What do these messages of 'SATA link down' mean?
Issue
- What does 'SATA link down' messages mean as seen in system logs:
libata version 3.00 loaded. ata_piix 0000:00:1f.2: version 2.12 ACPI: PCI Interrupt 0000:00:1f.2[A] -> GSI 16 (level, low) -> IRQ 217 ata_piix 0000:00:1f.2: MAP [ P0 P2 P1 P3 ] ata_piix 0000:00:1f.2: 0x1F0 IDE port busy PCI: Setting latency timer of device 0000:00:1f.2 to 64 ata1: DUMMY ata2: SATA max UDMA/133 bmdma 0x60f8 irq 15 GSI 26 sharing vector 0x82 and IRQ 26 ACPI: PCI Interrupt 0000:00:1f.5[C] -> GSI 21 (level, low) -> IRQ 130 ata_piix 0000:00:1f.5: MAP [ P0 -- P1 -- ] PCI: Setting latency timer of device 0000:00:1f.5 to 64 ata3: SATA max UDMA/133 cmd 0x6108 ctl 0x6124 bmdma 0x60d0 irq 130 ata4: SATA max UDMA/133 cmd 0x6100 ctl 0x6120 bmdma 0x60d8 irq 130 ata3: SATA link down (SStatus 0 SControl 300) ata4: SATA link down (SStatus 0 SControl 300)
- DVD drive on system suddenly became unavailable. How do I fix this issue?
kernel: ata2: exception Emask 0x50 SAct 0x0 SErr 0x4090800 action 0xe frozen kernel: ata2: irq_stat 0x00400040, connection status changed kernel: ata2: SError: { HostInt PHYRdyChg 10B8B DevExch } kernel: ata2: hard resetting link kernel: ata2: SATA link down (SStatus 1 SControl 300) kernel: ata2: hard resetting link kernel: ata2: SATA link down (SStatus 0 SControl 300) kernel: ata2: limiting SATA link speed to 1.5 Gbps kernel: ata2: hard resetting link kernel: ata2: SATA link down (SStatus 1 SControl 310) kernel: ata2.00: disabled kernel: ata2: EH complete kernel: ata2.00: detaching (SCSI 1:0:0:0)
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The SATA link down event messages are logged when there is some issue in the connectivity to disk devices and the driver needs to reset the link connecting these devices. They appears to be some hardware related issues.
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The SATA hard disk is not reliably detected at boot time.
Environment
- Red Hat Enterprise Linux 9
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 5
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