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    SubjectRe: Lots of con-current I/O = resets SATA link? (2.6.25.10)
    Hello!

    I'm having a similar problem with a brand new Hardware under Fedora 9 x64
    8GB RAM
    Motherboard: ASUS M3N-H/HDMI
    Chipset: NForce 8300/Nvidia 750a
    CPU: AMD AM2 5600+, 2.9GHz, Brisbane Dual Core
    Kernel: 2.6.25.9-76.fc9.x86_64
    Smartmontools: smartmontools-5.38-2.fc9.x86_64
    BIOS AHCI mode
    Power cables for ata3 and ata4 are on the same cable from an Enermax
    power supply.

    ata1.00: ATA-7: SAMSUNG HD103UJ, 1AA01109, max UDMA7
    ata2.00: ATA-7: SAMSUNG HD103UJ, 1AA01109, max UDMA7
    ata3.00: ATA-7: SAMSUNG HD103UJ, 1AA01109, max UDMA7
    ata4.00: ATA-7: SAMSUNG HD103UJ, 1AA01109, max UDMA7
    ata5.00: ATA-7: SAMSUNG HD103UJ, 1AA01109, max UDMA7
    ata6.00: ATA-7: SAMSUNG HD103UJ, 1AA01109, max UDMA7
    scsi 0:0:0:0: Direct-Access ATA SAMSUNG HD103UJ 1AA0 PQ: 0 ANSI: 5
    scsi 1:0:0:0: Direct-Access ATA SAMSUNG HD103UJ 1AA0 PQ: 0 ANSI: 5
    scsi 2:0:0:0: Direct-Access ATA SAMSUNG HD103UJ 1AA0 PQ: 0 ANSI: 5
    scsi 3:0:0:0: Direct-Access ATA SAMSUNG HD103UJ 1AA0 PQ: 0 ANSI: 5
    scsi 4:0:0:0: Direct-Access ATA SAMSUNG HD103UJ 1AA0 PQ: 0 ANSI: 5
    scsi 5:0:0:0: Direct-Access ATA SAMSUNG HD103UJ 1AA0 PQ: 0 ANSI: 5

    Problem occours only on ata3, I've changed the disk Port 3 the third time
    (new disks) and changed the SATA cable, too. Problem still exists.

    Sometimes a RAID rebuild doesn't work at all.

    To get the drive to live I've to power down the system.

    Logs are attached.

    Can it be a bug on concurrent access of smartctl/smartd?

    Any ideas?

    Ciao,
    Gerhard

    --
    http://www.wiesinger.com/


    On Sat, 5 Jul 2008, Justin Piszcz wrote:

    > I've read the best way to 'deal' with this issue is to turn off apic/acpi
    > etc, is there any downside to turning them off? Particularly APIC for IRQ
    > routing?
    >
    > This happens on drives on both the Intel 965 chipset motherboard ports and
    > PCI-e x1 cards, and the cables are not the issue (the cables with 12 other
    > 150 raptors have no issues) (same cables I used with them)).
    >
    > With NCQ on or OFF it occurs.
    >
    > $ ls
    > 0/ 10/ 12/ 14/ 16/ 18/ 2/ 3/ 5/ 7/ 9/ runtest.sh*
    > 1/ 11/ 13/ 15/ 17/ 19/ 20/ 4/ 6/ 8/ linux-2.6.25.10.tar
    >
    > $ cat runtest.sh
    > #!/bin/bash
    >
    > for i in `seq 0 20`
    > do
    > cd $i
    > tar xf ../linux-2.6.25.10.tar &
    > cd ..
    > done
    >
    > With NCQ off (earlier) (from just heavy I/O on the raid5):
    > Jul 5 11:50:06 p34 kernel: [112161.433913] ata6.00: exception Emask 0x0 SAct
    > 0x0 SErr 0x0 action 0x2 frozen
    > Jul 5 11:50:06 p34 kernel: [112161.433923] ata6.00: cmd
    > b0/d8:00:00:4f:c2/00:00:00:00:00/00 tag 0
    > Jul 5 11:50:06 p34 kernel: [112161.433924] res
    > 40/00:ff:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
    > Jul 5 11:50:06 p34 kernel: [112161.433927] ata6.00: status: { DRDY }
    > Jul 5 11:50:06 p34 kernel: [112161.736858] ata6: soft resetting link
    > Jul 5 11:50:07 p34 kernel: [112161.889840] ata6: SATA link up 3.0 Gbps
    > (SStatus
    > 123 SControl 300)
    > Jul 5 11:50:07 p34 kernel: [112161.911418] ata6.00: configured for UDMA/133
    > Jul 5 11:50:07 p34 kernel: [112161.656792] sd 5:0:0:0: [sdf] Write Protect
    > is
    > off
    > Jul 5 11:50:07 p34 kernel: [112161.656797] sd 5:0:0:0: [sdf] Mode Sense: 00
    > 3a
    > 00 00
    > Jul 5 11:50:07 p34 kernel: [112161.659296] sd 5:0:0:0: [sdf] Write cache:
    > enabled, read cache: enabled, doesn't support DPO or FUA
    >
    > With NCQ on (with the test shown above):
    > [115786.990237] ata6.00: exception Emask 0x0 SAct 0x3ffff SErr 0x0 action 0x2
    > frozen
    > [115786.990247] ata6.00: cmd 60/80:00:bf:07:94/00:00:10:00:00/40 tag 0 ncq
    > 65536 in
    > [115786.990249] res 40/00:00:00:00:00/00:00:00:00:00/a0 Emask 0x4
    > (timeout)
    > [115786.990254] ata6.00: status: { DRDY }
    > [115786.990259] ata6.00: cmd 60/88:08:b7:ee:c1/01:00:1d:00:00/40 tag 1 ncq
    > 200704 in
    > [115786.990261] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4
    > (timeout)
    > [115786.990265] ata6.00: status: { DRDY }
    > [115786.990270] ata6.00: cmd 60/f8:10:bf:eb:c1/02:00:1d:00:00/40 tag 2 ncq
    > 389120 in
    > [115786.990271] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4
    > (timeout)
    > [115786.990275] ata6.00: status: { DRDY }
    > [115786.990280] ata6.00: cmd 60/c0:18:3f:e8:c1/01:00:1d:00:00/40 tag 3 ncq
    > 229376 in
    > [115786.990282] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4
    > (timeout)
    > [115786.990286] ata6.00: status: { DRDY }
    > [115786.990291] ata6.00: cmd 60/c0:20:ff:e9:c1/01:00:1d:00:00/40 tag 4 ncq
    > 229376 in
    > [115786.990293] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4
    > (timeout)
    > [115786.990297] ata6.00: status: { DRDY }
    > [115786.990302] ata6.00: cmd 61/08:28:0f:c6:b6/00:00:1f:00:00/40 tag 5 ncq
    > 4096 out
    > [115786.990303] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4
    > (timeout)
    > [115786.990307] ata6.00: status: { DRDY }
    > [115786.990312] ata6.00: cmd 61/10:30:df:b0:17/00:00:01:00:00/40 tag 6 ncq
    > 8192 out
    > [115786.990313] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4
    > (timeout)
    > [115786.990318] ata6.00: status: { DRDY }
    > [115786.990323] ata6.00: cmd 61/10:38:4f:88:79/00:00:03:00:00/40 tag 7 ncq
    > 8192 out
    > [115786.990324] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4
    > (timeout)
    > [115786.990328] ata6.00: status: { DRDY }
    > [115786.990333] ata6.00: cmd 61/10:40:3f:18:95/00:00:05:00:00/40 tag 8 ncq
    > 8192 out
    > [115786.990335] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4
    > (timeout)
    > [115786.990339] ata6.00: status: { DRDY }
    > [115786.990344] ata6.00: cmd 61/08:48:d7:f6:a9/00:00:06:00:00/40 tag 9 ncq
    > 4096 out
    > [115786.990345] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4
    > (timeout)
    > [115786.990350] ata6.00: status: { DRDY }
    > [115786.990355] ata6.00: cmd 61/08:50:9f:37:b7/00:00:07:00:00/40 tag 10 ncq
    > 4096 out
    > [115786.990356] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4
    > (timeout)
    > [115786.990360] ata6.00: status: { DRDY }
    > [115786.990365] ata6.00: cmd 61/08:58:27:7c:d1/00:00:08:00:00/40 tag 11 ncq
    > 4096 out
    > [115786.990367] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4
    > (timeout)
    > [115786.990371] ata6.00: status: { DRDY }
    > [115786.990376] ata6.00: cmd 61/08:60:97:48:46/00:00:0d:00:00/40 tag 12 ncq
    > 4096 out
    > [115786.990377] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4
    > (timeout)
    > [115786.990381] ata6.00: status: { DRDY }
    > [115786.990386] ata6.00: cmd 61/08:68:cf:b4:68/00:00:0e:00:00/40 tag 13 ncq
    > 4096 out
    > [115786.990388] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4
    > (timeout)
    > [115786.990392] ata6.00: status: { DRDY }
    > [115786.990397] ata6.00: cmd 61/80:70:3f:06:94/01:00:10:00:00/40 tag 14 ncq
    > 196608 out
    > [115786.990398] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4
    > (timeout)
    > [115786.990402] ata6.00: status: { DRDY }
    > [115786.990408] ata6.00: cmd 61/08:78:7f:a4:88/00:00:11:00:00/40 tag 15 ncq
    > 4096 out
    > [115786.990409] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4
    > (timeout)
    > [115786.990413] ata6.00: status: { DRDY }
    > [115786.990418] ata6.00: cmd 61/08:80:37:b8:d5/00:00:13:00:00/40 tag 16 ncq
    > 4096 out
    > [115786.990419] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4
    > (timeout)
    > [115786.990423] ata6.00: status: { DRDY }
    > [115786.990428] ata6.00: cmd 61/08:88:c7:a4:8b/00:00:1d:00:00/40 tag 17 ncq
    > 4096 out
    > [115786.990430] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4
    > (timeout)
    > [115786.990454] ata6.00: status: { DRDY }
    > [115787.293177] ata6: soft resetting link
    > [115787.446158] ata6: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
    > [115788.133592] ata6.00: configured for UDMA/133
    > [115788.133628] ata6: EH complete
    > [115787.877547] sd 5:0:0:0: [sdf] 586072368 512-byte hardware sectors (300069
    > MB)
    > [115787.877689] sd 5:0:0:0: [sdf] Write Protect is off
    > [115787.877692] sd 5:0:0:0: [sdf] Mode Sense: 00 3a 00 00
    > [115787.878746] sd 5:0:0:0: [sdf] Write cache: enabled, read cache: enabled,
    > doesn't support DPO or FUA
    >
    > What is the true cause of this, is there anyway to get more information?
    >
    > I will test soon with apic/acpi=off.
    >
    > Justin.
    > --
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