I have a P5Q Deluxe motherboard which comes with ICH10R. One of my hard disks is a Samsung Deskstar 7K400 HDS724040KLSA80 (http://www.hitachigst.com/hdd/support/7k400/7k400.htm). I have set ICH10R in AHCI mode in BIOS. It is almost impossible to get the hard disk to initialize properly. Here is the relevant portion of the kernel log: ... ahci 0000:00:1f.2: version 3.0 ahci 0000:00:1f.2: PCI INT B -> GSI 19 (level, low) -> IRQ 19 ahci 0000:00:1f.2: AHCI 0001.0200 32 slots 6 ports 3 Gbps 0x3f impl SATA mode ahci 0000:00:1f.2: flags: 64bit ncq sntf stag pm led clo pmp pio slum part ems ahci 0000:00:1f.2: setting latency timer to 64 scsi0 : ahci scsi1 : ahci scsi2 : ahci scsi3 : ahci scsi4 : ahci scsi5 : ahci ata1: SATA max UDMA/133 abar m2048@0xfbffe800 port 0xfbffe900 irq 219 ata2: SATA max UDMA/133 abar m2048@0xfbffe800 port 0xfbffe980 irq 219 ata3: SATA max UDMA/133 abar m2048@0xfbffe800 port 0xfbffea00 irq 219 ata4: SATA max UDMA/133 abar m2048@0xfbffe800 port 0xfbffea80 irq 219 ata5: SATA max UDMA/133 abar m2048@0xfbffe800 port 0xfbffeb00 irq 219 ata6: SATA max UDMA/133 abar m2048@0xfbffe800 port 0xfbffeb80 irq 219 Switched to high resolution mode on CPU 1 Switched to high resolution mode on CPU 0 ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300) ata1.00: ATA-7: SAMSUNG HD400LJ, ZZ100-15, max UDMA7 ata1.00: 781422768 sectors, multi 0: LBA48 NCQ (depth 31/32) ata1.00: configured for UDMA/133 ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 300) ata2.00: qc timeout (cmd 0x27) ata2.00: failed to read native max address (err_mask=0x4) ata2.00: HPA support seems broken, skipping HPA handling ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 300) ata2.00: qc timeout (cmd 0xef) ata2.00: failed to set xfermode (err_mask=0x4) ata2: limiting SATA link speed to 1.5 Gbps ata2.00: limiting speed to UDMA/100:PIO3 ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 310) ata2.00: qc timeout (cmd 0xef) ata2.00: failed to set xfermode (err_mask=0x4) ata2.00: disabled ata2: hard resetting link ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 310) ata2: EH complete ata3: SATA link down (SStatus 0 SControl 300) ata4: SATA link down (SStatus 0 SControl 300) ata5: SATA link down (SStatus 0 SControl 300) ata6: SATA link down (SStatus 0 SControl 300) scsi 0:0:0:0: Direct-Access ATA SAMSUNG HD400LJ ZZ10 PQ: 0 ANSI: 5 sd 0:0:0:0: [sda] 781422768 512-byte hardware sectors (400088 MB) sd 0:0:0:0: [sda] Write Protect is off sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00 sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA sd 0:0:0:0: [sda] 781422768 512-byte hardware sectors (400088 MB) sd 0:0:0:0: [sda] Write Protect is off sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00 sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA sda: sda1 sda2 sda3 sda4 < sda5 sda6 sda7 sda8 > sd 0:0:0:0: [sda] Attached SCSI disk ... Consequently there is no device node created. On some extremely rare occasions these errors will not show up and the disk will be usable but these are few and far between. Here is a log when this happens: ... ahci 0000:00:1f.2: version 3.0 ahci 0000:00:1f.2: PCI INT B -> GSI 19 (level, low) -> IRQ 19 ahci 0000:00:1f.2: AHCI 0001.0200 32 slots 6 ports 3 Gbps 0x3f impl SATA mode ahci 0000:00:1f.2: flags: 64bit ncq sntf stag pm led clo pmp pio slum part ems ahci 0000:00:1f.2: setting latency timer to 64 scsi0 : ahci scsi1 : ahci scsi2 : ahci scsi3 : ahci scsi4 : ahci scsi5 : ahci ata1: SATA max UDMA/133 abar m2048@0xfbffe800 port 0xfbffe900 irq 219 ata2: SATA max UDMA/133 abar m2048@0xfbffe800 port 0xfbffe980 irq 219 ata3: SATA max UDMA/133 abar m2048@0xfbffe800 port 0xfbffea00 irq 219 ata4: SATA max UDMA/133 abar m2048@0xfbffe800 port 0xfbffea80 irq 219 ata5: SATA max UDMA/133 abar m2048@0xfbffe800 port 0xfbffeb00 irq 219 ata6: SATA max UDMA/133 abar m2048@0xfbffe800 port 0xfbffeb80 irq 219 ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300) ata1.00: ATA-7: SAMSUNG HD400LJ, ZZ100-15, max UDMA7 ata1.00: 781422768 sectors, multi 16: LBA48 NCQ (depth 31/32) ata1.00: configured for UDMA/133 ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 300) ata2.00: qc timeout (cmd 0x27) ata2.00: failed to read native max address (err_mask=0x4) ata2.00: HPA support seems broken, skipping HPA handling ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 300) ata2.00: qc timeout (cmd 0xef) ata2.00: failed to set xfermode (err_mask=0x4) ata2: limiting SATA link speed to 1.5 Gbps ata2.00: limiting speed to UDMA/100:PIO3 ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 310) ata2.00: configured for UDMA/100 ata3: SATA link down (SStatus 0 SControl 300) ata4: SATA link down (SStatus 0 SControl 300) ata5: SATA link down (SStatus 0 SControl 300) ata6: SATA link down (SStatus 0 SControl 300) scsi 0:0:0:0: Direct-Access ATA SAMSUNG HD400LJ ZZ10 PQ: 0 ANSI: 5 sd 0:0:0:0: [sda] 781422768 512-byte hardware sectors (400088 MB) sd 0:0:0:0: [sda] Write Protect is off sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00 sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA sd 0:0:0:0: [sda] 781422768 512-byte hardware sectors (400088 MB) sd 0:0:0:0: [sda] Write Protect is off sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00 sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA sda: sda1 sda2 sda3 sda4 < sda5 sda6 sda7 sda8 > sd 0:0:0:0: [sda] Attached SCSI disk scsi 1:0:0:0: Direct-Access ATA HDS724040KLSA80 KFAO PQ: 0 ANSI: 5 sd 1:0:0:0: [sdb] 781422768 512-byte hardware sectors (400088 MB) sd 1:0:0:0: [sdb] Write Protect is off sd 1:0:0:0: [sdb] Mode Sense: 00 3a 00 00 sd 1:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA sd 1:0:0:0: [sdb] 781422768 512-byte hardware sectors (400088 MB) sd 1:0:0:0: [sdb] Write Protect is off t-rex sd 1:0:0:0: [sdb] Mode Sense: 00 3a 00 00 sd 1:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA sdb: sdb1 sdb2 sdb4 < sdb5 sdb6 > sd 1:0:0:0: [sdb] Attached SCSI disk ... After some googling I found something that might be relevant: http://www.mail-archive.com/linux-ide@xxxxxxxxxxxxxxx/msg09294.html. However I am running 2.6.27.10 and afaict this patch is included. B. -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
