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    SubjectRe: Adaptec drivers and 2.6.x kernels
    > > I've been irritated with this for some time now.  I've seen this with 2.6.7
    > > and 2.6.8.1 with both aic7xxx and aic79xx drivers.
    > > I have a bad CD (I burned it as fast as my burner could force. I expected
    > > errors). The scsi drivers do not handle errors very well. I tried to read
    > > this bad cd on an ide cdrom (I have 2 one on hda and one on hdd), it just
    > > gives up with a read error. If I do this on scd0 or scd1 (scd0 is an LG DVD
    > > multi burner using an acard u2w scsi to udma66 converter, scd1 is a plextor
    > > cdrw 40/12/40 narrow scsi), then the driver offlines the drive and I can't
    > > use it anymore.
    > > With this problem, the device recovered with scd1. It was a simple:
    > > cd /proc/scsi
    > > echo "scsi remove-single-device 2 0 1 0" > scsi
    > > echo "scsi add-single-device 2 0 1 0" > scsi
    > > And it now works again. Sometimes it doesn't. scsi bus 0 and 1 are on the
    > > aic79xx [...]
    >
    > I have boxen with aic7xxx and aic79xx that don't see issues of this
    > kind (granted, with bleeding edge -mm). Could you describe the systems
    > in more detail?

    What I described was a single system. See descriptions below, what else will
    I need to provide?

    Motherboard: Supermicro X5DA8 (Intel E7505 chipset, dual channel adaptec
    u320 aic7902B rev10)
    Processors: 2x 2.66ghz P4 Xeon (HT disabled)
    Memory: 2x 512mb DDR333 ECC memory (Supermicro approved)
    Scsi bus 0: Controller AIC-7902B ch0
    Seagate ST34572W (ID0)
    Quantum QM39100TD-SW (2x ID8 and 9)
    Scsi bus 1: Controller AIC-7902B ch1
    HL-DT-ST DVDRAM GSA-4160B (ID0, uses an Acard AEC7722)
    Scsi bus 2: Controller AHA2940U (AIC-7881U)
    Seagate ST34371N (ID0)
    Plextor CDRW PX-W4012S (ID1)
    Archive Python 4gb 4mm DAT (ID6)
    IDE bus 0: Controller Intel ICH4 (Pri)
    Generic Atapi CDROM 52x (Master)
    IDE bus 1: Controller Intel ICH4 (Sec)
    Toshiba DVDROM SD-M1202 (Slave, no master)

    The AHA2940U is in a standard PCI slot (This board has 1 PCI-X 133, 2 PCI-X
    100, 2 PCI 32bit 33mhz, 8x AGP Pro)

    /proc/scsi/scsi:
    Attached devices:
    Host: scsi0 Channel: 00 Id: 00 Lun: 00
    Vendor: SEAGATE Model: ST34572W Rev: 0876
    Type: Direct-Access ANSI SCSI revision: 02
    Host: scsi0 Channel: 00 Id: 08 Lun: 00
    Vendor: QUANTUM Model: QM39100TD-SW Rev: N491
    Type: Direct-Access ANSI SCSI revision: 02
    Host: scsi0 Channel: 00 Id: 09 Lun: 00
    Vendor: QUANTUM Model: QM39100TD-SW Rev: N491
    Type: Direct-Access ANSI SCSI revision: 02
    Host: scsi1 Channel: 00 Id: 00 Lun: 00
    Vendor: HL-DT-ST Model: DVDRAM GSA-4160B Rev: A300
    Type: CD-ROM ANSI SCSI revision: 02
    Host: scsi2 Channel: 00 Id: 00 Lun: 00
    Vendor: SEAGATE Model: ST34371N Rev: 0484
    Type: Direct-Access ANSI SCSI revision: 02
    Host: scsi2 Channel: 00 Id: 01 Lun: 00
    Vendor: PLEXTOR Model: CD-R PX-W4012S Rev: 1.01
    Type: CD-ROM ANSI SCSI revision: 02
    Host: scsi2 Channel: 00 Id: 06 Lun: 00
    Vendor: ARCHIVE Model: Python 28388-XXX Rev: 5.AC
    Type: Sequential-Access ANSI SCSI revision: 02

    lsmod:
    Module Size Used by
    piix 11808 0 [permanent]
    w83781d 32256 0
    eeprom 6792 0
    adm1021 11400 0
    i2c_sensor 2944 3 w83781d,eeprom,adm1021
    i2c_i801 7568 0
    i2c_core 19200 5 w83781d,eeprom,adm1021,i2c_sensor,i2c_i801
    sg 29600 0
    ext2 55144 0
    nfs 96428 3
    ide_cd 38176 0
    ide_core 112612 2 piix,ide_cd
    sr_mod 13860 0
    cdrom 37020 2 ide_cd,sr_mod
    usbhid 29632 0
    r128 100308 2
    snd_intel8x0 29448 1
    snd_ac97_codec 64004 1 snd_intel8x0
    snd_pcm_oss 48424 0
    snd_mixer_oss 17536 1 snd_pcm_oss
    snd_pcm 81156 2 snd_intel8x0,snd_pcm_oss
    snd_timer 21380 1 snd_pcm
    snd_page_alloc 9480 2 snd_intel8x0,snd_pcm
    snd_mpu401_uart 6528 1 snd_intel8x0
    snd_rawmidi 20260 1 snd_mpu401_uart
    snd_seq_device 7048 1 snd_rawmidi
    snd 43620 11 snd_intel8x0,snd_ac97_codec,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_timer,snd_mpu401_uart,snd_rawmidi,snd_seq_device
    soundcore 7648 1 snd
    nfsd 89544 8
    exportfs 5376 1 nfsd
    lockd 57928 3 nfs,nfsd
    sunrpc 132836 7 nfs,nfsd,lockd
    tun 6912 3
    3c59x 36136 0
    e1000 78852 0
    bridge 44056 0
    uhci_hcd 29072 0
    ohci_hcd 15876 0
    ehci_hcd 25092 0
    usbcore 100580 6 usbhid,uhci_hcd,ohci_hcd,ehci_hcd
    reiserfs 239316 3
    iptable_nat 21668 1
    ipt_REJECT 6272 3
    ipt_LOG 6400 5
    ipt_state 2176 10
    ip_conntrack 29708 2 iptable_nat,ipt_state
    iptable_filter 2816 1
    ip_tables 16128 5 iptable_nat,ipt_REJECT,ipt_LOG,ipt_state,iptable_filter
    8250 19936 0
    serial_core 19968 1 8250
    dm_mod 49280 6
    aic7xxx 190648 1

    lspci -v:
    0000:00:00.0 Host bridge: Intel Corp. E7505 Memory Controller Hub (rev 03)
    Subsystem: Super Micro Computer Inc: Unknown device 4080
    Flags: bus master, fast devsel, latency 0
    Memory at f2000000 (32-bit, prefetchable) [size=32M]
    Capabilities: [40] #09 [0104]
    Capabilities: [a0] AGP version 3.0

    0000:00:00.1 ff00: Intel Corp. E7505/E7205 Series RAS Controller (rev 03)
    Subsystem: Super Micro Computer Inc: Unknown device 4080
    Flags: fast devsel

    0000:00:01.0 PCI bridge: Intel Corp. E7505/E7205 PCI-to-AGP Bridge (rev 03) (prog-if 00 [Normal decode])
    Flags: bus master, 66MHz, fast devsel, latency 96
    Memory at f4000000 (32-bit, prefetchable) [size=32M]
    Bus: primary=00, secondary=01, subordinate=01, sec-latency=64
    I/O behind bridge: 00003000-00003fff
    Memory behind bridge: f0100000-f01fffff
    Prefetchable memory behind bridge: f8000000-fbffffff
    Capabilities: [60] #0e [0035]

    0000:00:02.0 PCI bridge: Intel Corp. E7505 Hub Interface B PCI-to-PCI Bridge (rev 03) (prog-if 00 [Normal decode])
    Flags: bus master, 66MHz, fast devsel, latency 64
    Bus: primary=00, secondary=02, subordinate=04, sec-latency=0
    I/O behind bridge: 00004000-00005fff
    Memory behind bridge: f0200000-f04fffff

    0000:00:1d.0 USB Controller: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #1 (rev 02) (prog-if 00 [UHCI])
    Subsystem: Super Micro Computer Inc: Unknown device 4080
    Flags: bus master, medium devsel, latency 0, IRQ 16
    I/O ports at 2440 [size=32]

    0000:00:1d.1 USB Controller: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #2 (rev 02) (prog-if 00 [UHCI])
    Subsystem: Super Micro Computer Inc: Unknown device 4080
    Flags: bus master, medium devsel, latency 0, IRQ 19
    I/O ports at 2460 [size=32]

    0000:00:1d.2 USB Controller: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #3 (rev 02) (prog-if 00 [UHCI])
    Subsystem: Super Micro Computer Inc: Unknown device 4080
    Flags: bus master, medium devsel, latency 0, IRQ 18
    I/O ports at 2480 [size=32]

    0000:00:1d.7 USB Controller: Intel Corp. 82801DB/DBM (ICH4/ICH4-M) USB 2.0 EHCI Controller (rev 02) (prog-if 20 [EHCI])
    Subsystem: Super Micro Computer Inc: Unknown device 4080
    Flags: bus master, medium devsel, latency 0, IRQ 23
    Memory at f0000000 (32-bit, non-prefetchable) [size=1K]
    Capabilities: [50] Power Management version 2
    Capabilities: [58] #0a [2080]

    0000:00:1e.0 PCI bridge: Intel Corp. 82801 PCI Bridge (rev 82) (prog-if 00 [Normal decode])
    Flags: bus master, fast devsel, latency 0
    Bus: primary=00, secondary=05, subordinate=05, sec-latency=168
    I/O behind bridge: 00006000-00006fff
    Memory behind bridge: f0500000-f05fffff

    0000:00:1f.0 ISA bridge: Intel Corp. 82801DB/DBL (ICH4/ICH4-L) LPC Bridge (rev 02)
    Flags: bus master, medium devsel, latency 0

    0000:00:1f.1 IDE interface: Intel Corp. 82801DB/DBL (ICH4/ICH4-L) UltraATA-100 IDE Controller (rev 02) (prog-if 8a [Master SecP PriP])
    Subsystem: Super Micro Computer Inc: Unknown device 4080
    Flags: bus master, medium devsel, latency 0, IRQ 18
    I/O ports at <ignored>
    I/O ports at <ignored>
    I/O ports at <ignored>
    I/O ports at <ignored>
    I/O ports at 24a0 [size=16]
    Memory at f0000400 (32-bit, non-prefetchable) [size=1K]

    0000:00:1f.3 SMBus: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) SMBus Controller (rev 02)
    Subsystem: Super Micro Computer Inc: Unknown device 4080
    Flags: medium devsel, IRQ 17
    I/O ports at 1100 [size=32]

    0000:00:1f.5 Multimedia audio controller: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97 Audio Controller (rev 02)
    Subsystem: Super Micro Computer Inc: Unknown device 4080
    Flags: bus master, medium devsel, latency 0, IRQ 17
    I/O ports at 2000 [size=256]
    I/O ports at 2400 [size=64]
    Memory at f0000c00 (32-bit, non-prefetchable) [size=512]
    Memory at f0000800 (32-bit, non-prefetchable) [size=256]
    Capabilities: [50] Power Management version 2

    0000:01:00.0 VGA compatible controller: ATI Technologies Inc Rage 128 Pro Ultra TF (prog-if 00 [VGA])
    Subsystem: ATI Technologies Inc Rage Fury Pro/Xpert 2000 Pro
    Flags: bus master, stepping, fast Back2Back, 66MHz, medium devsel, latency 66, IRQ 21
    Memory at f8000000 (32-bit, prefetchable) [size=64M]
    I/O ports at 3000 [size=256]
    Memory at f0100000 (32-bit, non-prefetchable) [size=16K]
    Capabilities: [50] AGP version 2.0
    Capabilities: [5c] Power Management version 2

    0000:02:1c.0 PIC: Intel Corp. 82870P2 P64H2 I/OxAPIC (rev 04) (prog-if 20 [IO(X)-APIC])
    Subsystem: Super Micro Computer Inc: Unknown device 4080
    Flags: bus master, 66MHz, fast devsel, latency 0
    Memory at f0200000 (32-bit, non-prefetchable) [size=4K]
    Capabilities: [50] PCI-X non-bridge device.

    0000:02:1d.0 PCI bridge: Intel Corp. 82870P2 P64H2 Hub PCI Bridge (rev 04) (prog-if 00 [Normal decode])
    Flags: bus master, 66MHz, fast devsel, latency 64
    Bus: primary=02, secondary=03, subordinate=03, sec-latency=64
    I/O behind bridge: 00004000-00004fff
    Memory behind bridge: f0300000-f03fffff
    Capabilities: [50] PCI-X bridge device.

    0000:02:1e.0 PIC: Intel Corp. 82870P2 P64H2 I/OxAPIC (rev 04) (prog-if 20 [IO(X)-APIC])
    Subsystem: Super Micro Computer Inc: Unknown device 4080
    Flags: bus master, 66MHz, fast devsel, latency 0
    Memory at f0201000 (32-bit, non-prefetchable) [size=4K]
    Capabilities: [50] PCI-X non-bridge device.

    0000:02:1f.0 PCI bridge: Intel Corp. 82870P2 P64H2 Hub PCI Bridge (rev 04) (prog-if 00 [Normal decode])
    Flags: bus master, 66MHz, fast devsel, latency 64
    Bus: primary=02, secondary=04, subordinate=04, sec-latency=64
    I/O behind bridge: 00005000-00005fff
    Memory behind bridge: f0400000-f04fffff
    Capabilities: [50] PCI-X bridge device.

    0000:03:03.0 Ethernet controller: Intel Corp. 82545EM Gigabit Ethernet Controller (Copper) (rev 01)
    Subsystem: Intel Corp.: Unknown device 1011
    Flags: bus master, 66MHz, medium devsel, latency 64, IRQ 54
    Memory at f0300000 (64-bit, non-prefetchable) [size=128K]
    I/O ports at 4000 [size=64]
    Capabilities: [dc] Power Management version 2
    Capabilities: [e4] PCI-X non-bridge device.
    Capabilities: [f0] Message Signalled Interrupts: 64bit+ Queue=0/0 Enable-

    0000:04:03.0 SCSI storage controller: Adaptec AIC-7902B U320 (rev 10)
    Subsystem: Adaptec: Unknown device 005e
    Flags: bus master, 66MHz, slow devsel, latency 64, IRQ 32
    I/O ports at 5400 [disabled] [size=256]
    Memory at f0400000 (64-bit, non-prefetchable) [size=8K]
    I/O ports at 5000 [disabled] [size=256]
    Capabilities: [dc] Power Management version 2
    Capabilities: [a0] Message Signalled Interrupts: 64bit+ Queue=0/1 Enable-
    Capabilities: [94]
    0000:04:03.1 SCSI storage controller: Adaptec AIC-7902B U320 (rev 10)
    Subsystem: Adaptec: Unknown device 005e
    Flags: bus master, 66MHz, slow devsel, latency 64, IRQ 33
    I/O ports at 5c00 [disabled] [size=256]
    Memory at f0402000 (64-bit, non-prefetchable) [size=8K]
    I/O ports at 5800 [disabled] [size=256]
    Capabilities: [dc] Power Management version 2
    Capabilities: [a0] Message Signalled Interrupts: 64bit+ Queue=0/1 Enable-
    Capabilities: [94]
    0000:05:01.0 Ethernet controller: 3Com Corporation 3c900B-TPC Etherlink XL [Cyclone] (rev 04)
    Subsystem: 3Com Corporation 3c900B-TPC Etherlink XL [Cyclone]
    Flags: bus master, medium devsel, latency 80, IRQ 16
    I/O ports at 6400 [size=128]
    Memory at f0501000 (32-bit, non-prefetchable) [size=128]
    Capabilities: [dc] Power Management version 1

    0000:05:02.0 SCSI storage controller: Adaptec AHA-2940U/UW/D / AIC-7881U (rev 01)
    Subsystem: Adaptec AHA-2940UW SCSI Host Adapter
    Flags: bus master, medium devsel, latency 64, IRQ 17
    I/O ports at 6000 [disabled] [size=256]
    Memory at f0500000 (32-bit, non-prefetchable) [size=4K]
    Capabilities: [dc] Power Management version 1

    ACPI is enabled, Pre-empt is disabled.

    I have one other machine using 2.6 on a regular basis, however, I have no
    cdroms installed in it. I do occasionally see scsi errors on it (It has 3
    IDE Disks, 2 of which are using an acard ide-scsi converter on seperate
    busses)

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