[Bugme-new] [Bug 12576] New: Motherboard fails to detect more than 4 SATA

[bugme-daemon at bugzilla.kernel.org]

http://bugzilla.kernel.org/show_bug.cgi?id=12576

           Summary: Motherboard fails to detect more than 4 SATA
           Product: IO/Storage
           Version: 2.5
     KernelVersion: 2.6.28.1
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Serial ATA
        AssignedTo: jgarzik at pobox.com
        ReportedBy: rercola at acm.jhu.edu


Latest working kernel version: None
Earliest failing kernel version: 2.6.28.1
Distribution: Fedora 10
Hardware Environment: Intel BX97520J, two SATA chips onboard, Marvell 88SE6145
and Intel 82801GR/GH AHCI.
Software Environment: Fedora 10
Problem Description:
I have a motherboard with the two above SATA chipsets, each with four ports.

It seems like the motherboard is failing to detect more than 4 SATA disks at a
time. I've tried to plug in a fifth disk, and I receive a timeout on the SATA
port.

It does not matter if it's on one chipset or the other, and I've swapped it
across multiple disks, SATA cables, and SATA ports. I still can't see more than
4 devices at a time.

Steps to reproduce:
1) Plug 5 SATA devices in, any 5.
2) Watch as you find 4 devices.
3) Be sad.

Only interesting thing I spotted in dmesg:
ata8: link is slow to respond, please be patient (ready=0)
ata8: SRST failed (errno=-16)
ata8: link is slow to respond, please be patient (ready=0)
ata8: SRST failed (errno=-16)
ata8: link is slow to respond, please be patient (ready=0)
irq 16: nobody cared (try booting with the "irqpoll" option)
Pid: 0, comm: swapper Not tainted 2.6.28.1-19.fc10.x86_64 #1
Call Trace:
 <IRQ>  [<ffffffff810896f3>] __report_bad_irq+0x38/0x87
 [<ffffffff81089850>] note_interrupt+0x10e/0x172
 [<ffffffff81089f0e>] handle_fasteoi_irq+0xac/0xdb
 [<ffffffff81013dcf>] do_IRQ+0xfc/0x175
 [<ffffffff81011758>] ret_from_intr+0x0/0x2e
 <EOI>  [<ffffffff810184a0>] ? mwait_idle+0x3e/0x4f
 [<ffffffff81018497>] ? mwait_idle+0x35/0x4f
 [<ffffffff81010242>] ? cpu_idle+0x5b/0xb4
 [<ffffffff81350f34>] ? start_secondary+0x197/0x19c
handlers:
[<ffffffff8125512a>] (usb_hcd_irq+0x0/0xb3)
[<ffffffff8123e5bd>] (ata_sff_interrupt+0x0/0xc2)
Disabling IRQ #16


-- 
Configure bugmail: http://bugzilla.kernel.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are on the CC list for the bug, or are watching someone who is.