Re: sata_mv WARNING: at drivers/ata/libata-sff.c:1322

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I put the warning because a new pio task should not be queued while
another one is pending. Therefore, either sff_pio_task_link is NULL
[no task pending] or sff_pio_task_link is equal to the link of the
task [assumed to be the task in progress].
I must have missed something and did not cleanup sff_pio_task_link
properly in case of error...

Gwendal.

On Tue, Jul 12, 2011 at 7:29 AM, Tejun Heo <tj@xxxxxxxxxx> wrote:
> Hello,
>
> (cc'ing Gwendal Grignou and quoting whole message for him.)
>
> That warning wasn't added by me.  It's from ea3c64506ea79 "libata-sff:
> Reenable Port Multiplier after libata-sff remodeling."  Hmmm... I
> never expected SFF to be used in combination with PMP.  Anyways,
> Gwendal, any ideas?
>
> On Wed, Jun 29, 2011 at 12:03:19PM -0400, Mark Lord wrote:
>> On 11-06-29 11:07 AM, Marc MERLIN wrote:
>> > On Tue, Jun 28, 2011 at 10:03:41PM -0700, Marc MERLIN wrote:
>> >> On Tue, Jun 28, 2011 at 11:53:37PM -0400, Mark Lord wrote:
>> >>> On 11-06-28 11:41 PM, Marc MERLIN wrote:
>> >>> ..
>> >>>> So it seems it was a false alarm after all, I'll report back if I have
>> >>>> problems again, but it looks like it's working solidly and for what it's
>> >>>> worth with 5 drives and software raid 5, I can both read and write files
>> >>>> at about 115MB/s, which isn't too shabby :)
>> >>>
>> >>> Mmm.. power everything OFF, wait a few seconds,
>> >>> then power on and verify that it all still works.
>> >>
>> >> Yep, it does (even powered off the power supply to the MB that isn't truly
>> >> off otherwise).
>> >
>> > Mmh, although the card works fine now, I did notice 3 libata-sff errors
>> > in my boot log.
>> > Once boot is finished, there are no more errors.
>> >
>> > The card is:
>> > 02:00.0 SCSI storage controller: Marvell Technology Group Ltd. 88SX7042 PCI-e 4-port SATA-II (rev 02)
>> >
>> >>From the errors, should I try swapping the card considering it otherwise
>> > works fine after boot, or is the problem elsewhere?
>> > Can the 3 warnings just be ignored, or are they important?
>> >
>> > So I suppose this is also why my kernel gets tainted?
>> > kernel: Pid: 1636, comm: scsi_eh_9 Tainted: G        W   2.6.39.1-core2-volpreempt-noide-hm64-20110620 #2
>> >
>> > kernel: sata_mv 0000:02:00.0: version 1.28
>> > kernel: sata_mv 0000:02:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
>> > kernel: sata_mv 0000:02:00.0: Gen-IIE 32 slots 4 ports SCSI mode IRQ via INTx
>> > kernel: sata_mv 0000:02:00.0: setting latency timer to 64
>> > kernel: scsi8 : sata_mv
>> > kernel: scsi9 : sata_mv
>> > kernel: scsi10 : sata_mv
>> > kernel: scsi11 : sata_mv
>> > kernel: ata9: SATA max UDMA/133 mmio m1048576@0xfb800000 port 0xfb822000 irq 16
>> > kernel: ata10: SATA max UDMA/133 mmio m1048576@0xfb800000 port 0xfb824000 irq 16
>> > kernel: ata11: SATA max UDMA/133 mmio m1048576@0xfb800000 port 0xfb826000 irq 16
>> > kernel: ata12: SATA max UDMA/133 mmio m1048576@0xfb800000 port 0xfb828000 irq 16
>> > kernel: ata9: SATA link down (SStatus 0 SControl 300)
>> > kernel: ata10: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
>> > kernel: ata10.15: Port Multiplier 1.1, 0x1095:0x3726 r23, 6 ports, feat 0x1/0x9
>> > kernel: ata10.00: hard resetting link
>> > kernel: ata10.01: hard resetting link
>> > kernel: ata10.01: link resume succeeded after 1 retries
>> > kernel: ata10.02: hard resetting link
>> > kernel: ata10.02: link resume succeeded after 1 retries
>> > kernel: ata10.03: hard resetting link
>> > kernel: ata10.03: link resume succeeded after 1 retries
>> > kernel: ata10.04: hard resetting link
>> > kernel: ata10.05: hard resetting link
>> > kernel: ata10.00: ATA-7: ST3500630AS, 3.AAK, max UDMA/133
>> > kernel: ata10.00: 976773168 sectors, multi 0: LBA48 NCQ (depth 31/32)
>> > kernel: ata10.00: configured for UDMA/133
>> > kernel: ata10.01: qc timeout (cmd 0x27)
>> > kernel: ata10.01: failed to read native max address (err_mask=0x4)
>> > kernel: ata10.01: HPA support seems broken, skipping HPA handling
>> > kernel: ata10.15: hard resetting link
>> > kernel: ata10.15: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
>> > kernel: ------------[ cut here ]------------
>> > kernel: WARNING: at drivers/ata/libata-sff.c:1322 ata_sff_queue_pio_task+0x26/0x44()
>> > kernel: Hardware name: System Product Name
>> > kernel: Modules linked in: keyspan ati_remote visor pl2303 ftdi_sio pci_hotplug soundcore backlight option processor usb_wwan rtc_cmos thermal_sys rtc_core hwmon parport_pc button snd_page_alloc parport usbserial wmi i2c_i801 evdev rtc_lib sata_mv pcspkr intel_agp intel_gtt agpgart tpm_tis r8169 iTCO_wdt iTCO_vendor_support xhci_hcd ehci_hcd usbcore
>> > kernel: Pid: 1636, comm: scsi_eh_9 Not tainted 2.6.39.1-core2-volpreempt-noide-hm64-20110620 #2
>> > kernel: Call Trace:
>> > kernel:  [<c0133599>] warn_slowpath_common+0x60/0x75
>> > kernel:  [<c01335bd>] warn_slowpath_null+0xf/0x13
>> > kernel:  [<c0370812>] ata_sff_queue_pio_task+0x26/0x44
>> > kernel:  [<c0370946>] ata_sff_qc_issue+0x116/0x14d
>> > kernel:  [<c03709d6>] ata_bmdma_qc_issue+0x59/0x156
>> > kernel:  [<f844650b>] mv_qc_issue+0x441/0x44d [sata_mv]
>> > kernel:  [<c028ea13>] ? vsnprintf+0x80/0x2d7
>> > kernel:  [<c014b5bb>] ? up+0x2b/0x2f
>> > kernel:  [<c036309d>] ata_qc_issue+0x30b/0x329
>> > kernel:  [<c03638c2>] ata_exec_internal_sg+0x27f/0x4a0
>> > kernel:  [<c036f84b>] ? ata_sff_tf_read+0x53/0xde
>> > kernel:  [<c0363b41>] ata_exec_internal+0x5e/0x66
>> > kernel:  [<c036a0a3>] ? ata_eh_done+0x12/0x18
>> > kernel:  [<c037213a>] sata_pmp_read+0x66/0x9d
>> > kernel:  [<c0372197>] sata_pmp_read_gscr+0x26/0x65
>> > kernel:  [<c0371e77>] ? ata_sff_softreset+0x150/0x150
>> > kernel:  [<c03727b8>] sata_pmp_error_handler+0x2ff/0xa42
>> > kernel:  [<c01289e3>] ? dequeue_task_fair+0x1fc/0x204
>> > kernel:  [<c03704f9>] ? ata_sff_drain_fifo+0x5a/0x5a
>> > kernel:  [<f8445f41>] ? mv_port_start+0x19f/0x19f [sata_mv]
>> > kernel:  [<f8445c50>] ? mv_pmp_hardreset+0x8c/0x8c [sata_mv]
>> > kernel:  [<c0371e77>] ? ata_sff_softreset+0x150/0x150
>> > kernel:  [<c044194d>] ? __mutex_lock_slowpath+0x1f2/0x1fa
>> > kernel:  [<c013cadd>] ? lock_timer_base+0x1f/0x3e
>> > kernel:  [<f8445bbf>] mv_pmp_error_handler+0x60/0x65 [sata_mv]
>> > kernel:  [<c036e283>] ata_scsi_port_error_handler+0x206/0x522
>> > kernel:  [<c01448f6>] ? cancel_delayed_work_sync+0xb/0xd
>> > kernel:  [<c036e60c>] ata_scsi_error+0x6d/0x8f
>> > kernel:  [<c032ad17>] ? scsi_eh_get_sense+0x16d/0x16d
>> > kernel:  [<c032ae1a>] scsi_error_handler+0x103/0x507
>> > kernel:  [<c012750b>] ? complete+0x34/0x3e
>> > kernel:  [<c032ad17>] ? scsi_eh_get_sense+0x16d/0x16d
>> > kernel:  [<c01476c0>] kthread+0x64/0x69
>> > kernel:  [<c014765c>] ? kthread_worker_fn+0x119/0x119
>> > kernel:  [<c0443bbe>] kernel_thread_helper+0x6/0xd
>> > kernel: ---[ end trace cdcd2b0b3f6829ed ]---
>> > kernel: ata10.00: hard resetting link
>> > kernel: ata10.01: hard resetting link
>> > kernel: ata10.01: link resume succeeded after 1 retries
>> > kernel: ata10.02: hard resetting link
>> > kernel: ata10.02: link resume succeeded after 1 retries
>> > kernel: ata10.03: hard resetting link
>> > kernel: ata10.03: link resume succeeded after 1 retries
>> > kernel: ata10.04: hard resetting link
>> > kernel: ata10.04: link resume succeeded after 1 retries
>> > kernel: ata10.05: hard resetting link
>> > kernel: ata10.00: configured for UDMA/133
>> > kernel: ata10.01: ATA-7: ST3500630AS, 3.AAE, max UDMA/133
>> > kernel: ata10.01: 976773168 sectors, multi 0: LBA48 NCQ (depth 31/32)
>> > kernel: ata10.01: configured for UDMA/133
>> > kernel: ata10.02: qc timeout (cmd 0x27)
>> > kernel: ata10.02: failed to read native max address (err_mask=0x4)
>> > kernel: ata10.02: HPA support seems broken, skipping HPA handling
>> > kernel: ata10.15: hard resetting link
>> > kernel: ata10.15: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
>> > kernel: ------------[ cut here ]------------
>> > kernel: WARNING: at drivers/ata/libata-sff.c:1322 ata_sff_queue_pio_task+0x26/0x44()
>> > kernel: Hardware name: System Product Name
>> > kernel: Modules linked in: keyspan ati_remote visor pl2303 ftdi_sio pci_hotplug soundcore backlight option processor usb_wwan rtc_cmos thermal_sys rtc_core hwmon parport_pc button snd_page_alloc parport usbserial wmi i2c_i801 evdev rtc_lib sata_mv pcspkr intel_agp intel_gtt agpgart tpm_tis r8169 iTCO_wdt iTCO_vendor_support xhci_hcd ehci_hcd usbcore
>> > kernel: Pid: 1636, comm: scsi_eh_9 Tainted: G        W   2.6.39.1-core2-volpreempt-noide-hm64-20110620 #2
>> > kernel: Call Trace:
>> > kernel:  [<c0133599>] warn_slowpath_common+0x60/0x75
>> > kernel:  [<c01335bd>] warn_slowpath_null+0xf/0x13
>> > kernel:  [<c0370812>] ata_sff_queue_pio_task+0x26/0x44
>> > kernel:  [<c0370946>] ata_sff_qc_issue+0x116/0x14d
>> > kernel:  [<c03709d6>] ata_bmdma_qc_issue+0x59/0x156
>> > kernel:  [<f844650b>] mv_qc_issue+0x441/0x44d [sata_mv]
>> > kernel:  [<c028ea13>] ? vsnprintf+0x80/0x2d7
>> > kernel:  [<c014b5bb>] ? up+0x2b/0x2f
>> > kernel:  [<c036309d>] ata_qc_issue+0x30b/0x329
>> > kernel:  [<c03638c2>] ata_exec_internal_sg+0x27f/0x4a0
>> > kernel:  [<c036f84b>] ? ata_sff_tf_read+0x53/0xde
>> > kernel:  [<c0363b41>] ata_exec_internal+0x5e/0x66
>> > kernel:  [<c036a0a3>] ? ata_eh_done+0x12/0x18
>> > kernel:  [<c037213a>] sata_pmp_read+0x66/0x9d
>> > kernel:  [<c0372197>] sata_pmp_read_gscr+0x26/0x65
>> > kernel:  [<c0371e77>] ? ata_sff_softreset+0x150/0x150
>> > kernel:  [<c03727b8>] sata_pmp_error_handler+0x2ff/0xa42
>> > kernel:  [<c01289e3>] ? dequeue_task_fair+0x1fc/0x204
>> > kernel:  [<c03704f9>] ? ata_sff_drain_fifo+0x5a/0x5a
>> > kernel:  [<f8445f41>] ? mv_port_start+0x19f/0x19f [sata_mv]
>> > kernel:  [<f8445c50>] ? mv_pmp_hardreset+0x8c/0x8c [sata_mv]
>> > kernel:  [<c0371e77>] ? ata_sff_softreset+0x150/0x150
>> > kernel:  [<c044194d>] ? __mutex_lock_slowpath+0x1f2/0x1fa
>> > kernel:  [<c013cadd>] ? lock_timer_base+0x1f/0x3e
>> > kernel:  [<f8445bbf>] mv_pmp_error_handler+0x60/0x65 [sata_mv]
>> > kernel:  [<c036e283>] ata_scsi_port_error_handler+0x206/0x522
>> > kernel:  [<c01448f6>] ? cancel_delayed_work_sync+0xb/0xd
>> > kernel:  [<c036e60c>] ata_scsi_error+0x6d/0x8f
>> > kernel:  [<c032ad17>] ? scsi_eh_get_sense+0x16d/0x16d
>> > kernel:  [<c032ae1a>] scsi_error_handler+0x103/0x507
>> > kernel:  [<c012750b>] ? complete+0x34/0x3e
>> > kernel:  [<c032ad17>] ? scsi_eh_get_sense+0x16d/0x16d
>> > kernel:  [<c01476c0>] kthread+0x64/0x69
>> > kernel:  [<c014765c>] ? kthread_worker_fn+0x119/0x119
>> > kernel:  [<c0443bbe>] kernel_thread_helper+0x6/0xd
>> > kernel: ---[ end trace cdcd2b0b3f6829ee ]---
>> > kernel: ata10.00: hard resetting link
>> > kernel: ata10.01: hard resetting link
>> > kernel: ata10.01: link resume succeeded after 1 retries
>> > kernel: ata10.02: hard resetting link
>> > kernel: ata10.02: link resume succeeded after 1 retries
>> > kernel: ata10.03: hard resetting link
>> > kernel: ata10.03: link resume succeeded after 1 retries
>> > kernel: ata10.04: hard resetting link
>> > kernel: ata10.04: link resume succeeded after 1 retries
>> > kernel: ata10.05: hard resetting link
>> > kernel: ata10.00: configured for UDMA/133
>> > kernel: ata10.01: configured for UDMA/133
>> > kernel: ata10.02: ATA-7: ST3500630AS, 3.AAE, max UDMA/133
>> > kernel: ata10.02: 976773168 sectors, multi 0: LBA48 NCQ (depth 31/32)
>> > kernel: ata10.02: configured for UDMA/133
>> > kernel: ata10.03: qc timeout (cmd 0x27)
>> > kernel: ata10.03: failed to read native max address (err_mask=0x4)
>> > kernel: ata10.03: HPA support seems broken, skipping HPA handling
>> > kernel: ata10.15: hard resetting link
>> > kernel: ata10.15: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
>> > kernel: ------------[ cut here ]------------
>> > kernel: WARNING: at drivers/ata/libata-sff.c:1322 ata_sff_queue_pio_task+0x26/0x44()
>> > kernel: Hardware name: System Product Name
>> > kernel: Modules linked in: keyspan ati_remote visor pl2303 ftdi_sio pci_hotplug soundcore backlight option processor usb_wwan rtc_cmos thermal_sys rtc_core hwmon parport_pc button snd_page_alloc parport usbserial wmi i2c_i801 evdev rtc_lib sata_mv pcspkr intel_agp intel_gtt agpgart tpm_tis r8169 iTCO_wdt iTCO_vendor_support xhci_hcd ehci_hcd usbcore
>> > kernel: Pid: 1636, comm: scsi_eh_9 Tainted: G        W   2.6.39.1-core2-volpreempt-noide-hm64-20110620 #2
>> > kernel: Call Trace:
>> > kernel:  [<c0133599>] warn_slowpath_common+0x60/0x75
>> > kernel:  [<c01335bd>] warn_slowpath_null+0xf/0x13
>> > kernel:  [<c0370812>] ata_sff_queue_pio_task+0x26/0x44
>> > kernel:  [<c0370946>] ata_sff_qc_issue+0x116/0x14d
>> > kernel:  [<c03709d6>] ata_bmdma_qc_issue+0x59/0x156
>> > kernel:  [<f844650b>] mv_qc_issue+0x441/0x44d [sata_mv]
>> > kernel:  [<c028ea13>] ? vsnprintf+0x80/0x2d7
>> > kernel:  [<c014b5bb>] ? up+0x2b/0x2f
>> > kernel:  [<c036309d>] ata_qc_issue+0x30b/0x329
>> > kernel:  [<c03638c2>] ata_exec_internal_sg+0x27f/0x4a0
>> > kernel:  [<c036f84b>] ? ata_sff_tf_read+0x53/0xde
>> > kernel:  [<c0363b41>] ata_exec_internal+0x5e/0x66
>> > kernel:  [<c036a0a3>] ? ata_eh_done+0x12/0x18
>> > kernel:  [<c037213a>] sata_pmp_read+0x66/0x9d
>> > kernel:  [<c0372197>] sata_pmp_read_gscr+0x26/0x65
>> > kernel:  [<c0371e77>] ? ata_sff_softreset+0x150/0x150
>> > kernel:  [<c03727b8>] sata_pmp_error_handler+0x2ff/0xa42
>> > kernel:  [<c01289e3>] ? dequeue_task_fair+0x1fc/0x204
>> > kernel:  [<c03704f9>] ? ata_sff_drain_fifo+0x5a/0x5a
>> > kernel:  [<f8445f41>] ? mv_port_start+0x19f/0x19f [sata_mv]
>> > kernel:  [<f8445c50>] ? mv_pmp_hardreset+0x8c/0x8c [sata_mv]
>> > kernel:  [<c0371e77>] ? ata_sff_softreset+0x150/0x150
>> > kernel:  [<c044194d>] ? __mutex_lock_slowpath+0x1f2/0x1fa
>> > kernel:  [<c013cadd>] ? lock_timer_base+0x1f/0x3e
>> > kernel:  [<f8445bbf>] mv_pmp_error_handler+0x60/0x65 [sata_mv]
>> > kernel:  [<c036e283>] ata_scsi_port_error_handler+0x206/0x522
>> > kernel:  [<c01448f6>] ? cancel_delayed_work_sync+0xb/0xd
>> > kernel:  [<c036e60c>] ata_scsi_error+0x6d/0x8f
>> > kernel:  [<c032ad17>] ? scsi_eh_get_sense+0x16d/0x16d
>> > kernel:  [<c032ae1a>] scsi_error_handler+0x103/0x507
>> > kernel:  [<c012750b>] ? complete+0x34/0x3e
>> > kernel:  [<c032ad17>] ? scsi_eh_get_sense+0x16d/0x16d
>> > kernel:  [<c01476c0>] kthread+0x64/0x69
>> > kernel:  [<c014765c>] ? kthread_worker_fn+0x119/0x119
>> > kernel:  [<c0443bbe>] kernel_thread_helper+0x6/0xd
>> > kernel: ---[ end trace cdcd2b0b3f6829ef ]---
>> > kernel: ata10.00: hard resetting link
>> > kernel: ata10.01: hard resetting link
>> > kernel: ata10.01: link resume succeeded after 1 retries
>> > kernel: ata10.02: hard resetting link
>> > kernel: ata10.02: link resume succeeded after 1 retries
>> > kernel: ata10.03: hard resetting link
>> > kernel: ata10.03: link resume succeeded after 1 retries
>> > kernel: ata10.04: hard resetting link
>> > kernel: ata10.04: link resume succeeded after 1 retries
>> > kernel: ata10.05: hard resetting link
>> > kernel: ata10.00: configured for UDMA/133
>> > kernel: ata10.01: configured for UDMA/133
>> > kernel: ata10.02: configured for UDMA/133
>> > kernel: ata10.03: ATA-7: ST3500630AS, 3.AAE, max UDMA/133
>> > kernel: ata10.03: 976773168 sectors, multi 0: LBA48 NCQ (depth 31/32)
>> > kernel: ata10.03: configured for UDMA/133
>> > kernel: ata10.04: ATA-7: ST3750640AS, 3.AAK, max UDMA/133
>> > kernel: ata10.04: 1465149168 sectors, multi 0: LBA48 NCQ (depth 31/32)
>> > kernel: ata10.04: configured for UDMA/133
>> > kernel: ata10: EH complete
>> > kernel: scsi 9:0:0:0: Direct-Access     ATA      ST3500630AS      3.AA PQ: 0 ANSI: 5
>> > kernel: sd 9:0:0:0: [sdc] 976773168 512-byte logical blocks: (500 GB/465 GiB)
>> > kernel: sd 9:0:0:0: [sdc] Write Protect is off
>> > kernel: sd 9:0:0:0: [sdc] Mode Sense: 00 3a 00 00
>> > kernel: sd 9:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
>> > kernel: scsi 9:1:0:0: Direct-Access     ATA      ST3500630AS      3.AA PQ: 0 ANSI: 5
>> > kernel: sd 9:1:0:0: [sdd] 976773168 512-byte logical blocks: (500 GB/465 GiB)
>> > kernel: sd 9:1:0:0: [sdd] Write Protect is off
>> > kernel: sd 9:1:0:0: [sdd] Mode Sense: 00 3a 00 00
>> > kernel: sd 9:1:0:0: [sdd] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
>> > kernel: scsi 9:2:0:0: Direct-Access     ATA      ST3500630AS      3.AA PQ: 0 ANSI: 5
>> > kernel: sd 9:2:0:0: [sde] 976773168 512-byte logical blocks: (500 GB/465 GiB)
>> > kernel: sd 9:2:0:0: [sde] Write Protect is off
>> > kernel: sd 9:2:0:0: [sde] Mode Sense: 00 3a 00 00
>> > kernel: sd 9:2:0:0: [sde] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
>> > kernel: scsi 9:3:0:0: Direct-Access     ATA      ST3500630AS      3.AA PQ: 0 ANSI: 5
>> > kernel: sd 9:3:0:0: [sdf] 976773168 512-byte logical blocks: (500 GB/465 GiB)
>> > kernel: sd 9:3:0:0: [sdf] Write Protect is off
>> > kernel: sd 9:3:0:0: [sdf] Mode Sense: 00 3a 00 00
>> > kernel: sd 9:3:0:0: [sdf] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
>> > kernel: scsi 9:4:0:0: Direct-Access     ATA      ST3750640AS      3.AA PQ: 0 ANSI: 5
>> > kernel: sd 9:4:0:0: [sdg] 1465149168 512-byte logical blocks: (750 GB/698 GiB)
>> > kernel: sd 9:4:0:0: [sdg] Write Protect is off
>> > kernel: sd 9:4:0:0: [sdg] Mode Sense: 00 3a 00 00
>> > kernel: sd 9:4:0:0: [sdg] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
>> > kernel:  sdc: sdc1
>> > kernel: sd 9:0:0:0: [sdc] Attached SCSI disk
>> > kernel:  sdg: sdg1 sdg2
>> > kernel: sd 9:4:0:0: [sdg] Attached SCSI disk
>> > kernel:  sdd: sdd1
>> > kernel: sd 9:1:0:0: [sdd] Attached SCSI disk
>> > kernel:  sde: sde1
>> > kernel:  sdf: sdf1
>> > kernel: sd 9:2:0:0: [sde] Attached SCSI disk
>> > kernel: sd 9:3:0:0: [sdf] Attached SCSI disk
>> > kernel: ata11: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
>> > kernel: ata11.15: Port Multiplier 1.1, 0x1095:0x3726 r23, 6 ports, feat 0x1/0x9
>> > kernel: ata11.00: hard resetting link
>> > kernel: ata11.01: hard resetting link
>> > kernel: ata11.02: hard resetting link
>> > kernel: ata11.03: hard resetting link
>> > kernel: ata11.04: hard resetting link
>> > kernel: ata11.05: hard resetting link
>> > kernel: ata11.00: ATA-8: WDC WD20EADS-00W4B0, 01.00A01, max UDMA/133
>> > kernel: ata11.00: 3907029168 sectors, multi 0: LBA48 NCQ (depth 31/32)
>> > kernel: ata11.00: configured for Uel kernel: ata11.02: ATA-8: WDC WD20EADS-00R6B0, 01.00A01, max UDMA/133
>> > kernel: ata11.02: 3907029168 sectors, multi 0: LBA48 NCQ (depth 31/32)
>> > kernel: ata11.02: configured for UDMA/133
>> > kernel: ata11.03: ATA-8: WDC WD20EADS-00R6B0, 01.00A01, max UDMA/133
>> > kernel: ata11.03: 3907029168 sectors, multi 0: LBA48 NCQ (depth 31/32)
>> > kernel: ata11.03: configured for UDMA/133
>> > kernel: ata11.04: ATA-8: WDC WD20EADS-00S2B0, 01.00A01, max UDMA/133
>> > kernel: ata11.04: 3907029168 sectors, multi 0: LBA48 NCQ (depth 31/32)
>> > kernel: ata11.04: configured for UDMA/133
>> > kernel: ata11: EH complete
>> > kernel: scsi 10:0:0:0: Direct-Access     ATA      WDC WD20EADS-00W 01.0 PQ: 0 ANSI: 5
>> > kernel: sd 10:0:0:0: [sdh] 3907029168 512-byte logical blocks: (2.00 TB/1.81 TiB)
>> > kernel: sd 10:0:0:0: [sdh] Write Protect is off
>> > kernel: sd 10:0:0:0: [sdh] Mode Sense: 00 3a 00 00
>> > kernel: sd 10:0:0:0: [sdh] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
>> > kernel: scsi 10:1:0:0: Direct-Access     ATA      WDC WD20EADS-00R 01.0 PQ: 0 ANSI: 5
>> > kernel: sd 10:1:0:0: [sdi] 3907029168 512-byte logical blocks: (2.00 TB/1.81 TiB)
>> > kernel: sd 10:1:0:0: [sdi] Write Protect is off
>> > kernel: sd 10:1:0:0: [sdi] Mode Sense: 00 3a 00 00
>> > kernel: sd 10:1:0:0: [sdi] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
>> > kernel: scsi 10:2:0:0: Direct-Access     ATA      WDC WD20EADS-00R 01.0 PQ: 0 ANSI: 5
>> > kernel: sd 10:2:0:0: [sdj] 3907029168 512-byte logical blocks: (2.00 TB/1.81 TiB)
>> > kernel: sd 10:2:0:0: [sdj] Write Protect is off
>> > kernel: sd 10:2:0:0: [sdj] Mode Sense: 00 3a 00 00
>> > kernel: sd 10:2:0:0: [sdj] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
>> > kernel: scsi 10:3:0:0: Direct-Access     ATA      WDC WD20EADS-00R 01.0 PQ: 0 ANSI: 5
>> > kernel: sd 10:3:0:0: [sdk] 3907029168 512-byte logical blocks: (2.00 TB/1.81 TiB)
>> > kernel: sd 10:3:0:0: [sdk] Write Protect is off
>> > kernel: sd 10:3:0:0: [sdk] Mode Sense: 00 3a 00 00
>> > kernel: sd 10:3:0:0: [sdk] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
>> > kernel: scsi 10:4:0:0: Direct-Access     ATA      WDC WD20EADS-00S 01.0 PQ: 0 ANSI: 5
>> > kernel: sd 10:4:0:0: [sdl] 3907029168 512-byte logical blocks: (2.00 TB/1.81 TiB)
>> > kernel: sd 10:4:0:0: [sdl] Write Protect is off
>> > kernel: sd 10:4:0:0: [sdl] Mode Sense: 00 3a 00 00
>> > kernel: sd 10:4:0:0: [sdl] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
>> > kernel:  sdi: sdi1
>> > kernel: sd 10:1:0:0: [sdi] Attached SCSI disk
>> > kernel:  sdk: sdk1
>> > kernel: sd 10:3:0:0: [sdk] Attached SCSI disk
>> > kernel:  sdl: sdl1
>> > kernel: sd 10:4:0:0: [sdl] Attached SCSI disk
>> > kernel:  sdj: sdj1
>> > kernel: sd 10:2:0:0: [sdj] Attached SCSI disk
>> > kernel: ata12: SATA link down (SStatus 0 SControl 300)
>> > kernel:  sdh: sdh1
>> > kernel: sd 10:0:0:0: [sdh] Attached SCSI disk
>>
>>
>> Those WARNINGS are probably harmless right now, so don't panic over them.
>> Not hardware related; more just alerting Tejun to a possible libata bug.
>>
>> cheers
>> --
>> Mark Lord
>> Real-Time Remedies Inc.
>> mlord@xxxxxxxxx
>
> --
> tejun
>
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