB)
sdb: Write Protect is off
sdb: Mode Sense: 00 3a 00 00
SCSI device sdb: drive cache: write back
SCSI device sdb: 781422768 512-byte hdwr sectors (400088 MB)
sdb: Write Protect is off
sdb: Mode Sense: 00 3a 00 00
SCSI device sdb: drive cache: write back
 sdb: sdb1 sdb2
sd 1:0:0:0: Attached scsi disk sdb
ACPI: PCI Interrupt Link [LSA1] enabled at IRQ 20
GSI 19 sharing vector 0x42 and IRQ 19
ACPI: PCI Interrupt 0000:00:05.1[B] -> Link [LSA1] -> GSI 20 (level,
low)
-> IRQ 66
PCI: Setting latency timer of device 0000:00:05.1 to 64
ata3: SATA max UDMA/133 cmd 0xB880 ctl 0xB802 bmdma 0xB080 irq 66
ata4: SATA max UDMA/133 cmd 0xB480 ctl 0xB402 bmdma 0xB088 irq 66
scsi2 : sata_nv
ata3: SATA link down (SStatus 0 SControl 300)
ATA: abnormal status 0x7F on port 0xB887
scsi3 : sata_nv
ata4: SATA link down (SStatus 0 SControl 300)
ATA: abnormal status 0x7F on port 0xB487
ACPI: PCI Interrupt Link [LSA2] enabled at IRQ 23
ACPI: PCI Interrupt 0000:00:05.2[C] -> Link [LSA2] -> GSI 23 (level,
low)
-> IRQ 233
PCI: Setting latency timer of device 0000:00:05.2 to 64
ata5: SATA max UDMA/133 cmd 0xB000 ctl 0xAC02 bmdma 0xA480 irq 233
ata6: SATA max UDMA/133 cmd 0xA880 ctl 0xA802 bmdma 0xA488 irq 233
scsi4 : sata_nv
ata5: SATA link down (SStatus 0 SControl 300)
ATA: abnormal status 0x7F on port 0xB007
scsi5 : sata_nv
ata6: SATA link down (SStatus 0 SControl 300)
ATA: abnormal status 0x7F on port 0xA887
md: Autodetecting RAID arrays.
md: autorun ...
md: considering sdb1 ...
md:  adding sdb1 ...
md:  adding sda1 ...
md: created md0
md: bind<sda1>
md: bind<sdb1>
md: running: <sdb1><sda1>
raid1: raid set md0 active with 2 out of 2 mirrors
md: ... autorun DONE.
kjournald starting.  Commit interval 5 seconds
EXT3-fs: mounted filesystem with ordered data mode.
SELinux:  Disabled at runtime.
SELinux:  Unregistering netfilter hooks
audit(1183559928.450:2): selinux=0 auid=4294967295
i2c_adapter i2c-0: nForce2 SMBus adapter at 0x2d00
i2c_adapter i2c-1: nForce2 SMBus adapter at 0x2e00
shpchp: Standard Hot Plug PCI Controller Driver version: 0.4
EDAC MC: Ver: 2.0.1 Jun 14 2007
EDAC MC0: Giving out device to k8_edac Athlon64/Opteron: DEV
0000:00:18.2
EDAC MC1: Giving out device to k8_edac Athlon64/Opteron: DEV
0000:00:19.2
sd 0:0:0:0: Attached scsi generic sg0 type 0
sd 1:0:0:0: Attached scsi generic sg1 type 0
Modular ISDN Stack core version (1_1_5) revision ($Revision: 1.40 $)
mISDNd: kernel daemon started (current:ffff81003e565820)
input: PC Speaker as /class/input/input2
mISDNd: test event done
hdb: ATAPI 24X DVD-ROM drive, 256kB Cache, UDMA(33)
Uniform CD-ROM driver Revision: 3.20
forcedeth.c: Reverse Engineered nForce ethernet driver. Version 0.56.
ACPI: PCI Interrupt Link [LMAC] enabled at IRQ 22
ACPI: PCI Interrupt 0000:00:08.0[A] -> Link [LMAC] -> GSI 22 (level,
low)
-> IRQ 50
PCI: Setting latency timer of device 0000:00:08.0 to 64
forcedeth: using HIGHDMA
Floppy drive(s): fd0 is 1.44M
FDC 0 is a post-1991 82077
eth0: forcedeth.c: subsystem: 015d9:1511 bound to 0000:00:08.0
ACPI: PCI Interrupt Link [LMAD] enabled at IRQ 21
ACPI: PCI Interrupt 0000:00:09.0[A] -> Link [LMAD] -> GSI 21 (level,
low)
-> IRQ 58
PCI: Setting latency timer of device 0000:00:09.0 to 64
forcedeth: using HIGHDMA
eth1: forcedeth.c: subsystem: 015d9:1511 bound to 0000:00:09.0
lp: driver loaded but no devices found
ACPI: Power Button (FF) [PWRF]
ACPI: Power Button (CM) [PWRB]
ibm_acpi: ec object not found
md: Autodetecting RAID arrays.
md: autorun ...
md: ... autorun DONE.
device-mapper: ioctl: 4.11.0-ioctl (2006-09-14) initialised:
dm-devel at redhat.com
EXT3 FS on md0, internal journal
Adding 4096564k swap on /dev/sdb2.  Priority:-1 extents:1
across:4096564k
Adding 4096564k swap on /dev/sda2.  Priority:-2 extents:1
across:4096564k
Zapata Telephony Interface Registered on major 196
Zaptel Version: 1.2.18
Zaptel Echo Canceller: KB1
Registered Tormenta2 PCI
Registered tone zone 4 (United Kingdom)
Registered tone zone 4 (United Kingdom)
Registered tone zone 4 (United Kingdom)
Registered tone zone 4 (United Kingdom)
Registered tone zone 4 (United Kingdom)
Registered tone zone 4 (United Kingdom)
Registered tone zone 4 (United Kingdom)
usbcore: registered new driver wcusb
Wildcard USB FXS Interface driver registered
Registered tone zone 4 (United Kingdom)
Registered tone zone 4 (United Kingdom)
CAPI Subsystem Rev 1.1.2.8
capifs: Rev 1.1.2.3
capi20: Rev 1.1.2.7: started up with major 68 (middleware+capifs)
ISDN L1 driver version 1.20
ISDN L2 driver version 1.32
mISDN: DSS1 Rev. 1.47
mISDN Capi 2.0 driver file version 1.21
mISDN: HFC-multi driver Rev. 1.68
HFC-multi: card manufacturer: 'Cologne Chip AG' card name: 'HFC-4S
Digium
Card' clock: normal
ACPI: PCI Interrupt Link [LNEA] enabled at IRQ 19
GSI 20 sharing vector 0x62 and IRQ 20
ACPI: PCI Interrupt 0000:03:06.0[A] -> Link [LNEA] -> GSI 19 (level,
low)
-> IRQ 98
HFC-4S#1: defined at IOBASE 0xec00 IRQ 98 HZ 1000 leds-type 2
HFC_multi: resetting HFC with chip ID=0xc revision=1
Setting GPIOs
calling vpm_init
VPM: Chip 0: ver 33
VPM: A-law mode
VPM reg 0x20 is 11
NLP Thresh is set to 2 (0x2)
VPM: A-law mode
VPM reg 0x20 is 11
NLP Thresh is set to 2 (0x2)
rtc: lost some interrupts at 1024Hz.
hfcpci_probe: DIPs(0x90) jumpers(0x0)
1 devices registered
mISDN_dsp: Audio DSP  Rev. 1.29 (debug=0x0) EchoCancellor MG2
dtmfthreshold(100)
mISDN_dsp: DSP clocks every 64 samples. This equals 8 jiffies.
NET: Registered protocol family 10
lo: Disabled Privacy Extensions
IPv6 over IPv4 tunneling driver
Zaptel Transcoder support loaded
eth0: no IPv6 routers present

-- 
Andrew Hearn